Power Plant Questions and Answers – Superheaters, Reheaters and Steam Generator Control

This set of Power Plant Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Superheaters, Reheaters and Steam Generator Control”.

1. Which of the following is a water tube boiler?
a) Lancashire boiler
b) Cochran boiler
c) Babcock & Wilcox boiler
d) Locomotive boiler
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2. The number of fire tubes in a Cochran boiler are ___________
a) 75
b) 165
c) 225
d) 175
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3. The chimney draught varies with?
a) climatic conditions
b) temperature of furnace gases
c) height of chimney
d) all of the mentioned
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4. The diagram factor is the ratio of ___________
a) area of actual indicator diagram to the area of theoretical indicator diagram
b) actual work done per stroke to the theoretical work done per stroke
c) actual mean effective pressure to the theoretical mean effective pressure
d) any of the above mentioned
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5. The diameter of a cylindrical shell of a Scotch marine boiler varies from ___________
a) 3.5 to 4.5m
b) 1.5 to 2m
c) 2.5 to 3.5m
d) none of the mentioned
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6. A closed vessel made of steel & used for the generation of steam is called a ___________
a) steam condenser
b) steam boiler
c) steam injector
d) steam turbine
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7. Lancashire boiler has _____ internal flue tubes.
a) 1
b) 3
c) 2
d) 4
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8. Locomotive boiler is a ___________
a) single tube, vertical, externally fired & stationary boiler
b) single tube, horizontal, internally fired& stationary boiler
c) multitubular, horizontal, externally fired & stationary boiler
d) multitubular, horizontal, internally fired & mobile boiler
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9. Cut-off ratio is the ratio of?
a) cut-off volume to clearance volume
b) clearance volume to cut-off volume
c) volume at cut-off to swept volume
d) swept volume to volume at cut-off
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10. The equivalent evaporation is defined as?
a) the ratio of heat actually used in producing the steam to the heat liberated in the furnace
b) the amount of water evaporated or steam produced in kg of fuel burnt
c) the amount of water evaporated from and at 100 degree C into dry & saturated steam
d) none of the mentioned
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11. The theoretical indicator diagram of a simple steam engine is based upon the assumption that ___________
a) there is no pressure drop due to condensation
b) steam is admitted at boiler pressure & exhausted at condenser pressure
c) the expansion of the steam is hyperbolic
d) all of the mentioned
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12. The actual power supplied by the engine crankshaft is called?
a) indicated power
b) frictional power
c) brake power
d) none of the mentioned
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13. When steam after doing work in the cylinder passes into a condenser, the engine is said to be a ___________
a) slow speed engine
b) vertical steam engine
c) condensing steam engine
d) no-condensing steam engine
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14. The missing quantity per stroke is equal to?
a) cylinder feed + indicated mass of steam
b) cylinder feed + indicated mass of steam
c) mass of cushion steam + indicated mass of steam
d) mass of cushion steam + cylinder feed
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15. An economiser is installed in a boiler primarily to ___________
a) increase steam pressure
b) reduce fuel consumption
c) superheat the steam
d) all of the mentioned
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Sanfoundry Global Education & Learning Series – Power Plant Engineering.

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