Steam Boilers, Engines, Nozzles And Turbines MCQ Questions & Answers

Steam Boilers, Engines, Nozzles And Turbines MCQ Questions & Answers | Mechanical Engineering

Learn Steam Boilers, Engines, Nozzles And Turbines MCQ questions & answers are available for a Mechanical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Steam Boilers, Engines, Nozzles And Turbines MCQ question is the important chapter for a Mechanical Engineering and GATE students. Page-4 section-2

Blow off cock in a boiler is used to

A) Control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required B) Empty the boiler when required and to discharge the mud, scale or sediments which are accumulated at the bottom of the boiler C) Put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit D) Increase the temperature of saturated steam without raising its pressure

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Answer & Solution

Answer: Option B

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The factor of evaporation for all boilers is always

A) Equal to unity B) Less than unity C) Greater than unity D) None of these

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Answer: Option C

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Film boiling occurs at

A) Very low pressure B) Atmospheric pressures C) Medium pressures D) Very high pressures

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Answer: Option D

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While steam expands in turbines, theoretically the entropy

A) Remains constant B) Increases C) Decreases D) Behaves unpredictably

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Answer: Option A

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Water and sediment in fuel oil can be removed by

A) Heating the oil in the settling tanks B) Cooling the oil in the settling tanks C) Burning the oil D) Suspension

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Answer: Option A

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The bituminous coal is no caking if its carbon content is

A) 78-81% B) 81-85% C) 85-90% D) 90-95%

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Answer: Option A

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The number of flue tubes in Lancashire boiler is

A) Zero B) One C) Two D) Four

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Answer: Option C

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Lancashire boiler is

A) Stationary fire tube boiler B) Internally fired boiler C) Horizontal boiler D) All of these

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Answer: Option D

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The heat loss in a boiler takes place in the form of

A) Heat carried away by flue gases B) Heat carried away by ash C) Moisture present in fuel and steam formed by combustion of hydrogen in fuel D) All of the above

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Answer: Option D

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The efficiency of the plant __________ with the mechanical draught.

A) Increases B) Decreases C) Remains constant D) None of these

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Answer & Solution

Answer: Option A

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