Mechanical Engineering MCQs

2075 MCQs  (Page 142 of 208)

Attempt Mechanical Engineering Mcqs Quiz
Which device is used in thermal power plants to reduce level of pollution___________________?
A. Induced draft fan
B. Smoke meter
C. Chimney
D. Precipitator
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Ultimate analysis of fuel is determination of percentage of____________________?
A. Carbon, hydrogen, nitrogen, sulphur, mositure
B. Fixed carbon, ash, volatile matter, mositure
C. Higher calorific value
B. Lower calorific value
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Spontaneous combustion is a phenomenon in which____________________?
A. All the fuel burns instantaneously producing high energy release
B. Fuel burns with less air
C. Coal bursts into flame without any external ignition source but by itself due to gradual increase in temperature as a result of heat released by combination of oxygen with coal
D. Explosion in furnace
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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
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An economiser in a boiler______________________?
A. Increases steam pressure
B. Increases steam flow
C. Decreases fuel consumption
D. Decreases steam pressure
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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
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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
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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
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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
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Sulphur in coal results in___________________?
A. causing clinkering and slagging
B. corroding air heaters
C. spontaneous combustion during coal storage
D. facilitating ash precipitation
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Word of the Day
28 Sep
Expatriate
a person who lives outside their native country.
ملک بدری، جلا وطن کرن، شہر بدر کرنا

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