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WorksheetsCOMBUSTION AND FLAME-1 KVFW VIIIA
Total questions: 10
Worksheet time: 5mins
Name
Class
Date
1.
Ignition temperature of a fuel in air is __________ that in pure oxygen.
a)
(A) More than
b)
(B) Less than
c)
(C) Equal to
d)
(D) Either more or less; depends on the type of fuel
2.
Which of the following fuel gases has the highest calorific value?
a)
(A) Natural gas
b)
(B) Coal bed methane (CBM)
c)
(C) Liquefied petroleum gas (LPG)
d)
(D) Sewage gas
3.
Which of the following is not a by-product fuel?
a)
(A) Producer gas
b)
(B) Blast furnace gas
c)
(C) Coke oven gas
d)
(D) Refinery gas
4.
A sooty flame can be made non-luminous by
a)
(A) Admitting more gas
b)
(B) Shutting gas supply
c)
(C) Admitting more air
d)
(D) Shutting air supply
5.
The gas which contributes maximum to the heating value of natural gas is
a)
CO
b)
CO2
c)
H2
d)
CH4
6.
Nitrogen in coal
a)
(A) Is present upto 1-2%
b)
(B) Comes from protein in parent vegetable matter
c)
(C) Is recovered as ammonia during its carbonization
d)
(D) All (a), (b) and (c
7.
Which of the following is the maximum coal producing state in India?
a)
ORISSA
b)
WEST BENGAL
c)
JHARKHAND
d)
ASSAM
8.
Bunsen burner is an example of a/an __________ burner.
a)
(A) Inside mixing/premix type
b)
(B) Outside mixing/diffusion flame/nozzle mix type
c)
(C) Rotary cup
d)
(D) Submerged combustion
9.
Combustion reaction of fuels is a/an __________ reaction.
a)
AUTOCATALYTIC
b)
EXOTHERMIC
c)
ENDOTHERMIC
d)
NONE OF THESE
10.
Incomplete combustion of fuel in a furnace is judged by high _____ of the flue gases.
a)
CO CONTENT
b)
DEW POINT
c)
CO2 CONTENT
d)
O2 CONTENT
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