This set of Engineering Metrology Multiple Choice Questions & Answers (MCQs) focuses on “Multicheck Comparators”.
1. Which of the following option is incorrect for multicheck comparators?
a) Economical procedure
b) Inspection of all dimensions at the same time
c) Used where all dimensions are independent with each other
d) These are used to save time of inspection
Explanation: Multicheck comparators are desired in those places where various dimensions have some relationship with each other for example concentricity and diameter measurement. It is an economical procedure.
2. How many electrical check heads are incorporated in electric multicheck?
Explanation: Electrical multi check comparator is a combination gauge. 20 or more electrical-check heads are incorporated in electrical multi check comparator to measure a number of dimensions simultaneously.
3. Which of the following is not a requirement for automatic gauging?
a) High speed interface
b) High power and low heat
c) Compact size
d) Validate with safety requirements
Explanation: Automatic gauging machines are very accurate machines. They eliminate manual inspection of parts. All dimensions of part are inspected simultaneously and segregated and classified automatically.
4. Which of the following is incorrect for electric multicheck?
a) High production rate
b) Less chances of error
c) Eliminate manual inspection
d) Increase accuracy
Explanation: The instrument is used in high production checking. To check a dimension a master signal light is used to integrate all individual lights. Inspector has to watch only one light. Instrument is used for all sizes of works.
5. How many measuring heads are present in electric check for each dimension?
Explanation: For each dimension, signal lights and one measuring head are used for each dimension which indicates whether It is with in the tolerance limit, oversized or undersized.
6. Which of the following statement is true for multi check gauging?
Statement 1: In air multichecks, it is difficult to set air comparators.
Statement 2: Mass inspection is possible in air multichecks.
a) T, F
b) F, T
c) F, F
d) T, T
Explanation: In air multicheck comparators, group of air comparators are used. It is difficult to set these comparators initially to check various dimensions and to arrange them in compact form. But once this set up is done, other things become very easy.
7. Which of the following comparator is most accurate for mass inspection?
a) Electric multicheck comparator
b) Air multicheck comparator
c) Air electric multicheck comparator
d) Automatic gauging machines
Explanation: Automatic gauging machines are most accurate among them. These are similar to multicheck devices and incorporate comparator amplifying methods. Less skilled operator is required as all the inspection is done automatically.
8. If an air electric multicheck comparator is used to check dimensions of shafts then which of the following option is correct?
a) Air comparators are used for checking concentricity only
b) Air comparators are used for checking concentricity and diameter
c) Electric multicheck is used to check diameter only
d) Electric multicheck is more convenient to check concentricity and diameter
Explanation: Both the air multicheck comparator and electric multicheck comparator are used in this type of comparator. It is convenient and easy to use air comparator to check diameter and concentricity and for other measurements, electric-checks are used.
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