Mechanical Engineering Mcqs

A. Maximum
B. Optimum
C. Poor
D. Constant

A. clearance volume
B. swept volume
C. compression ratio
D. volumetric efficiency
E. mean effective pressure

A. higher knocking will occur
B. efficiency will be low
C. low power will be produced
D. black smoke will be produced
E. lot of fuel will remain unburnt

A. the shape and layout of the piston 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
E. fuel is partly burnt by spark

A. Supercharged
B. Not supercharged
C. Charged
D. Supercharged provided its speed is low

A. suction port and exhaust port
B. transfer port only
C. suction port and transfer port
D. transfer port and exhaust port
E. suction port, exhaust port and transfer port

A. size of flywheel
B. weight of engine
C. type of lubrication system
D. absence of valves
E. location of fuel tank

A. Zero
B. 5-10%
C. Depends on load
D. Considerable percent

A. increase
B. decrease
C. remain unaffected
D. increase/decrease depending upon engine capacity
E. first increase and then decrease

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