An ignition system should function efficiently over the entire range of engine speed.
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The distributor serves the following purposes in the ignition system
A. It operates break and make mechanism
B. It distributes high tension current to spark plug at correct time
C. Both A and B
D. None of the above
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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
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The alkaline battery is used in . . . . . . . . duty commercial vehicles.
A. Heavy
B. Light
C. Large
D. None of the mentioned
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The ratio of the distributor shaft and the crankshaft speed is
A. One
B. One-half
C. One-fourth
D. Two
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The contact breaker points gap can be adjusted by
A. Stroboscope
B. Tachometer
C. Ignition tester
D. Feeler gauge
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In battery ignition system, the energy required for producing spark is obtained from a . . . . . . . . battery.
A. 6 V to 12 V
B. 12 V to 24 V
C. 24 V to 30 V
D. None of the mentioned
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The main function of the condenser in an ignition system is
A. Minimizing pitting of the contact breaker points
B. To intensify the spark
C. To absorb the energy stored in the primary winding
D. All of the above
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Which of the following type of advancement uses the ECU?
A. Vacuum advance
B. Centrifugal advance
C. Complete vacuum control
D. Computerized advance control
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The excessive contact breaker point gap causes
A. Ignition failure at high speeds
B. Increased dwell
C. Rapid burning of points
D. All of these
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A solid state switch, known as Thyristor is employed in
A. Battery coil ignition system
B. Magneto Ignition system
C. Electronic Ignition system
D. Capacitive discharge Ignition system
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The ignition timing is fixed to obtain minimum power from the engine.
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In four cylinder in. line engine, the probable firing order is
A. 1. 3. 4. 2
B. 1. 2. 3. 4
C. 2. 4. 1. 3
D. 2. 1. 3. 4
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How is the voltage of the used spark plug to fire when compared to a new spark plug?
A. High voltage
B. Less voltage
C. Has no effect
D. Depends on the current value
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A spark can be caused by applying a sufficiently low voltage between two electrodes separated by a gap.
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Which of the following spark plug increases the resistance to increase the voltage required to jump across the spark plug gap?
A. Rheostat spark plug
B. Wire wound spark plug
C. MOSFET spark plug
D. Resistor spark plug
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Which of the following is used to store the inertia of the current flowing during the contact period?
A. Contact breaker
B. Condenser
C. Distributor
D. Ballast resistor
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If the length of the spark plug threaded section is less, then it is called as
A. Short reach spark plug
B. Long reach spark plug
C. Slow reach spark plug
D. Quick reach spark plug
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Which of the following is used as a material for the body shell of the spark plug?
A. Low carbon steel
B. Ceramic
C. Paper
D. Wood
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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.
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