Mechanical Engineering MCQs

2075 MCQs  (Page 200 of 208)

Attempt Mechanical Engineering Mcqs Quiz
Exhaust pipes of engines are covered with insulating marterial in order to_________________?
A. Keep the exhaust pipes warm
B. Reduce formation of condenstae
C. Reduce heat transfer to the engine room
D. Increase engine efficiency
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Diesel engines as compared to petrol engines require ______________________?
A. Bigger flywheel
B. Smaller flywheel
C. Same size flywheel
D. No flywheel
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The system of lubrication used for motor cycles and scooters is by________________?
A. forced lubrication system
B. splash lubrication
C. applying grease under pressure
D. wet sump method
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The specific fuel consumption for a petrol engine first decreases with increase in fuel air ratio and then increases with further increase in fuel air ratio. The minimum value occurs in the range of__________________?
A. Lean mixture
B. Chemically correct mixture
C. Rich mixture
D. Unpredictable
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Air injection in I.C. engines refers to injection of___________________?
A. Air only
B. Liquid fuel only
C. Liquid fuel and air
D. Supercharging
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The ratio of useful power; engine friction exhaust gas losses; cooling water, air and oil losses for a diesel engine is of the order of____________________?
A. 5:25:30:50
B. 25:35:5:35
C. 25:5:10:60
D. 40:30:15:15
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With increase in speed of vehicle, the back pressure will________________?
A. Decrease
B. Increase
C. Remain unalfected
D. Depend on other factors
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A 4-stroke diesel engine needs about following amount of air_________________?
A. 75 cc per min. per h.p.
B. 750 cc per min. per h.p.
C. 7500 cc per min. per h.p.
D. 75000 cc per min. per h.p.
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The ash content in diesel oil should bot be more than_______________?
A. 1%
B. 5%
C. 0.1%
D. 0.01%
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Fuel consumption with increase in back pressure will________________?
A. Increase
B. Decrease
C. Remain unaffected
D. Depend on other factors
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Word of the Day
27 Sep
Undesirable
not wanted or desirable because harmful, objectionable, or unpleasant.
غیر مطلوب، ناروا، نامناسب

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