Ignition System — Part 1 MCQs with Explanations

0.45 to 1.00 mm is the correct answer to “Spark plug gaps are required in the range of”. This question is standard in competitive examination syllabi for Ignition System.

It is the time for which the contact breaker points remain closed is the correct answer to “What is the dwell time”. This question is standard in competitive examination syllabi for Ignition System.

Over-heated spark plug is the correct answer to “Preignition can be caused due to presence of . . . . . . . .”. This question is standard in competitive examination syllabi for Ignition System.

A signal rotor, a pick up coil and a permanent magnet is the correct answer to “A signal generator in transistorized ignition system consist of”. This question is standard in competitive examination syllabi for Ignition System.

12 to 15 kV is the correct answer to “The voltage required to produce a spark between the spark points in spark plug is in the range”. This question is standard in competitive examination syllabi for Ignition System.

Tungsten is the correct answer to “The contact breaker points are generally made of”. This question is standard in competitive examination syllabi for Ignition System.

Twice the value of four-stroke is the correct answer to “How is the frequency of firing in a two-stroke concerning the value of four-stroke engines”. This question is standard in competitive examination syllabi for Ignition System.

False is the correct answer to “Part load operation of a spark ignition engine is not affected by throttling the incoming charge.”. This question is standard in competitive examination syllabi for Ignition System.

Stroboscopic light is the correct answer to “Which instrument is used for adjusting the ignition timing”. This question is standard in competitive examination syllabi for Ignition System.

True is the correct answer to “The function of the distributor is to distribute the ignition surges to the individual spark plug in the correct sequence and at the correct instants in time.”. This question is standard in competitive examination syllabi for Ignition System.

Insulator tip is the correct answer to “Which of the following is the hottest part of the spark plug”. This question is standard in competitive examination syllabi for Ignition System.

True is the correct answer to “Due to throttling a smaller amount of charge enters the cylinder and the dilution due to residual gases is also greater.”. This question is standard in competitive examination syllabi for Ignition System.

Speed is the correct answer to “Which of the following condition is taken care of by the centrifugal advance mechanism”. This question is standard in competitive examination syllabi for Ignition System.

Relief valve is the correct answer to “Which device is used to control the quantity of oil circulation and to maintain correct pressure in the lubricating system”. This question is standard in competitive examination syllabi for Ignition System.

True is the correct answer to “An ignition system should be compact and easy to maintain.”. This question is standard in competitive examination syllabi for Ignition System.

All of the above is the correct answer to “The firing order of an I. C. engine depends upon”. This question is standard in competitive examination syllabi for Ignition System.

True is the correct answer to “Battery is connected to the primary winding of the ignition coil through an ignition switch and blast resistor.”. This question is standard in competitive examination syllabi for Ignition System.

The contact breaker, ignition switch and condenser is the correct answer to “The three basic components of primary ignition circuit are”. This question is standard in competitive examination syllabi for Ignition System.

Spark plugs which have high heat dispersion performance are known as cold type spark plugs and those with low performance as hot type spark plugs is the correct answer to “Which of the following statements is correct with regard to the heat range of spark plugs”. This question is standard in competitive examination syllabi for Ignition System.

25,000 volts is the correct answer to “The induction coil steps up low voltage current of 6 or 12 volts to high voltage current upto about”. This question is standard in competitive examination syllabi for Ignition System.

True is the correct answer to “An ignition system should function efficiently over the entire range of engine speed.”. This question is standard in competitive examination syllabi for Ignition System.

Both A and B is the correct answer to “The distributor serves the following purposes in the ignition system”. This question is standard in competitive examination syllabi for Ignition System.

All of the above is the correct answer to “The following affect the voltage required to jump over the gap of spark plug”. This question is standard in competitive examination syllabi for Ignition System.

Heavy is the correct answer to “The alkaline battery is used in . . . . . . . . duty commercial vehicles.”. This question is standard in competitive examination syllabi for Ignition System.

One-half is the correct answer to “The ratio of the distributor shaft and the crankshaft speed is”. This question is standard in competitive examination syllabi for Ignition System.

Feeler gauge is the correct answer to “The contact breaker points gap can be adjusted by”. This question is standard in competitive examination syllabi for Ignition System.

6 V to 12 V is the correct answer to “In battery ignition system, the energy required for producing spark is obtained from a . . . . . . . . battery.”. This question is standard in competitive examination syllabi for Ignition System.

Minimizing pitting of the contact breaker points is the correct answer to “The main function of the condenser in an ignition system is”. This question is standard in competitive examination syllabi for Ignition System.

Computerized advance control is the correct answer to “Which of the following type of advancement uses the ECU”. This question is standard in competitive examination syllabi for Ignition System.

Ignition failure at high speeds is the correct answer to “The excessive contact breaker point gap causes”. This question is standard in competitive examination syllabi for Ignition System.

Capacitive discharge Ignition system is the correct answer to “A solid state switch, known as Thyristor is employed in”. This question is standard in competitive examination syllabi for Ignition System.

False is the correct answer to “The ignition timing is fixed to obtain minimum power from the engine.”. This question is standard in competitive examination syllabi for Ignition System.

1. 3. 4. 2 is the correct answer to “In four cylinder in. line engine, the probable firing order is”. This question is standard in competitive examination syllabi for Ignition System.

High voltage is the correct answer to “How is the voltage of the used spark plug to fire when compared to a new spark plug”. This question is standard in competitive examination syllabi for Ignition System.

False is the correct answer to “A spark can be caused by applying a sufficiently low voltage between two electrodes separated by a gap.”. This question is standard in competitive examination syllabi for Ignition System.

Resistor spark plug is the correct answer to “Which of the following spark plug increases the resistance to increase the voltage required to jump across the spark plug gap”. This question is standard in competitive examination syllabi for Ignition System.

Condenser is the correct answer to “Which of the following is used to store the inertia of the current flowing during the contact period”. This question is standard in competitive examination syllabi for Ignition System.

Short reach spark plug is the correct answer to “If the length of the spark plug threaded section is less, then it is called as”. This question is standard in competitive examination syllabi for Ignition System.

Low carbon steel is the correct answer to “Which of the following is used as a material for the body shell of the spark plug”. This question is standard in competitive examination syllabi for Ignition System.

True is the correct answer to “If the resistance of the deposits on the spark plug electrodes is sufficiently high, the loss of electrical energy through these deposits may prevent the spark discharge.”. This question is standard in competitive examination syllabi for Ignition System.