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.Management Sciences
Category: I.C. Engines
Most high speed compression engines operate on __________________?
A. Diesel cycle
B. Otto cycle
C. Dual combustion cycle
D. Special type of air cycle
E. Carnot cycle
Scavenging air is supplied to a two-stroke engine at a density greater than that of atmosphere. This means the engine is__________________?
A. Supercharged
B. Not supercharged
C. Charged
D. Supercharged provided its speed is low
In precombustion chamber in diesel engine________________?
A. The shape and layout of the pistion crown, the inlet port, and the valve produce the turbulent effect of fuel mixture
B. Fuel is injected into an auxiliary chamber that is separated from the cylinder by an orifice or throat
C. Only a part of air charge is contained in an auxiliary chamber in which the fuel starts to burn with insufficient air which due to explosion tendency mixes thoroughly into main cylinder charge
D. There are no valves
The fuel air ratio in a petrol engine fitted with suction carburettor, operating with dirty air filter as compared to clean filter will be________________?
A. higher
B. lower
C. remain unaffected
D. unpredictable
E. none of the above
The following volume of air is required for consuming 1 liter of fuel by a four stroke engine_______________?
A. 1 m3
B. 5 m3
C. 5-6 m3
D. 9-10 m3
E. 15-18 m3
Supercharging is the process of_____________________?
A. supplying the intake of an engine with air at a density greater than the density of the surrounding atmosphere
B. providing forced cooling air
C. injecting excess fuel for raising more load
D. supplying compressed air to remove combustion products fully
E. raising exhaust pressure
The cooling water requirement for diesel engine is of the order of________________?
A. 0.2 to 1.0 liter per minute per h.p.
B. 1 to 3 liters per minute per h.p.
C. 5 to 10 liters per minute per h.p
D. 10 to 20 liters per minute per h.p.
E. 20-30 liters per minute per h.p
The specific fuel consumption per BH hour for a petrol engine is approximately__________________?
A. 0.15 kg
B. 0.2 kg
C. 0.25 kg
D. 0.3kg
E. 0.35 kg
Petrol is distilled at a temperature in range of__________________?
A. 30 – 65°C
B. 65 – 220°C
C. 220-350°C
D. 350-450°C
E. 450-550°C
If one cylinder of a diesel engine receives more fuel than the others, then for that cylinder the________________?
A. exhaust will be smoky
B. piston rings would stick into piston grooves
C. exhaust temperature will be high
D. engine starts overheating
E. scavenging occurs
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