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.Management Sciences
Category: I.C. Engines
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
E. conserve heat
For maximum power generation, the air fuel ratio for a petrol engine for vehicles, is of the order of _________________?
A. 9 : 1
B. 12 : 1
C. 15 : 1
D. 18 : 1
E. 20: 1
Which is false statement about advantages of V-type engine_________________?
A. compact design requiring lesser space
B. improved distribution of air to cylinder
C. casting less liable to distortion
D. reduced torsional vibration because of shorter crankshaft
E. less overhead clearance
For the same size and weight, a two stroke engine as compared to four stroke engine will generate power_________________?
A. about twice
B. about 0.5 times
C. nearly equal
D. about 1.7 times
E. about 5 times
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.
E. 750000 cc per min. per h.p
Auto-ignition temperature is____________________?
A. minimum temperature to which oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame
B. temperature at which it solidifies or congeals
C. that at which it catches fire without external aid
D. indicated by 90% distillation temperature, i.e., when 90% of sample oil has distilled off
E. indicated by 50% distillation temperature
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