Basic Mechanical Engineering (3110006) MCQs

MCQs of Internal Combustion Engines

Showing 21 to 30 out of 47 Questions
1 2 3 4 5
21.
A two-stroke engine has
(a) inlet and exhaust valves
(b) inlet and exhaust ports
(c) inlet, exhaust and transfer ports
(d) all of the above
Answer:

Option (c)

22.
In the two-stroke engine, the process of replacing the exhaust gas in a cylinder with the fresh air/fuel mixture is known as
(a) scavenging
(b) compression
(c) suction
(d) exhaust
Answer:

Option (a)

23.
Diesel engine is
(a) mixed ignition engine
(b) spark ignition engine
(c) compression ignition engine
(d) all of the above
Answer:

Option (c)

24.
Generally, the diesel engine is
(a) high-speed engine
(b) low to medium speed engine
(c) maybe high speed or low-speed engine
(d) all of the above
Answer:

Option (b)

25.
In which engine spark plug is not there?
(a) Petrol engine
(b) Gas engine
(c) Diesel engine
(d) None of the above
Answer:

Option (c)

26.
During suction stroke in a diesel engine, it draws in
(a) a vapour of diesel only
(b) a mixture of diesel and air
(c) a mixture of petrol and air
(d) an air only
Answer:

Option (d)

27.
In a diesel engine, the fuel is injected by
(a) spark plug
(b) injected fuel
(c) ignitor
(d) heat resulting from compression air that is supplied from combustion
Answer:

Option (d)

28.
The compression ratio for a diesel engine usually lies in the range of
(a) 14:1 to 20:1
(b) 6:1 to 10:1
(c) 12:1 to 15:1
(d) 10:1 to 12:1
Answer:

Option (a)

29.
In modern C.I. engine, the heat converted into the brake power varies between
(a) 50% to 60%
(b) 25% to 35%
(c) 10% to20%
(d) 60% to 70%
Answer:

Option (b)

30.
The thermal efficiency is more for
(a) steam engine
(b) two-stroke petrol engine
(c) four-stroke petrol engine
(d) all of the above
Answer:

Option (c)

Showing 21 to 30 out of 47 Questions
1 2 3 4 5