Questions and Answers Section 8

Questions and Answers

Question :

71.The negative terminal post on the top of a battery is

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smaller than the positive terminal post 

Question :

72.How many cells are used in a 12 volt car battery ?

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6

Question :

73.In an engine, the temperature of the piston will be more at the

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crown of the piston




Question :

74.An over-inflated tyre will wear the tread most near the

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centre

Question :

75.Cushioning springs in clutch plate reduces

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jerky starts

Question :

76.In a four stroke engine for each crankshaft revolution, the camshaft revolves 

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one-half turn

Question :

77.If a tyre is designated as 175/65 R14 82 S, then the aspect ratio for the tyre is

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65




Note:-165/65 R14 82S

here


165 denotes the width of the tyre in mm.

65 is the tyre profile. It is the height of the tyre sidewall as a percentage of the width. Here it is 65% of 165=107.25mm

R denotes that it is a radial construction
An optional letter indicating construction of the fabric carcass of the tire
B: bias belt 
D: diagonal
R: Radial
if omitted, then it is a cross-ply tire

Question :

78.The valve tappet clearance is measured by

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feeler gauge

Note:-a gauge consisting of a number of thin blades for measuring narrow gaps or clearances.

Question :

79.The specific gravity of petrol is about 

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0.739

Note:-

For petrol, Specific gravity at 60°F (140°C) is 0.739. The specific gravityis the ratio between the density of an object, and a reference substance. Usually reference substance is water which has a density of 1 gram per milliliter or 1 gram per cubic centimeter. Being a ratio it does not have any units.

Question :

80.The clutch is located between the transmission and the 

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engine