Power Plant Engineering Terminologies Reviewer PDF

lOMoARcPSD|45663754 Power Plant Engineering Terminologies Reviewer Mechanical Engineering (Sorsogon State College) Scan to open on Studocu Studocu is not sponsored or endorsed by any college or university Downloaded by JULIANNE ANTONETT...

lOMoARcPSD|45663754 Power Plant Engineering Terminologies Reviewer Mechanical Engineering (Sorsogon State College) Scan to open on Studocu Studocu is not sponsored or endorsed by any college or university Downloaded by JULIANNE ANTONETTE ENDRACA ([email protected])  lOMoARcPSD|45663754 POWER PLANT ENGINEERING TERMINOLOGIES REVIEWER 1. Are used in generator leads, feeder circuits, auxiliary power circuits and field circuits a. Volmeters b. Ammeters c. Wattmeters d. Ground detectors 2. An instrument that determines the heating value of the fuel: a. Hydrometer b. Wattmeter c.Calorimeter d. Tachometer 3. An instrument designed to measure the rotational speed of a machine: a. Tachometer b. Governor c. Hydrometer d. Voltmeter 4. What air pressure is needed for air starting a diesel engine? a. 350 psi b. 150 psi c. 450 psi d. 250 psi 5. A device for determining the water level in the boiler: a. Gauge cock b. Separator c. Steam trap d. Fusible plug 6. An automatic device allows the passage of water but prevents the passage of steam: a. Blow by b. Separator c. Steam trap d. Gauge trap 7. A boiler in which the products of combustion passes through the tubes which is surrounded by water: a. Water tube boiler b. Fire tube boiler c. Feed water heater d. Furnace 8. The device in fuel system that mixes gasoline with air: a. Spark plug b. Cylinder c. Carburetor d. Exhaust and inlet valve 9. Use for determining the specific gravity of a solution: a. Calorimeter b. Tachometer c. Hydrometer d. Pyrometer 10. In steam turbine, it is made up of a shaft and a wheel to which are securely fastened blades or buckets: a. Rotor b. Exhaust fan c. Generator d. Turbine blade fan 11. The amount of heat liberated by the complete combustion of a unit mass or volume of fuel: a. Heating value b. Heat rejected c. Heat transfer d. Heat absorbed 12. It is the temperature at which a substance start changing its states from liquid to gaseous at a given pressure: a. Dew point temperature b. Saturation temperature Downloaded by JULIANNE ANTONETTE ENDRACA ([email protected])  lOMoARcPSD|45663754 c. Boiling point d. Dry bulb temperature 13. The chemical formula for butane is: a. C2H5CI b. C6H16 c. C3H8 d. C4H10 14. The part of boiler design for burning fuel: a. Furnace b. Blow by c. Fusible plug d. Gauge cock 15. A device that changes electric current from high to low voltage: a. Wattmeter b. Transformer c. Ammeter d. Fusible plug 16. Power may be expressed in units of: a. ft-lbs b. Btu/hr c. Hp-hours d. kW-hours 17. Represents the enthalpy and entropy diagram: a. Mollier chart b. Organization cha c. Steam table d. P-h chart 18. Invented the compression-ignition engine: a. James watt b. Gabriel Fahrenheit c. Rudolf Diesel d. Nicholas Otto 19. A generator driven by a turbine: a. Engine b. Turbo fan jet engine c. Steam turbine d. Turbo generator 20. An instrument for measuring force or power: a. Viscosimeter b. Weighing scale c. Calorimeter d. Dynamometer 21. Another type of prime mover in which the combustion of fuel occur within the engine cylinder and the product of combustion serves as the thermodynamic fluid: a. External combustion engine b. Heat engine b. Spark-ignition engine d. Internal combustion engine 22. A type of internal combustion engine which utilizes the compressed hot air to ignite fuel inside the engine cylinder: a. Compression ignition engine b. Spark ignition engine c. Heat engine d. External combustion engine 23. A valve designed to open and release liquids at a certain pressure: a. Relief valve b. Service valve c. Exhaust valve d. Flapper valve 24. Is the energy chargeable per unit of work or the rate of energy chargeable per unit of power: a. Heat rate b. Combined heat rate c. Steam heat rate d. Mass flow rate Downloaded by JULIANNE ANTONETTE ENDRACA ([email protected])  lOMoARcPSD|45663754 25. Is an instrument in which revolution counter and stop watch are mounted in one frame and arranged to operate simultaneously: a. Hand counters b. Tachoscope c. Direct geared counter d. Cyclometer type counter 26. Is the energy chargeable per unit of work or the rate of energy chargeable per unit of power: a. Heat rate b. Combined heat rate c. Steam heat rate d. Mass flow rate 27. Is the work done by the steam during a reversible adiabatic expansion process in the turbine: a. Brake work b. Combined work c. Actual fluid work d. Ideal work 28. Ideal prototype of spark-ignition engines: a. Otto cycle b. Diesel cycle c. Dual combustion cycle d. None of the above 29. An instrument which in one case contains the secondary elements required to determine the major items of operating information needed by the steam generator. a. Smoke meter b. Boiler meter c. Calorimeter d. Hygrometer 30. The product of the displacement of the body and the component of the force in the direction of the displacement: a. Flow work b. Work c. Heat d. Nonflow work 31. The engine cycle containing two adiabatic and two isothermal processes: a. Rankine cycle b. Otto cycle c. Carnot cycle d. Diesel cycle 32. The ratio of the sum of individual maximum demands of the system to the overall maximum demand of the whole system: a. Demand factor b. Power factor c. Diversity factor d. Load factor 33. Used to measure the composition of exhaust gases from a furnace or engine: a. Orsat apparatus b. Hygrometer c. Tachometer d. Calorimeter 34. Barograph is an instrument used to measure the _______ of air: a. Velocity b. Volume flow c. Mass flow d. Pressure 35. The ratio of the kw-hr generated to the product of the capacity of the plant in kw to the number of hours the plant has been in actual use: a. Capacity factor b. Utilization factor c. Use factor d. Load factor Downloaded by JULIANNE ANTONETTE ENDRACA ([email protected])  lOMoARcPSD|45663754 36. Average pressure on a system when a changing pressure condition exist: a. Partial pressure b. Pressure drop c. Mean effective pressure d. Back pressure 37. Which of the following state is correct? The relative humidity of an air-water vapor mixture: a. is equal to the mole fraction of the water vapor in the mixture at the mixture temperature b. is the ratio of the partial pressure of the water vapor to the partial pressure of the air c. is the ratio of the partial pressure of the water vapor to the saturation pressure at the mixture temperature d. indicates the mass of water vapor in the mixture 38. Cp = Cv + R applies to : a. Two phase state b. All pure substance c. Enthalpy d. Ideal gas 39. The heat required per unit mass per degree change in temperature is: a. Heat of fusion b. Heat of vaporation c. Specific heat d. Latent heat 40. The temperature to which the air must be cooled at constant pressure to produce saturation of its moisture content: a. Boiling point b. Critical point c. Triple point d. Dew point 41. If a gas is expanded isothermally in a cylinder: a. No work is done b. It must have been completely insulated c. Heat must have been abstracted to make the process possible d. Heat must have been added during the process 42. Which of the following is not a viscosity rating: a. Centistoke b. API c. SSU d. Redwood 43. The indicator used to determine the anti-knock characteristic of gasoline engine: a. Cetane b. Aniline point c. Octane d. Neutralization number 44. Which of the following results to ill-effects when boiler water is untreated: a. Pitting b. Embrittlement c. Foaming d. All of these Downloaded by JULIANNE ANTONETTE ENDRACA ([email protected])  lOMoARcPSD|45663754 45. A temperature at which when oil is subjected to cooling still capable to flow: a. Solid point b. Pour point b. Cloud point d. Critical point 46. Temperature at which an oil gives off vapors in such that mixed with air form an inflammable mixture: a. Fire point b. Pour point c. Flash point d. Combustion point 47. It consists of a wet and dry bulb thermometer mounted on strip of metal and provided with a handle which permits the thermometer to be rapidly whirled through the air: a. Natural circulation b. Sling psychrometer c. Calorimeter d. Hydrometer 48. Is the condition of pressure and temperature at which a liquid and its vapor are indistinguishable: a. Triple point b. Dew point c. Critical point d. None of these 49. States that a heat engine cannot transfer heat from a body to another at higher temperature unless external energy is supplies to the engine: a. Plank’s Law b. First Law of Thermodynamic c. 2nd law of Thermodynamics d. 3rd Law of Thermodynamics 50. In a power piping system, the violet color corresponds to the fluid listed below: a. Water b. Steam c. Air d. Acids 51. The final power developed or delivered by/to the equipment is: a. Brake power b. Combined power c. Indicated power d. Friction power 52. When droplets of water are carried by steam in the boiler: a. Priming b. Carry over c. Foaming d. Embrittlement 53. In a condensing steam engine: a. Condensed steam is supplied b. Steam condenses inside cylinder c. Steam condenses as soon as it leaves the cylinder d. Exhaust steam is condensed in condenser 54. A turbocharger is a part of: a. Thermal power plant b. Diesel engine power plant d. Nuclear power plant d. Hydro-electric power plant 55. Select the plant that has least pollution problem? Downloaded by JULIANNE ANTONETTE ENDRACA ([email protected])  lOMoARcPSD|45663754 a. Steam power plant b. Gas turbine power plant c. Nuclear power plant d. Hydro-electric power plant 56. Select the power plant can be installed within the shortest time: a. Nuclear power plant b. Hydro-electric power plant c. Gas turbine power plant d. Diesel power plant 57. Morse test is conducted on: a. Single cylinder engines b. Multi cylinder engines c. Vee engines d. Horizontal engines 58. A draft tube is a part of which power plants? a. Diesel engine power plant b. Gas turbine power plant c. Steam power plant d. Hydro-electric power plant 59. A regenerator in a gas turbine: a. Reduces heat loss during exhaust b. Allows use of higher compression ratio c. Improves thermal efficiency d. Allows use of fuels of inferior quality 60. Flash point for diesel fuel oil should be: a. Minimum 49°C b. Maximum 49°C b. Maximum 200°C d. Maximum 300°C 61. Hot spots are: a. The hottest spots in engines b. The spots where heavier functions of fuel are vaporised c. Defects in S.I. in engines d. Hottest point within engine cylinder 62.. Stoichiometric ratio is: a. Chemically correct air-fuel ratio by volume b. Chemically correct air-fuel ratio by weight c. Theoritical mixture of air for complete combustion d. Actual ratio of air to fuel for maximum efficiency 63. Piston rings are made of : a. Alloy steel b. Carbon steel c. Copper d. Cast iron 64. An Orsat apparatus is used for: a. Volumetric analysis of the flue gas b. Gravimetric analysis of the flue gases c. Smoke density analysis of the flue gases d. All of the above 65.. Detonation of pinging noise is due to: Downloaded by JULIANNE ANTONETTE ENDRACA ([email protected])  lOMoARcPSD|45663754 a. Early timing of fuel injection b. Late timing of fuel injection c.. Head of piston carbonized d. Valve springs weak or broken 66. Loss of power is due to: a. Poor compression b. Restricted exhaust c. Clogging of air cleaner d. Low injection pressure 67. The thermal efficiency of a dual cycle engine with fixed compression ratio and fixed quantity of heat and with increase in pressure ratio, will: a. Increase b. Remain same c. Decrease d. Depends on other factor 68. Scavenging efficiency of a four stroke diesel engine is: a. In the range 80-95 per cent b. In the range 60-80 per cent c. Below 60 per cent d. Between 95% and 100% 69. Volumetric efficiency of a well designed engine may be in the range: a. 75 to 90 per cent b. 60 to 75 per cent c. 30 to 50 per cent d. below 30 per cent 70. Flash point of a liquids is the temperature at which: a. The fuel emits vapors at a rate which produces an inflammable mixture with air b. The fuel spontaneously ignites c. The fuel ignites with clearly visible flash d. The fuel ignites without a spark 71. Vapor lock is: a. Lock of vaporization of fuel to atmospheric pressure b. Excess fuel supply to engine because of faster evaporation c. Complete or partial stoppage of fuel supply because of vaporization of fuel in supply steam d. Locking carburetor jets because of vapor pressure 72. Select the plant that is suitable for peak load: a. Diesel engine plant b. Steam power plant c. Nuclear power plant d. All of the above 73. During idling in a compression ignition engine the air fuel ratio may be of the order of: a. 30 b. 200 c. 150 d. 100 74.. Prony brake is used for testing of: Downloaded by JULIANNE ANTONETTE ENDRACA ([email protected])  lOMoARcPSD|45663754 a. Small engines b. Large engines c. Engines having small flywheel d. High speed engines 75. Total sulphur content in a diesel fuel oil must not exceed: a. 0.1% b. 0.5% c. 0.2% d. 0.15% 76. On which does the working pressure of a boiler does not depend: a. Tensile strength of shell b. Thickness of shell c. Efficiency of joint d. Type of fuel being fired 77. On which factor bursting pressure of boiler does not depend: a. Tensile strength of the shell b. Thickness of the shell c. Diameter of the shell d. Shear strength of shell material 76.. In power station practice "spinning reverse" is a. Reverse generating capacity that is in operation but not in service b. Reserve generating capacity that is connected to bus and ready to take load c. Reserve generating capacity that is available for service but not in operation d. Capacity of the part of plant that remains under maintenance 77.. Load curve refers to the plot of: a. Load versus generating capacity b. Load versus current c. Load versus time d. Load versus cost of power 78. Tidal power is the power generated from: a. Waves of the ocean b. Rise and fall tides c. Thermal energy of ocean water d. Raw sea water 79.. Total solid impurities in feed water for a boiler depend upon: a. Boiler pressure b. Quantity of steam to be generated c. Type of fuel available d. Quantity of steam 80. Diesel engine fuels are rated by: a. CFR number b. Cetane number c. Octane number d. Calorific value 81. The piston is said to be at top dead center when it has move to a position where the cylinder volume is : a. Maximum b. Minimum c. Does not change d. Can either one Downloaded by JULIANNE ANTONETTE ENDRACA ([email protected])  lOMoARcPSD|45663754 82. It is a quantity of heat equal to 100 000 Btu: a. BTU b. Thermic c. Therm d. Calorie 83. The number of molecules in 22.4 liters (under standard conditions) of a substance in its gaseous state is called : a. Dulong's number b. Petit's number c. Avogadro's number d. Gay-Lussac number 84. Used to produce distilled water for boiler feed is : a. Evaporator b. Economizer c. Dearators d. Heater 85. In pumped storage plant: a. Power is produced by pumps b. Water is stored by pumping to high pressures c. Water is recirculated through turbines d. Downstream water is pumped upstream during offload periods 86. A turbine with steam discharging from moving nozzles is : a. Impulse turbine b. Reaction turbine c. Kaplan turbine d. None of the above 87. Standard air when use in combustion contains nitrogen by volume equivalent to: a. 78.16% b. 79.0% c. 76.8% d. 100% 88. Fuel plus (+) oxidizer in combustion is called : a. Products b. Reactants c. Can either one d. Flame temperature 89. In the ordinary commercial steam turbine, the change in enthalpy of the steam as it passes through the reaction section: a. Occurs almost entirely in the nozzles of the turbine b. Occurs almost entirely in the turbine blading c. Is due to the condensation of the steam d. Is negligible 90. Greenhouse effect is caused by the existence of : a. SO2 b. CO2 c. H2S d. CO 91.. In nuclear power plants when steam for the turbine is generated directly in the upper region of the reaction core area is : a. Pressurized water reactor b. Gas cooled reactor c. Boiling water reactor d. Liquid metal fast breeder reactor 92. It indicates the relation between total steam per hour and the load : Downloaded by JULIANNE ANTONETTE ENDRACA ([email protected])  lOMoARcPSD|45663754 a. State line b. Front-line c. Willan's Line d. Pressure line 93. The only type of boiler suited to supercritical pressure operation because the latent heat of evaporization at and beyond the critical pressure is zero is : a. Water tube boilers b. Fire tube boilers c. Once through boilers d. Controlled-circulation boilers 94. The permissible pH value of water for boilers as follows : a. 1 b. 5 c. 7 d. slightly more than 7 95. That portion of the steam generator where saturated liquid is converted to saturated steam is : a. Steam generation b. Boiler c. Superheater d. Economizer 96. A turbine which exhausts to a pressure greater than atmospheric is : a. Back pressure turbine b. Extraction turbine c. Non extraction turbine d. None of these 97. The ratio of the change in temperature to the change in pressure when a gas is throttled is : a. Joule coefficient b. Thoma coefficient c. Coefficient of restitution d. Joule-Thompson coefficient 98. The heat exchanger that raises the temperature of the water leaving the highest pressure feedwater heater to the saturation temperature corresponding to the boiler pressure is : a. Heater b. Atemperator c. Economizer d. Dearator 99. The reserve generating capacity in operation but not in service : a. Spinning reserve b. Hot reserve c. Cold reserve d. Cash reserve 100. A simultaneously generation of electricity and steam (or heat) in a single power plant: a. Waste heat recovery b. Gas turbine recovery c. Cogeneration d. Steam turbine-gas turbine plant Downloaded by JULIANNE ANTONETTE ENDRACA ([email protected])