155. Which of the following methods is not concerned with surface finish measurement
A.Spectrophotometry method
B.Ultrasonic method
C.Field emission method
D.Critical angle of attack method
156. A spirit level is required to have 2 mm of bubble movement of 2" inclination. The
A.Radius of tube should be around
B.(d) 120 m
C.(b) 20 mm
D.(c) 80m
157. The only natural material producing a spectral line (6440? A red) almost completely symmetrical is
A.Cadmium
B.Mercury
C.Krypton
D.Helium
158. A photo-electric device in which the resistance of the metal changes directly, proportional to the light striking on it, is known as
A.Photo-cell
B.Photo-emission cell
C.Photo-voltaic cell
D.Photo conductive cell
159. Universal surface gauge is used for
A.Checking straightness
B.Checking flatness
C.Checking parallelism
D.Layout work and inspection
160. Which of the following is not the correct method of specifying numerical value of surface roughness mean line
A.Centre-line average (CLA) value
B.Mean-line and envelop line systems
C.R.m.s value
D.Peak-to-valley height
161. According to Taylor's Principle, No Go gauge checks
A.Only one feature at a time
B.Only important dimensions at a time
C.All the dimensions at a time
D.Only the related 'dimensions at a time
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