218. All the working surfaces and the cylindrical surfaces of the rollers of sine bar have a surface finish of the order of

A.0.2. micron

B.0.5 micron

C.1 micron

D.5 micron

219. The effect of errors in spacing of the rollers, or height of slip gauge combination is a function of the

A.Sin 0

B.Cos 0

C.Tan 0

D.Cosec 0

220. Sine centre is used for measurement of

A.Included internal angle between two faces

B.Height of projected parts

C.Semi-angle of taper of a job

D.Flatness

221. Clinometer is used for

A.Angular measurement

B.Linear measurement

C.Bore measurement

D.Measurements of environmental conditions

222. Pick up the correct statement. The effect of pitch error and angle error is to

A.Increase the simple effective diameters of a bolt and decrease that of a nut

B.Decrease the simple effective diameter of a bolt and increase that of a nut

C.Increase the simple effective diameter of both bolt and nut

D.Decrease the simple effective diameters of both bolt and nut

223. If 0 is the included angle of a screw thread then change in simple effective diameter due to change in angle error is proportional to

A.Tan

B.Cosec 0.

C.Cos 0

D.Sec 0

224. The best size wire for ISO metric thread for measuring pitch diameters of screw

A.Thread in terms of its pitch p is

B.(a) 0.5 p

C.(b) 0.6 p

D.(c) 0.75 p

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