250+ TOP MCQs on Comparison of Two Stroke S.I. and C.I. Engines – 1 and Answers

IC Engines Multiple Choice Questions on “Comparison of Two Stroke S.I. and C.I. Engines – 1”.

1. Which of the following option is correct when diesel is compared to petrol?
a) highly ignitable
b) more difficult to ignite
c) less difficult to ignite
d) none of the mentioned
Answer: b
Clarification: None.

2. If the temperature of intake air in internal combustion engine increases, then its efficiency will __________
a) remain same
b) decrease
c) increase
d) none of the mentioned
Answer: b
Clarification: None.

3. If petrol is used in a diesel engine, then __________
a) low power will be produced
b) efficiency will be low
c) higher knocking will occur
d) black smoke will be produced
Answer: c
Clarification: Petrol is not used in diesel engine because if petrol is used in a diesel engine, then higher knocking will occur.

4. A petrol engine, during suction stroke draws __________
a) air only
b) petrol only
c) a mixture of petrol and air
d) none of the mentioned
Answer: c
Clarification: None.

5. In order to mix air and petrol in the required proportion and to supply it to the engine during suction stroke, then ____________ is employed.
a) fuel pump
b) injector
c) carburetor
d) none of the mentioned
Answer: c
Clarification: Carburetor is employed in order to mix air and petrol in the required proportion and to supply it to the engine during suction stroke.

6. A diesel engine, during suction stroke draws __________
a) air only
b) diesel only
c) a mixture of petrol and air
d) none of the mentioned
Answer: a
Clarification: In a diesel engine, during suction stroke only air is drawn.

7. The colour of exhaust from diesel engine is generally __________
a) white
b) bluish
c) black
d) violet
Answer: c
Clarification: None.

8. The pressure at the end of compression, in petrol engines, is approximately __________
a) 10 bar
b) 20 bar
c) 25 bar
d) 35 bar
Answer: a
Clarification: None.

9. A petrol engine has compression ratio from __________
a) 6 to 10
b) 10 to 15
c) 15 to 25
d) 25 to 40
Answer: a
Clarification: None.

10. The running cost of a petrol engine is ____________ that of a diesel engine.
a) higher than
b) lower than
c) equal to
d) none of the mentioned
Answer: a
Clarification: None.