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72.

73.

74.

75.

For automotive ignition system, match the followings :

1. spark plug gap a. 0.35 mm to 0.4 mm
2. contact breaker gap b. 0.60 mm to 1 mm
3. dwell angle for 4-cylinder engine c. 36° to 42°

4. dwell angle for 6-cylinder engine d. 48° to 52°

A) 2b, 3d, 4-0

B) , 2a, 3-d, 4-0

०) , 2a 3-०. 4-0

D) 2b, 3d, 4a

With details regarding the spark plug, match the followings :
1. Combustion chamber temperature a. above 750°C
2. Electrode temperature at which

pre-ignition occurs b. 2400°C to 2600°C
3. Electrode temperature at which

carbon or oil deposits c. 500°C to 600°C
4. Optimum electrode temperature d. below 300°C
A) 2-a, 3-0 4-0
8) 1-൭, 2-0, 3-0, 4-0
©) 1-8, 2-0, 3-0, 4d
൧) 1-൭, 2-0, 9-0, 4-6

Which of the following statement is/are correct ?

1. Flywheel magneto runs at the speed of camshaft.

2. Dwell meter is used to measure spark plug gap.

3. Feeler gauge or dwell meter is used to measure contact breaker gap.
4

. The maximum ignition advance by vacuum advance mechanism is 15 to 30
crankshaft degrees.

A) only 1 and 2 B) only 2and3

C) only 3 and 4 D) only 2 and 4

The types of coil winding used in the armature of generator are

A) star and lap winding B) wave and delta winding

C) star and delta winding D) lap and wave winding
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