MULTIPLE CHOICE QUESTIONS ON MECHANICAL MEASUREMENTS

MULTIPLE CHOICE QUESTIONS ON MECHANICAL MEASUREMENTS

1-The amount by which the actual size of a shaft is less than the actual size of mating hole in an assembly

1. Clearance
2. Interference
3. Allowance
4. None of the above

(Ans: b)

2-A positive allowance will always result in a _____ fit.

1. Clearance
2. Interference
3. both ‘a’ and ‘b’
4. Any of the above

(Ans: a)

3-A negative allowance will always result in a _____ fit.

1. Clearance
2. Interference
3. Transition
4. Any of the above

(Ans: b)

4-A shaft rotating in a bushed bearing is good example of

1. Sliding fit
2. Running fit
3. Push fit
4. Driving fit

(Ans: b)

5-Fitting of rim on a locomotive wheel is done by

1. Keying fit
2. Driving fit
3. Force fit
4. Any of the above

(Ans: c)

6-The following is used to check the diameters of holes

1. Plug gauge
2. Ring gauge
3. Slip gauge
4. Standard screw pitch gauge

(Ans: a)

7-To check external diameter of hole, we use

1. Plug gauge
2. Ring gauge
3. Slip gauge
4. Standard screw pitch gauge

(Ans: b)

8-‘GO’ and ‘NO GO’ gauge is a type of

1. plug gauge
2. slip gauge
3. ring gauge
4. limit gauge

(Ans: d)

9-The following is not a type of comparator

1. Electrical
2. Pneumatic
3. Optical
4. Hydraulic

(Ans: d)

10-‘Electrolimit’ gauge block comparator and ‘Talyman’ Electrical comparator work on the principle of

1. Kirchoff’s law
2. Wheatstone bridge
3. Faraday,s law
4. Lenz,s law

(Ans: b)

11-The following is not used to measure angles

1. Bevel protectors
2. Calibrated levels
3. Clinometers
4. Optical flats

(Ans: d)

12-In v-shape method, the minor diameter of thread is given by

1. D ± (d2 – d1)
2. D ± (d1 – d2)
3. D ± (d2 + d1)
4. 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)

13-The following is not a method to find effective thread diameter

1. Thread micrometer
2. Two wire method
3. Three wire method
4. The v-piece method

(Ans: d)

14-The effective diameter (E) in three wire method is given by

1. E = M – C
2. E = M + C
3. E = M / C
4. E = M x C

(Ans: a)

15-The following method(s) is (are) used to measure the minor diameter of internal threads

1. Taper parallels methods
2. Calibrated rollers methods
3. both ‘a’ and ‘b’
4. None of the above

(Ans: c)