Ignition System MCQs

Automobile Engineering Objective Questions

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1. The process of igniting fuel by heat of compression is called?

A. Cooling ignition method

B. Compression ignition method

C. Compression initial method

D. Specific gravity method

2. Which of the following factors spark creating voltage does not depend on?

A. The gap and polarity

C. Plug insulation

D. Engine speed

3. The hot plugs runs hotter than cold plugs because

A. They are located near radiator

B. They are not insulated

C. They have long insulator and hence they have longer path of heat dissipation

D. They have short insulator and hence they have shorter path of heat dissipation

4. The following is (are) the advantage(s) of Electronic Ignition system

A. Produces maximum output voltage

B. Better starting with cold engine

C. Less possibility of arcing at spark plug

D. All of the above

5. Which of the following is the wrong statement?

A. In the exhaust, retarded timing causes burning of the hydrocarbons

B. The retarded timing improves fuel economy

C. The retarded timing requires the small opening for correct burning of the fuel

D. The exhaust gas temperature becomes higher due to retarded time

6. The following affect the voltage required to jump over the gap of spark plug

A. Shape of electrode forming gap

B. The conductivity of gases in the gap

C. Fuel. air mixture ratio existing in the gap

D. All of the above

7. Which among the following is provided in a vacuum advance type to keep the advance unit at zero if no vacuum is applied as during idling?

C. Centrifugal weights

D. Return spring

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