The relative heat absorption for successively added equal areas of boiler convection heating surfaces____________________?

A. Increases
B. Decreases
C. Remains unaffected
D. First increases and then decreases

The steam temperature with increase in load in case of a boiler fitted with radiation super heater________________?

A. Increases
B. Decreases
C. Remains unaffected
D. First increases and then decreases

Maximum energy loss in a boiler occurs due to _______________________?

A. Unburnt carbon in ash
B. Incomplete combustion
C. Ash content
D. Flue gases

A supercritical boiler is one that operates above the pressure and temperature of following values_____________________?

A. 100 kg/cm2 and 540°c
B. 1 kg/cm2 and 100°c
C. 218 kg/cm2 abs and 373°c
D. 218 kg/cm2 abs and 540°c

The balanced draft furnace is one using _________________________?

A. Induced draft fan and chimney
B. Induced draft fan and forced draft fan
C. Forced draft fan and chimney
D. Any one of the above

Evaporative capacity of boiler is expressed as____________________?

A. Kg of steam produced
B. Steam pressure produced
C. Kg of fuel fired
D. Kg of steam produced per kg of fuel fifed

Incomplete combustion can be best judged by__________________?

A. Smoky chimney exit
B. Excess air in flue gases
C. Measuring carbon mono-oxide in flue gases
D. Measuring temperature of flue gases at exit of furnace

Pulverized fuel is used for___________________?

A. Better burning
B. More calorific value
C. Less radiation loss
D. Medium sized units

Heating value of fuel used is as on fired basis. If it is reported for dry or moisture free fuel, then latter should be multiplied by the following factor to correct for as fired value ___________________?

A. (1- mositure content)
B. (1 + mositure content)
C. 1 + mositure content
D. 1 – mositure content

Tertiary air is the air used to____________________?

A. provide air around burners for obtaining optimum combustion
B. transport and dry the coal
C. cool the scanners
D. supply air for ignitors