Explore topic-wise MCQs in Ic Engine.

This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Ic Engine knowledge and support exam preparation. Choose a topic below to get started.

1.

The knocking tendency in spark ignition engines can be decreased by adding dopes like tetra ethyl lead and ethylene dibromide.

A. True
B. False
Answer» B. False
Discussion
2.

The fuels in order of decreasing knock tendency for spark ignition engines are ___________

A. paraffins, aromatics, naphthenes
B. paraffins, naphthenes, aromatics
C. naphthenes, aromatics, paraffins
D. none of the mentioned
Answer» C. naphthenes, aromatics, paraffins
Discussion
3.

Which of the following is the anti-knock for compression ignition engines?

A. naphthene
B. tetra ethyl lead
C. amyl nitrate
D. hexadecane
Answer» D. hexadecane
Discussion
4.

A fuel of cetane number 40 has the same ignition quality as a mixture of ___________

A. 40% cetane and 60% alpha methyl naphthalene
B. 40% alpha methyl naphthalene and 60% cetane
C. 40% petrol and 60% diesel
D. 40% diesel and 60% petrol
Answer» B. 40% alpha methyl naphthalene and 60% cetane
Discussion
5.

A mixture containing 65% of iso-octane and 35% of normal heptane will have ___________

A. cetane number 65
B. octane number 65
C. cetane number 35
D. octane number 35
Answer» C. cetane number 35
Discussion
6.

What are the two reference fuels used for cetane rating?

A. cetane and iso-octane
B. cetane and alpha-methyl naphthalene
C. cetane and normal heptane
D. none of the mentioned
Answer» C. cetane and normal heptane
Discussion
7.

A fuel of an octane number rating of 75 matches in knocking intensity as a mixture of ___________

A. 75% iso-octane and 25% normal heptane
B. 75% normal heptane and 25% iso-octane
C. 75% petrol and 25% diesel
D. 75% diesel and 25% petrol
Answer» B. 75% normal heptane and 25% iso-octane
Discussion