The distance traveled by the circular scale on the vernier scale in one rotation is called……of the screw gauge.
a) least count
b) pitch
c) scale
d) one division
The least count of screw gauge is…………..
a) 0.1 mm
b) 0.01mm
c) 0.001cm
d) both b & c
On closing jaws, when zero of the vernier scale does not coincide with zero of the main scale, it is said to have…………..error.
a) personal
b) systematic
c) zero
d) random
When the thimble and anvil of a screw gauge meet and the zero of the circular scale does not coincide with zero of the main scale, it is said to have…………..error.
a) personal
b) systematic
c) zero
d) random
There are…………..types of zero error.
a) 3
b) 5
c) 5
d) 2
Explanation: i) Positive zero error ii) Negative zero error
Which instrument is more accurate?
a) vernier caliper
b) screw gauge
c) measuring tape
d) both a & b
Explanation: Those instruments which have smallest least counts are more accurate. (Vernier caliper= 0.1mm and Screw gauge = 0.01)
