The safety valve on boiler drum compared to safety valve on super heater is set at ________________?

A. Same value
B. Higher value
C. Lower value
D. Lower/higher depending on steam flow

Gardually increasing temperature of flue gases at inlet to chimney for given steam outputs is an indication of__________________?

A. Higher effectiveness of boiler
B. High calorific value coal being burnt
C. Fouling of heat transfer surfaces
D. Raising of steam temperature

The three “Ts” for good combustion are____________________?

A. Temperature, time, and turbulance
B. Total air, true fuel, and turbulance
C. Thorough mixing, total air, and temperature
D. Total air, time, and temperature

Feed water conditioning in thermal power plants in done to__________________?

A. Reduce hardness and for removal of solids
B. Increase efficiency-of thermal power plant
C. Increase *heat transfer rate
D. Increase steam parameters

The capacity of induced draft fan compared to forced draft fan in a boiler is__________________?

A. Same
B. More
C. Less
D. Less or more depending on size of boiler

Calorific value of coal is of the order of _______________________?

A. 200-400 kcal/kg
B. 800-1200 kcal/kg
C. 2000-4000 kcal/kg
D. 5000-8000 kcal/kg

Boiler parameters are expressed by ___________________?

A. Tonnes/hr. of steam
B. Pressure of steam in kg/cm2
C. Temperature of steam in °c
D. All of the above

The condition of steam in boiler drum is always ___________________?

A. Dry
B. Wet
C. Saturated
D. Supersaturated

Overfire burning is the phenomenon of _____________________?

A. Supply of excess, air
B. Supply of excess coal
C. Burning co and unburnts in upper zone of furnace by supplying more air
D. Fuel bed firing

In ordetjo obtain superheated steam, a superheater is added in an existing boiler. As as result, furnace vacuum will _________________?

A. Remain unaffected
B. Improve c. worsen
C. May improve/worsen depending on size
D. Unpredictable