A. 200-400 kcal/kg
B. 800-1200 kcal/kg
C. 2000-4000 kcal/kg
D. 5000-8000 kcal/kg
E. 8000-10,000 kcal/kg
Related Mcqs:
- Which of the following gases has the highest calorific value ________________?
A. producer gas
B. coal gas
C. water gas
D. blast furnace gas
E. coke oven gas - The average calorific value of wood is about : __________?
A. 33500 kj/kg
B. 25000 kj/kg
C. 23000 kj/kg
D. 19700 kj/kgSubmitted by: Faheem Zaman Dhaunroo
- The coal requirement per kW hour generation in the thermal power plant is of the order of__________________?
A. 0.1 to 0.2 kg
B. 0.2 to 0.4 kg
C. 0.6 to 0.8 kg
D. 1.0 to 1.5 kg
E. 1.5 to 2 kg - Green coal, in order to be burnt, must be____________________?
A. heated sufficiently
B. burnt in excess air
C. heated to its ignition point
D. burnt as powder
E. burnt as lumps - Which of the following coals has the highest calorific value_________________?
A. anthracite coal
B. bituminous coal
C. lignite
D. peat
E. wood - During storage, the heating value of coal __________________?
A. increases
B. decreases
C. remains constant
D. may increase or decrease depending upon the method of storage
E. none of the above - The economizer is used in boilers to _______________________?
A. increase thermal efficiency of boiler
B. economise on fuel
C. extract heat from the exhaust flue gases
D. increase flue gas temperature
E. to heat feed water by bled steam - Water and sediment in fuel oil can be removed by _______________________?
A. heating the oil in the settling tanks
B. cooling the oil in the settling tanks
C. burning the oil
D. suspension
E. filtering - Maximum energy loss in a boiler occurs due to _______________________?
A. unburnt carbon in ash
B. incomplete combustion
C. ash content
D. flue gases
E. radiation losses - Film boling occurs at _______________________?
A. very low pressure
B. atmospheric pressures
C. medium pressures
D. very high pressures
E. none of the above
