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 : 8
Over fire burning is the phenomenon of

Supply of excess, air

Supply of excess coal

Burning CO and unburnts in upper zone of furnace by supplying more air

Fuel bed firing

Question No : 9
The diagram factor is the ratio of the

Area of the actual indicator diagram to the area of theoretical indicator diagram

Actual workdone per stroke to the theoretical workdone per stroke

Actual mean effective pressure to the theoretical mean effective pressure

Any one of the above

Question No : 10
The fire tubes in a Cochran boiler usually have _________ diameter.

6.25 mm

62.5 mm

72.5 mm

92.5 mm

Question No : 11
The process of maintaining the speed of the turbine constant for various load conditions, is known as

Bleeding

Reheating

Governing

None of these

Question No : 12
In water wall furnace, the heat is transferred to the water walls by

Convection

Radiation

Conduction

Radiation and conduction

Question No : 13
The heat loss in a boiler takes place in the form of

Heat carried away by flue gases

Heat carried away by ash

Moisture present in fuel and steam formed by combustion of hydrogen in fuel

All of the above

Question No : 14
Water at pressure of 4 kg/cm² and 160°C temperature when exposed to atmosphere will

Boil

Flash i.e. get converted into steam

Remain as it was

Cool down