| 1. | If the air-fuel mixture ignites before the spark takes place at spark plug, the condition is called ? | |
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detonation
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ignition
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pre-ignition
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rumble
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Report Question| 2. | Two advantages of using helical gears rather than spur gears in a transmission system are ? | |
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strength and cost
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strength and less end thrust
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noise level and strength
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noise level and economy
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| 3. | The fuel that detonates easily, is ? | |
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n-heptane
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iso-octane
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benzene
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alcohol
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| 4. | The negative terminal post on the top of a battery ? | |
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smaller than the positive terminal post
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larger than the positive terminal post
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of the same size as the positive terminal post
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none of these
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| 5. | The temperature indicating instrument in vehicles indicates the temperature of ? | |
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engine piston
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engine cylinder
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lubricating oil
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jacket cooling water
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| 6. | The anti-knock property of compression ignition engine fuel can be improved by adding ? | |
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tetraethyl lead
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trimethyl pentane
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amyl nitrate
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hexadecane
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| 7. | One effect of detonation is ? | |
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delay in ignition
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loss of power
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overheating of engine
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overcooling of engine
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| 8. | The gear shift lever requires two separate motions to shift gears, and the first movement ? | |
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moves the synchronizer
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selects the synchronizer
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meshes the gears
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operates the clutch
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| 9. | The rating of C.I. engine fuel (Diesel) is given by ? | |
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octane number
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performance number
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cetane number
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none of these
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| 10. | The auto ignition in a spark ignition engine means ? | |
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automatic ignition of the charge at the end of compression
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ignition induced by the passage of a spark
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ignition of the charge before the passage of flame front
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ignition induced to supplement the process of normal combustion
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