Mechanical Engineering MCQs

A. 100%
B. 50%
C. 5%
C. 30%

A. 2%
B. 4%
C. 8%
D. ±4%

A. Give lot of smoke
B. Detonate
C. Knock
D. Not run

A. About twice
B. About 0.5 times
C. Nearly equal
D. About 1.7 times

A. S.i. engine
B. C.i. engine
C. Both are equally good
D. Multicylinder engine

A. Increases
B. Decreases
C. Remains unaffected
D. Depends on other factors

A. The shape and layout of the piston crown, the inlet port, and the valve produce the turbulent effect on 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. Fuel is injected at atmospheric pres¬sure

A. S.i. engine
B. C.i. engine
C. Two stroke engine
D. Four stroke engine

A. gas engine
B. 2-stroke s.i. engine
C. 4-stroke s.i. engine
D. steam engine

A. Increase the knocking tendency
B. Decrease the knocking tendency
C. Not affect the knocking tendency
D. Increase or decrease knocking tendency depending on strength and time of spark