Central Boiler Operation Engineer (BOE) Exam Question Set - 25
1. Which of the following type of fuel does not contain ash?
a) coal
b) fuel oil
c) natural gas
d) synthetic fuels
Ans.c
2. A coal containing high percentage of durian is called _________
a) splint
b) bright
c) boghead
d) non-banded
Ans. a
3. The gas which contributes maximum to heating value of natural gas is?
a) CO
b) CO2
c) H2
d) CH4
Ans. d
4. Low temperature carbonisation _________
a) produces less quantity of tar than high temperature carbonisation
b) is mainly producing smokeless domestic coke
c) is meant for production of ‘metallurgical coke’
d) produces higher temperature gas than high temperature carbonisation
Ans. b
5. Which of the following is not considered a type of coal according to ASTM?
a) anthracite
b) bituminous
c) peat
d) lignite
Ans. c
6. Which of the following is not directly determined in the Proximate Analysis of coal?
a) Volatile Matter
b) Fixed Carbon
c) Moisture
d) Ash
Ans. b
7. Which of these is not a component of coal in Ultimate Analysis?
a) carbon
b) sulphur
c) ash
d) phosphor
Ans. d
8. The design of steam generator greatly depends on __________
a) spontaneous combustion
b) sulphur content
c) ash softening temperature
d) heating value
Ans. c
9. Which of the following property is the inverse of the power required to grind coal to a particular size for burning?
a) heating value
b) weatherabillity
c) grindability
d) sulphur content
Ans. c
10. The extent of caking in coal is determined using __________
a) swelling index
b) grindability
c) weatherability
d) heating value
Ans. a
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