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

A. Constant volume

B. Constant temperature

C. Constant pressure

D. Constant entropy

A. Static

B. Dynamic

C. Static and dynamic

D. Neither static nor dynamic

A. Coking coal

B. Non-coking or free burning coal

C. Pulverized coal

D. High sulphur coal

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. It has heating value

B. It helps in electrostatic precipitation of ash in flue gases

C. It leads to corrosion of air heaters, ducting, etc. if flue gas exit temperature is low

D. It erodes furnace walls

A. Blow off cock

B. Feed check valve

C. Steam stop valve

D. None of these

A. 10 to 15%

B. 15 to 25%

C. 25 to 40%

D. 40 to 60%

A. To dry flue gases

B. In moisture present in the fuel

C. To steam formed by combustion of hydrogen per kg of fuel

D. All of the above

A. Centrifugal pump

B. Axial flow pump

C. Gear pump

D. Reciprocating pump

A. Cumulative heat drop to the isentropic heat drop

B. Isentropic heat drop to the heat supplied

C. Total useful heat drop to the total isentropic heat drop

D. None of the above