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

A. The ratio of heat actually used in producing the steam to the heat liberated in the furnace

B. The amount of water evaporated or steam produced in kg per kg of fuel burnt

C. The amount of water evaporated from and at 100°C into dry and saturated steam

D. The evaporation of 15.653 kg of water per hour from and at 100°C

A. The efficient steam jacketing of the cylinder walls

B. Superheating the steam supplied to the engine cylinder

C. Keeping the expansion ratio small in each cylinder

D. All of the above

A. Corrosion

B. Scale

C. Carryover

D. All of the above

A. Gravimetric analysis of the flue gases

B. Volumetric analysis of the flue gases

C. Mass flow of the flue gases

D. Measuring smoke density of flue gases

A. Increases steam pressure

B. Increases steam flow

C. Decreases fuel consumption

D. Decreases steam pressure

A. Economizer

B. Fusible plug

C. Superheater

D. Stop valve

A. Inherent moisture and surface moisture are different things

B. In some coals moisture may be present up to 40%

C. Some moisture in coal helps in better burning which is not possible with completely dry coal

D. It increases thermal efficiency

A. 47.5 mm, 130 mm

B. 32.5 mm, 180 mm

C. 65.5 mm, 210 mm

D. 24.5 mm, 65 mm

A. 1.5 m, 4 m

B. 1.5 m, 6 m

C. 1 m, 4 m

D. 2 m, 4 m

A. 137 fire tubes and 44 superheated tubes

B. 147 fire tubes and 34 superheated tubes

C. 157 fire tubes and 24 superheated tubes

D. 167 fire tubes and 14 superheated tubes