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 : 15
The ratio of the temperature rise of cooling water to the vacuum temperature minus inlet cooling water temperature is called

Condenser efficiency

Vacuum efficiency

Nozzle efficiency

Boiler efficiency

Question No : 16
In a Tandem type compound engine, the high pressure and low pressure cylinders

Have common piston rod

Are set at 90°

Have separate piston rods

Are set in V-arrangement

Question No : 17
The variation of steam pressure in the nozzle depends upon

Velocity of steam

Specific volume of steam

Dryness fraction of steam

All of these

Question No : 18
The maximum discharge of steam through a convergent-divergent nozzle depends upon

Area of nozzle at throat

Initial pressure and volume of steam

Final pressure of steam leaving the nozzle

Both (A) and (B)

Question No : 19
A device used to increase the temperature of saturated steam without raising its pressure, is called

Blow off cock

Fusible plug

Superheater

Stop valve

Question No : 20
The stage efficiency (η_S) is given by (where η_B = Blading efficiency, and η_N = Nozzle efficiency)

η_S = η_B × η_N

η_S = η_B / η_N

η_S = η_N / η_B

None of these

Question No : 21
The dry saturated steam at very high pressure (150200 kg/cm²) when throttled to atmosphere will become

Wet

Superheated

Remain dry saturated

Dry