Q2 of 10 Page 231

In a Screw Gauge, if the zero of the head scale lies below the pitch scale axis, the zero error is_________ .(positive, negative, nil)

The zero error in this case is positive.

Explanation: In a Screw Gauge, if the zero of the head scale lies below the pitch scale axis, the zero error is positive by convention and it’s then subtracted from the final measured value. If the zero of the head scale lies below the pitch scale axis, the zero error is considered negative and it’s then added to the final measured value.


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1

Screw Gauge is an instrument used to measure the dimensions of very small objects upto _________ (0.1 cm, 0.01 cm, 0.1 mm, 0.01 mm)

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The Screw Gauge is used to measure the diameter of a _________ (crowbar, thin wire, cricket ball )

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One light year is equal to _________.

i) 365.25 x 24 x 60 x 60 x 3 x 108 m


ii) 1x 24 x 60 x 60 x 3 x 108 m


iii) 360 x 24 x 60 x 60 x 3 x 108 m


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