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

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

A. Equal to unity

B. Less than unity

C. Greater than unity

D. None of these

A. Very low pressure

B. Atmospheric pressures

C. Medium pressures

D. Very high pressures

A. Remains constant

B. Increases

C. Decreases

D. Behaves unpredictably

A. Heating the oil in the settling tanks

B. Cooling the oil in the settling tanks

C. Burning the oil

D. Suspension

A. 78-81%

B. 81-85%

C. 85-90%

D. 90-95%

A. Zero

B. One

C. Two

D. Four

A. Stationary fire tube boiler

B. Internally fired boiler

C. Horizontal boiler

D. All of these

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

A. Increases

B. Decreases

C. Remains constant

D. None of these