I C Engines Question Answer

Latest I C Engines Question Answer 2022 : Best Tricks for preparation of SSC, Railway, Police competitive exams, entrance test to prepare online Exam.

21. The theoretically correct air fuel ratio for petrol engine is of the order of

(A)  6 : 1

(B)  9 : 1

(C) 12 : 1

(D)  15 : 1

Ans. (D)  15 : 1

 

22. A diesel engine has

(A)  1 valve

(B)  2 valve

(B)   3 valve

(D)  4 valves

Ans. (B) 2 valve

 

23. Petrol is distilled at a temperature in range of

(A)  30 – 65C

(B)  65 – 220C

(C)  220 – 350C

(D) 350 – 450C

Ans. (B) 65 – 220C

 

24. Kerosene is distilled at

(A)  30 – 65C

(B) 65 – 220C

(C)  220 – 350C

(D) 350 – 450C

Ans. (C) 220 – 350C

 

25. Self – ignition temperature of petrol is of the order of

(A)  150C

(B)  240C

(C)  370C

(D) More than 500C

Ans. (D) More than 500C

 

i.c. engine I C Engines Question Answer mcq

 

26. The spark plug gap is normally maintained at

(A)   0.1 to 0.2 mm

(B)  0.2 to 0.4 mm

(C)   0.45 to 0.6 mm

(D)  0.6 to 0.8 mm

Ans. (C)  0.45 to 0.6 mm

            

27. The delay period in petrol engine is of the order of

(A)   0.001 sec

(B)  0.002 sec

(C)   0.01 sec

(D)  0.005 sec

Ans. (B) 0.002 sec

 

28. Piston rings are usually made of

(A)   Cast iron

(B)  Aluminium

(B)   Phosphor bronze

(D)  Babbitt

Ans. (A)   Cast iron

    

29. Calorific value of diesel oil is of the order of

(A)  3000 kcal /kg

(B)  5000 kcal/kg

(C)  7500 kcal/kg

(D) 10000 kcal /kg

Ans. (D) 10000 kcal /kg

 

30. The compression ratio of motor cars is

(A)  5

(B)  7

(C)  10

(D) 13

Ans. (B) 7

 


 

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