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A. heated sufficiently
B. burnt in excess air
C. heated to its ignition point
D. burnt as powder
Answer
C. heated to its ignition point
Submitted by: Imdad Shahani
Mechanical Engineering Mcqs
Sulphur in coal results in?
A. causing clinkering and slagging
B. corroding air heaters
C. spontaneous combustion during coal storage
D. all of the above
Answer
D. all of the above
Submitted by: Imdad Shahani
The behaviour of coal in a furnace is determained by?
A. the content of sulphur
B. the content of ash and heating value
C. the proximate analysis
D. the exact analysis
Answer
C. the proximate analysis
Submitted by: Imdad Shahani
Pour point of fuel oil is the?
A. lowest temperature at which oil will flow under set condition
B. storage temperature
C. temperature at which fuel is pumped through burners
D. temperature at which oil is transported
Answer
A.
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Gusset stays in a boiler are provided to____________________?
A. prevent the bulging of flat surfaces
B. avoid explosion in furnace
C. prevent leakage of hot flue gases
D. support furnace freely from top
Answer
A. prevent the bulging of flat surfaces
Submitted by: Imdad Shahani
Sulphur content of fuels is very important to the plant operators because it?
A. has high heating value
B. retards electric precipitation
C. promotes complete combustion
D. has highly corrosive effect
Answer
D. has highly corrosive effect
Submitted by: Imdad Shahani
An economiser in a boiler?
A. increases steam pressure
B. increases steam flow
C. decreases fuel consumption
D. decreases steam pressure
Answer
C. decreases fuel consumption
Submitted by: Imdad Shahani
Ultimate analysis of fuel is determination of percentage of?
A. carbon, hydrogen, nitrogen, sulphur, moisture
B. fixed carbon, ash, volatile matter, moisture
C. higher calorific value
B. lower calorific value
Answer
A.
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Which device is used in thermal power plants to reduce level of pollution?
A. induced draft fan
B. smoke meter
C. chimney
D. precipitator
Answer
D. precipitator
Submitted by: Imdad Shahani
In locomotives, the draught is produced by?
A. chimney
B. induced draft fan
C. both combined A. and B.
D. steam jet draught
Answer
D. steam jet draught
Submitted by: Imdad Shahani