Review Questions Module 5 Electricity PDF

Review Questions Module 5 Introduction to Electricity  1.The “Law of Electrical Charges” is: a) Protons are negatively charged electrical particles. b) Neutrons are positively charged electrical particles. c) Opposite charges attract each other; Like charges repel one another. d) Like...

Review Questions Module 5 Introduction to Electricity  1.The “Law of Electrical Charges” is: a) Protons are negatively charged electrical particles. b) Neutrons are positively charged electrical particles. c) Opposite charges attract each other; Like charges repel one another. d) Like charges attract each other; Opposite charges repel one another.  1.The “Law of Electrical Charges” is: a) Protons are negatively charged electrical particles. b) Neutrons are positively charged electrical particles. c) Opposite charges attract each other; Like charges repel one another. d) Like charges attract each other; Opposite charges repel one another.  2. State the defining difference between direct current electricity (DC) and alternating current electricity (AC). In a DC circuit electrons are moving in one direction (negative to positive). In an AC circuit, electrons are moving back and forth 120 times per second. 3. Electricity can be defined as the movement of atoms. TRUE FALSE 3. Electricity can be defined as the movement of atoms. TRUE FALSE 4. Electrical current (or the flow of electrons) in a wire may cause: a) Friction and heat in the wire. b) The opposite electrical charge to be induced in another material. c) A magnetic field around the wire. d) All of the listed choices. 4. Electrical current (or the flow of electrons) in a wire may cause: a) Friction and heat in the wire. b) The opposite electrical charge to be induced in another material. c) A magnetic field around the wire. d) All of the listed choices. 5. Materials that easily conduct electricity are called: a)insulators b)conductors c)grounds d)ions 5. Materials that easily conduct electricity are called: a)insulators b)conductors c)grounds d)ions 6. Materials that do not easily conduct electricity are called: a)insulators b)conductors c)grounds d)ions 6. Materials that do not easily conduct electricity are called: a)insulators b)conductors c)grounds d)ions 7. Which of the following conditions will allow electricity to flow through a circuit? a) An open switch b) A closed switch 7. Which of the following conditions will allow electricity to flow through a circuit? a) An open switch b) A closed switch 8. Which of the following materials will allow the greatest electrical flow given the same applied voltage? a) Silver b) Aluminum c) Copper d) Ground 8. Which of the following materials will allow the greatest electrical flow given the same applied voltage? a) Silver b) Aluminum c) Copper d) Ground 9. For electricity to flow through a wiring system there must be: a) a difference in electrical pressure between two connected points b) a continuous pathway between the two points of flow c) a circuit made of conducting material d) all of the listed choices. 9. For electricity to flow through a wiring system there must be: a) a difference in electrical pressure between two connected points b) a continuous pathway between the two points of flow c) a circuit made of conducting material d) all of the listed choices. 10. Define the following terms and give at least one example of each. Conductor: A material that allows the easy flow of electrons. Numerous examples including copper, silver, aluminum. Insulator: A material that does not allows the easy flow of electrons. Numerous examples including plastic, wood, glass. 11. Given the same applied electrical pressure, more electrical current will flow though: (circle one of each of the following pairs) a) A hot wireor a cold wire b) A conductor or an insulator c) A thin wire or a thick wire d) A long wire or a short wire 11. Given the same applied electrical pressure, more electrical current will flow though: (circle one of each of the following pairs) a) A hot wireor a cold wire b) A conductor or an insulator c) A thin wire or a thick wire d) A long wire or a short wire 12. Define the following terms and give at least one example of each. The ability of a material to allow electron flow Conductance: _______________________________________________________________ The ability of a material to resist electron flow Resistance: _______________________________________________________________ 13. There are no perfect electrical conductors or insulators. TRUE FALSE 13. There are no perfect electrical conductors or insulators. TRUE FALSE 14. Electromotive force or emf is another term for: a) Voltage b) Current c) Resistance d) Electricity 14. Electromotive force or emf is another term for: a) Voltage b) Current c) Resistance d) Electricity  15. The voltage reading across an open switch of an energized electrical circuit should be: a) applied current b) applied voltage c) zero volts d) zero ohms  15. The voltage reading across an open switch of an energized electrical circuit should be: a) applied current b) applied voltage c) zero volts d) zero ohms 16. The voltage reading across a closed switch of an energized electrical circuit should be zero volts. TRUE FALSE 16. The voltage reading across a closed switch of an energized electrical circuit should be zero volts. TRUE FALSE  17. Which of the following tests on an energized circuit will give a reading of applied voltage? a) Across an open switch b) Across a load c) Across an energized line before the load and the return point of the source d) All of the listed choices  17. Which of the following tests on an energized circuit will give a reading of applied voltage? a) Across an open switch b) Across a load c) Across an energized line before the load and the return point of the source d) All of the listed choices 18. An ampere is a unit for the measurement of: a) Electrical pressure b) Electrical current c) Electrical resistance d) All of the listed choices 18. An ampere is a unit for the measurement of: a) Electrical pressure b) Electrical current c) Electrical resistance d) All of the listed choices 19. Electrical current is measured in: a)volts b)amps c)ohms d)watts 19. Electrical current is measured in: a)volts b)amps c)ohms d)watts 20. Electrical potential is measured in: a)volts b)amps c)ohms d)watts 20. Electrical potential is measured in: a)volts b)amps c)ohms d)watts 21. Electrical resistance is measured in: a)volts b)amps c)ohms d)watts 21. Electrical resistance is measured in: a)volts b)amps c)ohms d)watts 22. When checking to determine an unknown supply voltage with an analog meter having ranges of 0 - 50 volts, 0 - 200 volts, 0 - 600 volts, and 0 - 1000 volts, which range should be selected? a)0 - 50 V b)0 - 200 V c)0 - 600 V d)0 - 1000 V 22. When checking to determine an unknown supply voltage with an analog meter having ranges of 0 - 50 volts, 0 - 200 volts, 0 - 600 volts, and 0 - 1000 volts, which range should be selected? a)0 - 50 V b)0 - 200 V c)0 - 600 V d)0 - 1000 V  23. When it has been determined that the voltage to a unit is approximately 120 volts, which range should an analog volt meter be set at? a)0 - 30 V b)0 - 250 V c)0 - 600 V d)0 - 1000 V  23. When it has been determined that the voltage to a unit is approximately 120 volts, which range should an analog volt meter be set at? a)0 - 30 V b)0 - 250 V c)0 - 600 V d)0 - 1000 V 24. Which meter is used to check for electrical potential? a)ammeter b)ohmmeter c)volt meter d)power meter 24. Which meter is used to check for electrical potential? a)ammeter b)ohmmeter c)volt meter d)power meter 25. Which meter is used to check for electrical continuity? a)ampmeter b)ohmmeter c)volt meter d)power meter 25. Which meter is used to check for electrical continuity? a)ampmeter b)ohmmeter c)volt meter d)power meter  26. When checking an electrical circuit with an ohmmeter meter, a reading of “OL” or “¥” indicates: a)no resistance b)a measurable resistance c)closed circuit d)open circuit  26. When checking an electrical circuit with an ohmmeter meter, a reading of “OL” or “¥” indicates: a)no resistance b)a measurable resistance c)closed circuit d)open circuit 27. The first step in testing voltage in any electrical circuit is to turn on the ohmmeter. TRUE FALSE 27. The first step in testing voltage in any electrical circuit is to turn on the ohmmeter. TRUE FALSE 28. State the meaning of the following symbols found on a multimeter. Volts DC a) V : milliamps b) mA : Ohms c) W : d) V~ : Volts AC e) (: Capacitance f) m : Micro (one millionths) g) A : Amps DC h) K : Kilo (one thousand)  29. Which of the following statements is correct concerning electrical test meters? a) Always start on the lowest voltage scale setting to avoid damaging the meter. b) It will not harm the meter if you turn the selector dial quickly while attached to the circuit. c) Test leads must be disconnected when changing the function select dial d) A milliamp (mA) is equal to 100 amperes.  29. Which of the following statements is correct concerning electrical test meters? a) Always start on the lowest voltage scale setting to avoid damaging the meter. b) It will not harm the meter if you turn the selector dial quickly while attached to the circuit. c) Test leads must be disconnected when changing the function select dial d) A milliamp (mA) is equal to 100 amperes. 30. The black test probe on a multimeter must be connected into the _______ COM jack and the red test appropriate probe must be connected into the ______ jack.  31. If a voltage measurement across an open switch indicates applied voltage, the motor connected to that switch is safe to work on. TRUE FALSE Explain Your Answer: ________________________  31. If a voltage measurement across an open switch indicates applied voltage, the motor connected to that switch is safe to work on. TRUE FALSE Explain your answer: ___ Switch may be in the neutral line  32. Which of the following statements is correct concerning ammeters? a) An in-line ammeter must be connected across the load like a volt meter. b) An ammeter measures resistance in ohms. c) An in-line ammeter must be connected as part of the circuit with the load. d) The jaws of a clamp-on ammeter must surround both conductors (hot and neutral).  32. Which of the following statements is correct concerning ammeters? a) An in-line ammeter must be connected across the load like a volt meter. b) An ammeter measures resistance in ohms. c) An in-line ammeter must be connected as part of the circuit with the load. d) The jaws of a clamp-on ammeter must surround both conductors (hot and neutral).  33. Which of the following statements is correct concerning ohmmeters? a) An ohmmeter must never be connected to a live circuit. b) An ohmmeter must always be connected to a live circuit. c) The ohmmeter scale on an analog meter is divided into equal increments. d) The ohmmeter scale on an analog meter is read from left to right.  33. Which of the following statements is correct concerning ohmmeters? a) An ohmmeter must never be connected to a live circuit. b) An ohmmeter must always be connected to a live circuit. c) The ohmmeter scale on an analog meter is divided into equal increments. d) The ohmmeter scale on an analog meter is read from left to right.  34. A DC voltage measurement is being taken when the needle on the analog meter moves to below zero on the scale. This indicates that the: a)The battery is dead b)The meter is broken c)The test leads are reversed d)There is negative voltage 34. A DC voltage measurement is being taken when the needle on the analog meter moves to below zero on the scale. This indicates that the: a)The battery is dead b)The meter is broken c)The test leads are reversed d)There is negative voltage 35. No. 14 AWG electrical wire is thicker than No. 16 electrical wire and can carry more electrical current safely. TRUE FALSE 35. No. 14 AWG electrical wire is thicker than No. 16 electrical wire and can carry more electrical current safely. TRUE FALSE 36. Which of the following statements is NOT correct? a) No. 14 AWG electrical wire is approved for use on 30 amp circuits. b) No. 14 AWG electrical wire has stranded wire for flexible use. c) No. 14 AWG electrical wire is approved for use on 15 amp circuits. d) No. 14 AWG electrical wire always has two conductor wires.  36. Which of the following statements is NOT correct? a) No. 14 AWG electrical wire is approved for use on 30 amp circuits. b) No. 14 AWG electrical wire has stranded wire for flexible use. c) No. 14 AWG electrical wire is approved for use on 15 amp circuits. d) No. 14 AWG electrical wire always has two conductor wires.  37. Give the insulation colour code(s) of the following electrical conductors. Green or Bare L2 (Neutral):__________________ Ground:_____________ White or Natural Grey Any colour other than the ones above L1 (Source or Hot):____________________________  38. Which of the following statements are correct concerning electrical conductors? a) A gouge in an electrical wire should be repaired with electrical tape b) Armoured cable can only be used for wet locations outdoors c) A junction box connector approved for the box and wire type must be used d) Wires should be bent around terminal connection screws in a counter clockwise direction  38. Which of the following statements are correct concerning electrical conductors? a) A gouge in an electrical wire should be repaired with electrical tape b) Armoured cable can only be used for wet locations outdoors c) A junction box connector approved for the box and wire type must be used d) Wires should be bent around terminal connection screws in a counter clockwise direction 39. The ohmmeter reading across a good fuse that is removed from the circuit, will be: a)0 Volts b)0 ohms c)0 amps d)Infinity 39. The ohmmeter reading across a good fuse that is removed from the circuit, will be: a)0 Volts b)0 ohms c)0 amps d)Infinity 40. The ohmmeter reading across a blown fuse that is removed from the circuit, will be: a)0 volts b)0 ohms c)0 amps d)Infinity 40. The ohmmeter reading across a blown fuse that is removed from the circuit, will be: a)0 volts b)0 ohms c)0 amps d)Infinity 41. Match the following wiring schematic symbols for listed types of conductors. Draw lines connecting the matches.  Define the following electrical terms and give one example for ea uit: A free flow of electrons from the source back to the source without an intervening load. A low-level excessive current draw beyond the design ampacity of the circuit. 43. A badly burned or charred fuse indicates: a) A short circuit. b) Insufficient current. c) An overload. d) A good fuse. 43. A badly burned or charred fuse indicates: a) A short circuit. b) Insufficient current. c) An overload. d) A good fuse. 44. A voltage drop never occurs across a switch. TRUE FALSE 44. A voltage drop never occurs across a switch. TRUE FALSE 45. State the full names of the four types of electrical switches abbreviated below. a) DPST:Double Pole; Single Throw b) SPST:Single Pole; Single Throw c) DPDT:Double Pole; Double Throw d) DPDT:Single Pole; Double Throw 46. The line connection terminals on a 120-volt receptacle are: a)green b)gold c)silver d)black 46. The line connection terminals on a 120-volt receptacle are: a)green b)gold c)silver d)black 47. the neutral connection terminals on a 120-volt receptacle are: a)green b)gold c)silver d)black 47. the neutral connection terminals on a 120-volt receptacle are: a)green b)gold c)silver d)black 48. Ohm’s law is employed in electrical work to: a) Determine the resistance of a circuit if the voltage and current are known. b) Determine the voltage of a circuit if the resistance and current are known. c) Determine the current of a circuit if the resistance and voltage are known. d) All of the listed choices. 48. Ohm’s law is employed in electrical work to: a) Determine the resistance of a circuit if the voltage and current are known. b) Determine the voltage of a circuit if the resistance and current are known. c) Determine the current of a circuit if the resistance and voltage are known. d) All of the listed choices.  49. Ohm’s law states: a) Opposite charges attract and like charges repel b) It takes one volt to push one amp through one ohm. c) Resistance determines the applied voltage d) Increasing voltage will increase resistance  49. Ohm’s law states: a) Opposite charges attract and like charges repel b) It takes one volt to push one amp through one ohm. c) Resistance determines the applied voltage d) Increasing voltage will increase resistance 50. If voltage is increased in a simple circuit, current will: a) Increase b) Decrease c) Stay the same d) Fluctuate. 50. If voltage is increased in a simple circuit, current will: a) Increase b) Decrease c) Stay the same d) Fluctuate.  51. Given a constant supply voltage, if resistance increases in a simple circuit, current will: a) Increase b) Decrease c) Stay the same d) Fluctuate  51. Given a constant supply voltage, if resistance increases in a simple circuit, current will: a) Increase b) Decrease c) Stay the same d) Fluctuate 52. Electrical power is measured in units of: a) Ohms b) Volts c) Watts d) Horsepower 52. Electrical power is measured in units of: a) Ohms b) Volts c) Watts d) Horsepower 53. One horsepower of mechanical power is equal to _____watts of electrical power. a) 24 b) 56 c) 746 d) 1346 53. One horsepower of mechanical power is equal to _____watts of electrical power. a) 24 b) 56 c) 746 d) 1346 54. Which of the following changes to an electrical circuit will increase power delivery to the load? a) Current can be increased. b) Resistance can be decreased c) Voltage can be increased. d) All of the listed choices. 54. Which of the following changes to an electrical circuit will increase power delivery to the load? a) Current can be increased. b) Resistance can be decreased c) Voltage can be increased. d) All of the listed choices.  55. If voltage is constant, what could cause current to increase? a) An increase in resistance b) A decrease in resistance c) Back emf from a solenoid coil d) All of the above 56. One watt equals ______________ Btuh. a) 0.5 b) 3.41 c) 3,412 d) 5,020 56. One watt equals ______________ Btuh. a) 0.5 b) 3.41 c) 3,412 d) 5,020 57. What is the Btuh output of an electric heater rated at 20 kW? a) 10 b) 68.2 c) 68,240 d) 100,400 57. What is the Btuh output of an electric heater rated at 20 kW? a) 10 b) 68.2 c) 68,240 d) 100,400 58. Identify the type of circuit in the following diagrams: a) b) c) d) 58. Identify the type of circuit in the following diagrams: a) Simple circuit b) Parallel circuit c) Series circuit d)Series-parallel circuit  59. Which of the following statements is correct concerning a series electrical circuit? a) The loads in a series circuit operate independent of each other. b) There is only one load in a series circuit. c) The voltage drop across each load in a series circuit is always equal. d) If one load fails in a series circuit then all loads will stop operating.  59. Which of the following statements is correct concerning a series electrical circuit? a) The loads in a series circuit operate independent of each other. b) There is only one load in a series circuit. c) The voltage drop across each load in a series circuit is always equal. d) If one load fails in a series circuit then all loads will stop operating.  60. Which statement is correct? a) Current will flow with one load not operating in a series circuit b) Current is not affected by varying voltage or resistance in a series circuit c) Current will be the same throughout the series circuit d) Current will be different after each load in a series circuit  60. Which statement is correct? a) Current will flow with one load not operating in a series circuit b) Current is not affected by varying voltage or resistance in a series circuit c) Current will be the same throughout the series circuit d) Current will be different after each load in a series circuit  61. With constant supply voltage, what will be the effect on total current if the resistance is decreased in any one branch circuit of a parallel circuit? a) No effect b) Amperage will increase c) Amperage will decrease d) Amperage will fluctuate  61. With constant supply voltage, what will be the effect on total current if the resistance is decreased in any one branch circuit of a parallel circuit? a) No effect b) Amperage will increase c) Amperage will decrease d) Amperage will fluctuate 62. Answer the following questions using this circuit diagram: ) The total resistance of the circuit is _______. ) If the supply voltage is 100 V, the current in the circuit will be _______. ) If the current in the circuit is 1 amp, the supply voltage must be _______. 62. Answer the following questions using this circuit diagram: ) The total resistance of the circuit is ____100W___. ) If the supply voltage is 100 V, the current in the circuit will be ___1 amp____. ) If the current in the circuit is 1 amp, the supply voltage must be __100 V___. 63. The total resistance of a series circuit that consists of two 10 W loads is: a) 20 W b) 5W c) 10 W d) Depends on the supply voltage to the circuit. 63. The total resistance of a series circuit that consists of two 10 W loads is: a) 20 W b) 5W c) 10 W d) Depends on the supply voltage to the circuit. 64. The amperage reading at any point in a parallel circuit will be: a) 0 amps b) supply amperage c) the same throughout the circuit d) different on main line compared to each branch line 64. The amperage reading at any point in a parallel circuit will be: a) 0 amps b) supply amperage c) the same throughout the circuit d) different on main line compared to each branch line 65. If the voltage drop across a load in a simple circuit is not the applied voltage, this indicates: a) There is more than one load wired in series with the tested load. b) There are two loads wired in parallel with the tested load. c) The load is faulty. d) Nothing is the matter. 65. If the voltage drop across a load in a simple circuit is not the applied voltage, this indicates: a) There is more than one load wired in series with the tested load. b) There are two loads wired in parallel with the tested load. c) The load is faulty. d) Nothing is the matter.  66. The equivalent resistance of two 20 W resistors connected in parallel is: a) 0.2 W b) 10.0 W c) 20.0 W d) 40.0 W  66. The equivalent resistance of two 20 W resistors connected in parallel is: a) 0.2 W b) 10.0 W c) 20.0 W d) 40.0 W  67. The equivalent resistance of two 20 W resistors connected in series is: a) 0.2 W b) 10.0 W c) 20.0 W d) 40.0 W  67. The equivalent resistance of two 20 W resistors connected in series is: a) 0.2 W b) 10.0 W c) 20.0 W d) 40.0 W 68. Will the following circuits operate properly (i.e. will all bulbs glow)? Give your reasons a) Yes No Reasons: ____________________________________________ b) Yes No Reasons: ______________________________________  68. Will the following circuits operate properly (i.e. will all bulbs glow)? Give your reasons a) Yes No Reasons: ___ Short circuit _________________________________________ b) Yes No Reasons: ___ Left bulb will not work___________________________________  68. Will the following circuits operate properly (i.e. will all bulbs glow)? Give your reasons c) Yes No Reasons: ______________________________________________________ d) Yes No Reasons: __________________________________________________ ____  68. Will the following circuits operate properly (i.e. will all bulbs glow)? Give your reasons c) Yes No Reasons: ______________________________________________________ d) Yes No Reasons: __ Two left bulbs will glow but the two right ones will not ______ 69. The current required to operate a device rated for 1200 watts at 120 volts is: a) 10 amps b) 12 amps c) 100 amps d) 15 amps 69. The current required to operate a device rated for 1200 watts at 120 volts is: a) 10 amps b) 12 amps c) 100 amps d) 15 amps 70. If a circuit is wired so that electrons can flow in only one possible path, the circuit is called a/an: a)parallel circuit. b)broken circuit. c)series circuit. d)series-parallel circuit. 70. If a circuit is wired so that electrons can flow in only one possible path, the circuit is called a/an: a)parallel circuit. b)broken circuit. c)series circuit. d)series-parallel circuit. 71. In a parallel circuit containing a 10 W, a 20 W and a 30 W resistor, the current flow is: a)highest through the 10 W resistor. b)highest through the 20 W resistor. c)highest through the 30 W resistor. d)equal through all three resistors. 71. In a parallel circuit containing a 10 W, a 20 W and a 30 W resistor, the current flow is: a)highest through the 10 W resistor. b)highest through the 20 W resistor. c)highest through the 30 W resistor. d)equal through all three resistors. 72 Total resistance (RT) in a series circuit is equal to: a)Supply amperage b)Supply voltage c)Sum of each individual resistance in the circuit d)The true RMS reading 72 Total resistance (RT) in a series circuit is equal to: a)Supply amperage b)Supply voltage c)Sum of each individual resistance in the circuit d)The true RMS reading 73. The total current in a parallel circuit will be: a)120 Volts b)0 Ohms c)15 Amps d)The sum of the current passing through each branch circuit 73. The total current in a parallel circuit will be: a)120 Volts b)0 Ohms c)15 Amps d)The sum of the current passing through each branch circuit 74. Which statement is correct concerning a parallel circuit? a)The total resistance of the circuit is the sum of each individual resistance in the circuit b)The total resistance of the circuit will be less than the smallest resistance in the circuit c)The current reading will be the same throughout the circuit d)Voltage drop across each load is more than the voltage supplied  74. Which statement is correct concerning a parallel circuit? a)The total resistance of the circuit is the sum of each individual resistance in the circuit b)The total resistance of the circuit will be less than the smallest resistance in the circuit c)The current reading will be the same throughout the circuit d)Voltage drop across each load is more than the voltage supplied  75. Which statement is correct? a)The series-parallel circuit is commonly used in gas appliances b)A corroded switch may cause a parallel circuit to act like a series-parallel c)The series circuit is commonly used in gas appliances d)The parallel circuit is never used in gas appliances  75. Which statement is correct? a)The series-parallel circuit is commonly used in gas appliances b)A corroded switch may cause a parallel circuit to act like a series-parallel c)The series circuit is commonly used in gas appliances d)The parallel circuit is never used in gas appliances 76. Given a constant supply voltage, which statement is correct? a)The current through each branch circuit in a parallel circuit depends on the resistance of the load in that branch circuit. b)The current through each branch circuit in a parallel circuit is not affected by the resistance of the load in that branch circuit. c)The current through the main supply to all branch circuits in a parallel circuit will be less than the current passing through any of the individual branch circuits. d)The current through each branch in a parallel circuit is reduced by the resistance of the loads in the other branches of the circuit. 76. Given a constant supply voltage, which statement is correct? a)The current through each branch circuit in a parallel circuit depends on the resistance of the load in that branch circuit. b)The current through each branch circuit in a parallel circuit is not affected by the resistance of the load in that branch circuit. c)The current through the main supply to all branch circuits in a parallel circuit will be less than the current passing through any of the individual branch circuits. d)The current through each branch in a parallel circuit is reduced by the resistance of the loads in the other branches of the circuit. 77. Which type of circuit will allow a load to deliver its design power rating if the load is designed for 24V? a)24V Series circuit with another load in series b)24V Parallel circuit – no matter which branch line it is installed in c)24V Series-parallel circuit – no matter which branch line it is installed in d)120V Parallel circuit – no matter which branch line it is installed in 77. Which type of circuit will allow a load to deliver its design power rating if the load is designed for 24V? a)24V Series circuit with another load in series b)24V Parallel circuit – no matter which branch line it is installed in c)24V Series-parallel circuit – no matter which branch line it is installed in d)120V Parallel circuit – no matter which branch line it is installed in  78. In North America, AC power is produced at a frequency of _____ cycles per second (also known as ______ Hertz). a) 60 b) 100 c) 50 d) 14  78. In North America, AC power is produced at a frequency of _____ cycles per second (also known as ______ Hertz). a) 60 b) 100 c) 50 d) 14 79. Answer the following questions in reference to the sine wave graph below. a) Are voltage and current in phase or out of phase? (Circle one) In phase Out of phase b) If a circuit had this voltage and current relationship, what type of load would you expect is connected to the circuit? (Circle one) Resistive Capacitive Inductive 79. Answer the following questions in reference to the sine wave graph below. a) Are voltage and current in phase or out of phase? (Circle one) In phase Out of phase b) If a circuit had this voltage and current relationship, what type of load would you expect is connected to the circuit? (Circle one) Resistive Capacitive Inductive  80. Back emf is an electrical term that means: a) Positive applied voltage from the electrical supply b) Induced voltage from the coil of an inductor that opposes applied voltage c) Negative applied voltage from the electrical supply d) A back flow of current produced by a conductive metal  80. Back emf is an electrical term that means: a) Positive applied voltage from the electrical supply b) Induced voltage from the coil of an inductor that opposes applied voltage c) Negative applied voltage from the electrical supply d) A back flow of current produced by a conductive metal 81. Which of the following are connected to a grounding rod in a properly installed electrical installation? a) Neutral wire b) Ground wire c) Electrical panel d) All of the listed choices 81. Which of the following are connected to a grounding rod in a properly installed electrical installation? a) Neutral wire b) Ground wire c) Electrical panel d) All of the listed choices  82. Which of the following statements is correct concerning electrical installations? a) The ground wire must be connected to the neutral wire at each junction box b) The ground wire must be connected to each junction box c) The ground wires must be connected together inside the junction box d) Both b) and c)  82. Which of the following statements is correct concerning electrical installations? a) The ground wire must be connected to the neutral wire at each junction box b) The ground wire must be connected to each junction box c) The ground wires must be connected together inside the junction box d) Both b) and c)  83. Which statement is correct? a)Batteries supply alternating current (AC). b)Direct current flows from the positive to negative terminals. c)Direct current electricity alternates polarity 60 times per second d)Direct current measurements are polarity sensitive (i.e. black test probe must be on negative terminal).  83. Which statement is correct? a)Batteries supply alternating current (AC). b)Direct current flows from the positive to negative terminals. c)Direct current electricity alternates polarity 60 times per second d)Direct current measurements are polarity sensitive (i.e. black test probe must be on negative terminal). 84. The direction of the electrical current through a conductor determines: a) the voltage in the circuit b) the resistance in the circuit c) the polarity of the magnetic field around the conductor d) the strength of the magnetic field around the conductor 84. The direction of the electrical current through a conductor determines: a) the voltage in the circuit b) the resistance in the circuit c) the polarity of the magnetic field around the conductor d) the strength of the magnetic field around the conductor 85. The intensity of the electrical current through a conductor determines: a) the voltage in the circuit b) the resistance in the circuit c) the polarity of the magnetic field around the conductor d) the strength of the magnetic field around the conductor 85. The intensity of the electrical current through a conductor determines: a) the voltage in the circuit b) the resistance in the circuit c) the polarity of the magnetic field around the conductor d) the strength of the magnetic field around the conductor  86. A properly designed induction coil in an electromagnet will have very little current flowing through it when the electromagnetic force is not doing any work. TRUE FALSE  86. A properly designed induction coil in an electromagnet will have very little current flowing through it when the electromagnetic force is not doing any work. TRUE FALSE 87. An ohmmeter reading across the wires on a good induction coil will indicate: a) Infinite resistance b) Measurable resistance c) Zero resistance d) Fluctuating resistance 87. An ohmmeter reading across the wires on a good induction coil will indicate: a) Infinite resistance b) Measurable resistance c) Zero resistance d) Fluctuating resistance 88. An ohmmeter reading between a good solenoid coil and the solenoid casing will indicate: a) Infinite resistance b) Measurable resistance c) Zero resistance d) Fluctuating resistance 88. An ohmmeter reading between a good solenoid coil and the solenoid casing will indicate: a) Infinite resistance b) Measurable resistance c) Zero resistance d) Fluctuating resistance 89. The current draw of an electric motor is consistent from start to finish. TRUE FALSE 89. The current draw of an electric motor is consistent from start to finish. TRUE FALSE 90. A centrifugal switch on an electric motor: a) Controls the power to the start windings b) Controls the power to the run windings c) Increases voltage to the motor d) Is a safety switch to protect the motor from overheating 90. A centrifugal switch on an electric motor: a) Controls the power to the start windings b) Controls the power to the run windings c) Increases voltage to the motor d) Is a safety switch to protect the motor from overheating 91. Electrical current flows through a capacitor to increase starting torque on a motor TRUE FALSE 91. Electrical current flows through a capacitor to increase starting torque on a motor TRUE FALSE – electrons do not flow through a capacitor 92. A relay switch in most gas-fired appliances is activated by the low-voltage control circuit but makes or breaks connections in the line voltage circuit. TRUE FALSE 92. A relay switch in most gas-fired appliances is activated by the low-voltage control circuit but makes or breaks connections in the line voltage circuit. TRUE FALSE 93. Transformers are very inefficient electrical devices that consume a lot of power. TRUE FALSE 93. Transformers are very inefficient electrical devices that consume a lot of power. TRUE FALSE 94. If there are more turns of wire on the primary windings of a transformer than on the secondary winding, the transformer is called a: a) Relay b) Step-up transformer c) Step-down transformer d) Solenoid  94. If there are more turns of wire on the primary windings of a transformer than on the secondary winding, the transformer is called a: a) Relay b) Step-up transformer c) Step-down transformer d) Solenoid 95. If there are fewer turns of wire on the primary windings of a transformer than on the secondary winding, the transformer is called a: a) Relay b) Step-up transformer c) Step-down transformer d) Solenoid 95. If there are fewer turns of wire on the primary windings of a transformer than on the secondary winding, the transformer is called a: a) Relay b) Step-up transformer c) Step-down transformer d) Solenoid  96. More electrical current will flow in the secondary circuit of a 40 VA transformer than will in the secondary circuit of a 100 VA rated transformer. TRUE FALSE  96. More electrical current will flow in the secondary circuit of a 40 VA transformer than will in the secondary circuit of a 100 VA rated transformer. TRUE FALSE 97. If the primary winding of a transformer has an applied voltage of 120V and a current of 1 amp, the maximum current available on the 30V secondary side of the transformer would be: a) 3 amps b) 120 amps c) 4 amps d) 36 amps 97. If the primary winding of a transformer has an applied voltage of 120V and a current of 1 amp, the maximum current available on the 30V secondary side of the transformer would be: a) 3 amps b) 120 amps c) 4 amps d) 36 amps 98. A “VA” rating on a transformer indicates: a) The available power to the secondary circuit b) The available power to the primary circuit c) The transformer uses varying amperage d) The transformer can only be used with a DC power supply 98. A “VA” rating on a transformer indicates: a) The available power to the secondary circuit b) The available power to the primary circuit c) The transformer uses varying amperage d) The transformer can only be used with a DC power supply  99. Ignition transformers are: a) Step-up transformers b) Step-down transformers c) Digital transformers d) Auto transformers  99. Ignition transformers are: a) Step-up transformers b) Step-down transformers c) Digital transformers d) Auto transformers  100. Transformers which produce a secondary voltage that is higher than the primary are called: a)step down transformers. b)step up transformers. c)auto transformers. d)neutral transformers.  100. Transformers which produce a secondary voltage that is higher than the primary are called: a)step down transformers. b)step up transformers. c)auto transformers. d)neutral transformers. 101. Transformers which produce a secondary voltage which is lower than the primary are called step down transformers. TRUE FALSE 101. Transformers which produce a secondary voltage which is lower than the primary are called step down transformers. TRUE FALSE 102. Which of the following laws is a Gas Technician required to comply with when working on electrical circuits? a) Gas Code - CSA B149 b) Gas technician scope of certification in Ontario Regulation 215/01 c) Ontario Electrical Code d) All of the listed choices 102. Which of the following laws is a Gas Technician required to comply with when working on electrical circuits? a) Gas Code - CSA B149 b) Gas technician scope of certification in Ontario Regulation 215/01 c) Ontario Electrical Code d) All of the listed choices  103. A G.3 certificate is authorized to install electrical wire from the electrical panel to the gas- fired appliance if that work is conducted under the supervision of a G.1 or G.2. TRUE FALSE  103. A G.3 certificate is authorized to install electrical wire from the electrical panel to the gas- fired appliance if that work is conducted under the supervision of a G.1 or G.2. TRUE FALSE  104. Whose responsibility is it to get an electrical work permit to install a gas-fired appliance? a) The owner of the building where the appliance is to be installed b) The installing contractor c) A permit is not required d) The manufacturer of the appliance 104. Whose responsibility is it to get an electrical work permit to install a gas-fired appliance? a) The owner of the building where the appliance is to be installed b) The installing contractor c) A permit is not required d) The manufacturer of the appliance 105. The Electrical Code requires that only one bare conductor is connected to a screw terminal. TRUE FALSE 105. The Electrical Code requires that only one bare conductor is connected to a screw terminal. TRUE FALSE  106. Electrical wires shall be supported: a) Every 5 feet (1.5 m) b) Every 10 feet (3 m) c) Within one foot (300 mm) of a junction box or turn in direction d) Both a) and c)  106. Electrical wires shall be supported: a) Every 5 feet (1.5 m) b) Every 10 feet (3 m) c) Within one foot (300 mm) of a junction box or turn in direction d) Both a) and c)  107. The branch electrical circuit to a heating appliance may be used to supply power to: a) Lighting in the furnace room b) Other electrical devices as long as the total amp draw is less than 15 amps c) Accessories necessary for the safe operation of the appliance d) Electrical outlets within 10 feet (3m) of the heating appliance. 107. The branch electrical circuit to a heating appliance may be used to supply power to: a) Lighting in the furnace room b) Other electrical devices as long as the total amp draw is less than 15 amps c) Accessories necessary for the safe operation of the appliance d) Electrical outlets within 10 feet (3m) of the heating appliance. 108. How far into a junction box must conductors extend? a)2 inches (50 mm) b)6 inches (150 mm) c)9 inches (225 mm) d)12 inches (300 mm) 108. How far into a junction box must conductors extend? a)2 inches (50 mm) b)6 inches (150 mm) c)9 inches (225 mm) d)12 inches (300 mm) 109. Which of the following statements is correct? a) A wet body has more resistance than a dry body. b) A current of 15 amps is required to cause damage to the human body. c) Electrical shock is caused by voltage. d) Less than one ampere of electricity can kill a person. 109. Which of the following statements is correct? a) A wet body has more resistance than a dry body. b) A current of 15 amps is required to cause damage to the human body. c) Electrical shock is caused by voltage. d) Less than one ampere of electricity can kill a person.  110. If a co-worker is suffering a shock from an electrical circuit and cannot let go of the circuit, the first action to take is: a) Call the emergency response phone number b) Give the co-worker a quick push to free him or her from the circuit c) Disconnect the power to the electrical circuit d) Grab the closest object and shove the person away from the circuit  110. If a co-worker is suffering a shock from an electrical circuit and cannot let go of the circuit, the first action to take is: a) Call the emergency response phone number b) Give the co-worker a quick push to free him or her from the circuit c) Disconnect the power to the electrical circuit d) Grab the closest object and shove the person away from the circuit 111. Electricity can only flow through electrical wires. TRUE FALSE 111. Electricity can only flow through electrical wires. TRUE FALSE 112. Which of the following statements is correct concerning electrical shock? a) Voltage levels are more important than current levels b) High voltage is always more deadly than low voltage c) A wet body has less resistance than a dry body d) AC voltage is more dangerous than DC voltage 112. Which of the following statements is correct concerning electrical shock? a) Voltage levels are more important than current levels b) High voltage is always more deadly than low voltage c) A wet body has less resistance than a dry body d) AC voltage is more dangerous than DC voltage 113. Which class of fire extinguisher should be used to extinguish an electrical fire? a)Class A b)Class B c)Class C d)Class D 113. Which class of fire extinguisher should be used to extinguish an electrical fire? a)Class A b)Class B c)Class C d)Class D 114. What will happen if you use water to extinguish an electrical fire? a)Fire may be extinguished b)Possible electrocution c)Fire would spread d)Fire would cause a short to ground 114. What will happen if you use water to extinguish an electrical fire? a)Fire may be extinguished b)Possible electrocution c)Fire would spread d)Fire would cause a short to ground