Steam Boilers, Engines, Nozzles & Turbines MCQ Question with Answer

Steam Boilers, Engines, Nozzles & Turbines MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

Question No : 29
The pressure of steam in the engine cylinder at the beginning of the stroke is ________ the boiler pressure.

Equal to

Less than

Higher than

None of these

Question No : 30
The velocity of whirl at outlet for an axial discharge turbine is

Minimum

Maximum

Zero

None of these

Question No : 31
The critical pressure ratio for gases is

0.528

0.546

0.577

0.582

Question No : 32
Steam in water tube boiler as compared to fire tube boiler

Can be raised rapidly

Is raised at slower rate

Is raised at same rate

Could be raised at fast/slow rate depending on design

Question No : 33
The function of injector used in small steam plants is to

Create vacuum in furnace

Create vacuum at turbine exhaust

Pump feed water

Dose chemicals in feed water

Question No : 34
The diameter of tubes for natural circulation boiler as compared to controlled circulation boilers is

Less

Same

Could be more or less depending on other factors

Question No : 35
One kg of steam sample contains 0.8 kg dry steam; Its dryness fraction is

0.2

0.8

1.0

0.6