Fuels and Combustion MCQs

469 MCQs  — Chemical Engineering MCQs  (Page 47 of 47)

Attempt Fuels and Combustion Quiz
Beehive coke oven________________?
A. Facilitates by-products recovery
B. Takes 2-3 days for coking of coal but requires no external fuel for heating
C. Gives larger yield of coke (around 85%) as compared to by-product ovens
D. Produces coke with very poor strength
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Coal is heated in presence of air to a temperature of about _______________ °C, while determining its ash content for proximate analysis?
A. 500
B. 750
C. 950
D. 1100
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Higher percentage of ash in coal meant for the production of metallurgical grade coke ___________________?
A. Decreases the hardness of coke
B. Decreases the abrasion resistance of coke
C. Causes brittleness in steel
D. None of these
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Eschka mixture, which is used for the determination of sulphur in coal, is a mixture of _____________________?
A. Mgo & na2co3
B. Mgso4 & bacl2
C. Baso4 & nacl
D. Mgco3 & nacl
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Ignition temperature of a fuel in air is ______________ that in pure oxygen?
A. More than
B. Less than
C. Equal to
D. Either more or less; depends on the type of fuel
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Which of the following gaseous fuels has the lowest calorific value ?
A. Gobar gas
B. Refinery gas
C. Converter gas
D. Blast furnace gas
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Turndown ratio of a gas burner is equal to the __________________ ?
A. Maximum to minimum heat input ratio
B. Maximum to minimum permissible gas flow rate
C. Both a. & b.
D. Minimum to maximum heat input ratio
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Which of the following has the least calorific value (kcal/Nm3) ?
A. Blast furnace gas
B. Coke oven gas
C. Sewage gas
D. Natural gas
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Carbon Content by weight in air dried wood may be about _______________ percent?
A. 10
B. 25
C. 50
D. 80
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Word of the Day
22 Jul
Combative
ready or eager to fight or argue.
لڑاکا، متنازع، جھگڑالو

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