How can the center electrode make concerning earth to increase the plug life?

Spark plug gaps are required in the range of

A. 0.02 to 0.6 mm

B. 0.45 to 1.00 mm

C. 0.90 to 2.00 mm

D. 1.00 to 1.30 mm

What is the dwell time?

A. It is the time for which the contact breaker points remain closed

B. It is the time for which the contact breaker points remain open

C. The time during which inlet and exhaust valves open

D. The time during which inlet and exhaust valves close

Preignition can be caused due to presence of . . . . . . . .

A. Excess lubricants in cylinder

B. Gum in fuel

C. Over-heated spark plug

D. Higher volume of air in air fuel mixture

A signal generator in transistorized ignition system consist of

A. Ignition coil, permanent magnet and electronic control unit

B. A signal rotor, permanent magnet and electronic control unit

C. A signal rotor, a pick up coil and electronic control unit

D. A signal rotor, a pick up coil and a permanent magnet