Which of the following is defined as the actual high voltage at which the spark occurs?
A. Cut-in voltage
B. Saturated voltage
C. Breakdown voltage
D. Cut-off voltage
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In Magneto Ignition system
A. No battery is required
B. Engine starting is rather difficult
C. Used in high speed engines
D. All of the above
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What is the gap in millimeters in the contact breaker?
A. 0.35 - 0.45
B. 0.5 - 0.7
C. 0.7 - 0.9
D. 1 - 1.5
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How many numbers of vacuum openings are provided in the carburetor in a complete vacuum control type?
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Which among the following increases with speed which in turn improves the rate of combustion?
A. Enthalpy
B. Turbulence
C. Vaccum
D. Entropy
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The lead acid battery is used in . . . . . . . . duty commercial vehicles.
A. Heavy
B. Light
C. Large
D. None of the mentioned
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Which of the following part vacuum is referred to as a ported vacuum in a vacuum advance type?
A. Crankcase
B. Engine deck
C. Radiator
D. Carburetor
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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
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A spark is produced to ignite a homogeneous air fuel mixture in the combustion chamber of an engine, it is called spark ignition system.
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What is the general crankshaft degree range of advancement in a centrifugal advance system?
A. 10 - 15
B. 20 - 25
C. 26 - 32
D. 34 - 38
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In compression ignition four stroke cycle engine, cam shaft runs at
A. Half the speed of crankshaft
B. Same the speed of crankshaft
C. Twice the speed of crankshaft
D. Any speed irrespective of crankshaft speed
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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
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The total enthalpy required to cause the flame to be self sustaining and promote ignition, is given by the product of the surface area of the spherical flame and the enthalpy per unit area.
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The components of secondary ignition circuit include the secondary winding of ignition coil, distributor rotor, distributor cap and
A. Condenser
B. Spark plugs
C. Ignition switch
D. Distributor drive gear
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An ignition process obeys the law of . . . . . . . .
A. Conservation of mass
B. Conservation of energy
C. Conservation of momentum
D. None of the mentioned
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What is the name of the chemical solution used in a battery for chemical reactions?
A. Container
B. Terminal wires
C. Electrolyte
D. Separators
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When the temperature of the center electrode exceeds a certain temperature, any carbon that has adhered will be burnt off, and the temperature at which this burning off of carbon commences is referred to as self cleaning temperature.
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The primary winding of ignition coil is made of . . . . . . . .
A. 1 mm diameter copper wire
B. 0.8 mm diameter copper wire
C. 0.6 mm diameter copper wire
D. 1.2 mm diameter copper wire
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How much spark per minute is required by an eight-cylinder engine running at 4000 rpm?
A. 10000
B. 12000
C. 16000
D. 20000
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Which of the following is.used as a material for the ground electrode of the spark plug?
A. Nickel
B. Cast iron
C. Brass
D. Bronze
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