Top Mechanical Measurement & Metrology Objective Questions
1-The degree of closeness of the measured value of a certain quantity with its true value is known as
Accuracy
Precision
Standard
Sensitivity
(Ans: a)
2-Error of measurement =
True value – Measured value
Precision – True value
Measured value – Precision
None of the above
(Ans: a)
3-The ability by which a measuring device can detect small differences in the quantity being measured by it, is called its
Damping
Sensitivity
Accuracy
None of the above
(Ans: b)
4-The following term(s) is (are) associated with measuring devices
Sensitivity
Damping
Both ‘a’ and ‘b’
None of the above
(Ans: c)
5-To compare an unknown with a standard through a calibrated system is called
Direct comparison
Indirect comparison
both ‘a’ and ‘b’
None of the above
(Ans: b)
6-The following is an internationally recognized and accepted unit system
MKS
FPS
SI
All of the above
(Ans: c)
7-One yard = _____ inch
36
38
40
42
(Ans: a)
8-The following is a line standard of measurement
Measuring tape
Slip gauge
Micrometer
End bars
(Ans: a)
9-The ‘Wringing’ is due to
Atmospheric pressure
Molecular attraction
both ‘a’ and ‘b’
None of the above
(Ans: c)
10-The angle gauge by Dr. Tamlison consists of a set of
10 gauges
12 gauges
14 gauges
16 gauges
(Ans: a)
11-1 Angstrom (Å) = _____
10^-6m
10^-8m
10^-10m
10^-12m
(Ans: c)
12-The principle of ‘Interchangeability’ is normally employed for
Mass production
Production of identical parts
Parts within the prescribed limits of sizes
All of the above
(Ans: d)
13-Following is the theoretical size which is common to both the parts of a mating pair
Normal size
Actual size
Base size
All of the above
(Ans: c)
14-_____ is equal to the differences of the two limits of size of the part
Tolerance
Low limit
High limit
Design size
(Ans: a)
15-The amount by which the actual size of a shaft is less than the actual size of mating hole in an assembly
Clearance
Interference
Allowance
None of the above
(Ans: a)
16-The amount by which the actual size of a shaft is less than the actual size of mating hole in an assembly
Clearance
Interference
Allowance
None of the above
(Ans: b)
17-A positive allowance will always result in a _____ fit.
Clearance
Interference
both ‘a’ and ‘b’
Any of the above
(Ans: a)
18-A negative allowance will always result in a _____ fit.
Clearance
Interference
Transition
Any of the above
(Ans: b)
19-A shaft rotating in a bushed bearing is good example of
Sliding fit
Running fit
Push fit
Driving fit
(Ans: b)
20-Fitting of rim on a locomotive wheel is done by
Keying fit
Driving fit
Force fir
Any of the above
(Ans: c)
21-The following is used to check the diameters of holes
Plug gauge
Ring gauge
Slip gauge
Standard screw pitch gauge
(Ans: a)
22-To check external diameter of hole, we use
Plug gauge
Ring gauge
Slip gauge
Standard screw pitch gauge
(Ans: b)
23-‘GO’ and ‘NO GO’ gauge is a type of
plug gauge
slip gauge
ring gauge
limit gauge
(Ans: d)
24-The following is not a type of comparator
Electrical
Pneumatic
Optical
Hydraulic
(Ans: d)
25-‘Electrolimit’ gauge block comparator and ‘Talyman’ Electrical comparator work on the principle of
Kirchoff’s law
Wheatstone bridge
Faraday,s law
Lenz,s law
(Ans: b)
26-The following is not used to measure angles
Bevel protectors
Calibrated levels
Clinometers
Optical flats
(Ans: d)
27-In v-shape method, the minor diameter of thread is given by
D ± (d2 – d1)
D ± (d1 – d2)
D ± (d2 + d1)
None of the above
Where, D = Diameter of cylindrical gauge, d1 = micrometer reading of cylindrical gauge, d2 = micrometer reading of threads, d = minor diameter
(Ans: a)
28-The following is not a method to find effective thread diameter
Thread micrometer
Two wire method
Three wire method
The v-piece method
(Ans: d)
29-The effective diameter (E) in three wire method is given by
E = M – C
E = M + C
E = M / C
E = M x C
(Ans: a)
30-The following method(s) is (are) used to measure the minor diameter of internal threads
Taper parallels methods
Calibrated rollers methods
both ‘a’ and ‘b’
None of the above
(Ans: c)