Electrical Installation and Maintenance NC III Written Test PDF

TECHNICAL EDUCATION AND SKILLS DEVELOPMENT AUTHORITY National Assessment for ELECTRICAL INSTALLATION AND MAINTENANCE NC III WRITTEN TEST  SET A Qualification: ELECTRICAL INSTALLATION AND...

TECHNICAL EDUCATION AND SKILLS DEVELOPMENT AUTHORITY National Assessment for ELECTRICAL INSTALLATION AND MAINTENANCE NC III WRITTEN TEST  SET A Qualification: ELECTRICAL INSTALLATION AND MAINTENANCE NC III Units of  Perform installation of data measurement and control Competency system on electrical and auxiliary equipment. covered:  Install, assemble, test and maintain motor control system INSTRUCTIONS: Read the directions carefully. DO NOT WRITE ANYTHING ON THIS TEST BOOKLET. Write your answers on the answer sheet provided. You may use the back page of your answer sheet for scratch work. You have one (1) hour to complete this test, but if you finish earlier, you may hand in your Test Booklet together with your Answer Sheet to your Assessor. Choose the best option. Write only the letter that corresponds to your choice on the space provided on the answer sheet. Use CAPITAL Letters Only Example 1: MULTIPLE CHOICE To ensure safety of tools and equipment, these must be stored at the – A. Production office B. Locker room C. Tool room D. Electrical room Tool room is the best option or correct answer, so write C on the appropriate blank on your answer sheet. IMPORTANT: DO NOT TURN TO THE NEXT PAGE UNLESS YOU ARE TOLD TO DO SO ELCEIM315-0917 1 Electrical Installation and Maintenance NC III TEST BEGINS HERE: 1. In circuit that contains an inductance as magnetic coil, what would be the relation of the current to the voltage? A. The current will leads the voltage B. The current and the voltage will be in phase C. May damage the equipment D. The current will lags the voltage 2. Oil spills on concrete floors are usually taken care of by ___________. A. Using floor mop B. Splashing with gasoline C. Washing with pressurized water D. Spreading sand and turn sweep it 3. The reason for grounding the frame of a portable electric hand tool is to ________. A. Reduce electric shock B. Prevent short electrical circuit C. Prevent overheating of the tool D. Prevent the frame of the tool from becoming alive to ground 4. For safety in the use of climbing ladder, you must position the ladder ______. A. 30o from the vertical B. 35o from the vertical C. 45o from the vertical D. 75o from the vertical 5. The installation of under-floor raceway shall be beneath the surface of concrete or other flooring materials must be covered with ____________ or equivalent floor covering. A. Glass B. Linoleum C. Metal Clad D. Laminated Steel ELCEIM315-0917 2 Electrical Installation and Maintenance NC III 6. The combine cross-sectional area of all conductors or cables shall not exceed _____________ of the interior cross-sectional area of the cell or header. A. 25% B. 30% C. 40% D. 50% 7. What amount of current will be drawn by incandescent bulb connected to a 115- volt circuit if its resistance is 264.5 ohms? A. 0.45 amps. B. 0.43 amps. C. 0.42 amps. D. 2.3 amps. 8. When measuring ballast resistance if it is defective or good, it is necessary that the source A. energized B. de-energized C. unloaded D. loaded 9. A circuit breaker is an electrical protective device which ______. A. protects electrical equipment from incoming spike voltage B. protects electrical equipment for current surges and overloads C. breaks power flow when a very low voltage is encountered D. trips off when a very low current is encountered 10. A live duplex wire can be de-energized quickly and safely by cutting ______. A. across with an electrical pliers B. across using a mechanical pliers C. one-by-one with a knife D. one-by-one using diagonal cutter ELCEIM315-0917 3 Electrical Installation and Maintenance NC III 11. The required power supply connected to the electrical system having a system neutral is A. Wye connected Transformer B. Delta connected Generator C. Delta connected Transformer D. Single Phase four wire 12. What will happen to the motor if its rotor is accidentally locked and forced to stop rotating while in operation? The motor will ______. A. encounter high voltage B. encounter high current C. create a very loud noise D. burn immediately 13. What will happen to a 1HP, 230V, 1-Phase, 60Hz motor if supplied with 110VAC electrical power? The motor will ______. A. NOT rotate and will burn B. rotate slowly, encounter high current, and may get burn. C. rotate slowly but steadily at normal current D. rotate intermittently 14. The switch used for starting the motor is A. Dual motor pushbutton switch B. Reverse pushbutton switch C. Normally open pushbutton switch D. Single pole switch 15. The required rated voltage applied to a six leads out motor are A. 380-volts and 220-volts B. 220-volts and 127-volts C. 440-volts and 254-volts D. All of the above ELCEIM315-0917 4 Electrical Installation and Maintenance NC III 16. Electrical faults are handled by circuit breaker through its ______. A. tripping capacity B. interrupting capacity C. voltage rating D. trip time setting 17. Before energizing the main circuit breaker, it is proper that all loads ______. A. and branch circuit breaker are energized B. are switch on and branch circuit breaker de-energized C. are switch off and branch circuit breaker energized D. and branch circuit breaker are de-energized 18. A 3-phase motor got burned when it encountered single phasing due to loose cable termination. What protective device would you recommend to prevent the motor from being damage due to recurring single phasing? A. Overload relay B. Over current relay C. Phase sensing relay D. Under voltage relay 19. What protective device will you install to a motor to prevent accidental reversing of rotation due to phase reversal? A. Phase sequence relay B. Reverse power relay C. Electrical interlock relay D. Latching relay 20. The full load current of a motor is 40 Amperes, the conductor allows for this motor should be able to carry as much as A. 125% of the full load current B. 50% of the full load current C. greater than 40 Amperes D. less than 40 Amperes ELCEIM315-0917 5 Electrical Installation and Maintenance NC III