Ignition System MCQ Questions & Answers

41

Choose the statement that correctly describes the ignition coil in the direct ignition system.

A) An ignition coil is built in each spark plug cap B) An ignition coil is installed on the cylinder head C) An ignition coil is installed on each cylinder bank D) Direct ignition system has no ignition coil

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Answer & Solution

Answer: Option A

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42

What is the correct range of gap size in the millimeter of a spark plug?

A) 0.35 - 0. 45 B) 0.6 - 0. 1 C) 1 - 2 D) 2 - 4

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Answer & Solution

Answer: Option B

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43

If the spark energy exceeds 40 mJ and the duration is longer than 0.5 ms, reliable ignition is obtained.

A) True B) False

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Answer & Solution

Answer: Option A

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44

If the engine is operating with richer mixtures the optimum spark timing must be . . . . . . . .

A) Constant B) Increased C) Retarded D) None of the mentioned

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Answer & Solution

Answer: Option C

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45

Which of the following statement describes the correct procedure to be implemented when the electrode gap of a platinum tipped electrode is out of specification?

A) The side electrode should be aligned by bending it with the screw driver or some other similar tool B) Gap adjustment should be performed by striking the side electrode with a hammer C) In cases where the gap is too narrow, adjustment should be performed by filing off a portion of the center electrode D) The plug should be replaced

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Answer & Solution

Answer: Option D

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46

What is the function of the ignition coil which is simply a transformer?

A) Step up the current B) Step down the current C) Step down the voltage D) Step up the voltage

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Answer & Solution

Answer: Option D

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47

Which of the following is not considered while deciding the optimum firing order of the engine?

A) Engine vibration B) Engine cooling C) Development of the backpressure D) Engine configuration

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Answer & Solution

Answer: Option D

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48

What are the essential components of a battery ignition system?

A) Battery B) Ignition switch C) Ballast resistor D) All of the mentioned

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Answer & Solution

Answer: Option D

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49

The vacuum advance mechanism functions at

A) Light engine load B) Heavy engine load C) High engine speed D) Any of these conditions

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Answer & Solution

Answer: Option A

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50

The centrifugal governor advance mechanism provides ignition advance in response to

A) Engine load B) Engine speed (or engine rpm) C) Both A and B D) None of these

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Answer & Solution

Answer: Option B

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Ignition System MCQ Questions & Answers | Automobile Engineering