This set of Engineering Metrology Multiple Choice Questions & Answers (MCQs) focuses on “Test Indicators”.
1. Which of the following has a maximum sensitivity?
a) Vernier caliper
b) Test indicator
c) Dial indicator
d) Passmeter
View Answer
Explanation: Accuracy, dependability, performance of test Indicators are outstanding and also long life. Maximum sensitivity and accuracy ensured by jewel mounting of the movement in conjunction with gears and pinions which are precision ground.
2. Which type of housing is used in the test indicator?
a) Box type
b) Spherical
c) Split type
d) Detachable
View Answer
Explanation: Test indicator is a self-contained instrument, a separate unit which can be easily replaced and removed when in a case or need of repair or for maintenance. The housing of test indicator is of box type.
3. Which of the following is the difference between test indicator and dial indicator?
a) Test indicator has lever type contacts
b) Dial indicator is lighter than test indicator
c) Dial indicator is smaller than test indicator
d) Stylus is present in dial indicator but not in test indicator
View Answer
Explanation: Test indicators are different from the dial indicators. The obvious difference between these two is that dial indicators have plunger-type contacts and test indicators have lever-type contacts. Test indicators are also lighter and smaller than dial indicators.
4. Which of the following is true about housing of test indicator?
a) Opens at the bottom only
b) Opens at the top only
c) Opens at bottom and top both
d) Opens at front only
View Answer
Explanation: The housing of test indicator opens at the front only. Single piece construction of side panels and also of bottom surface. The housing encloses totally the movement. It provides maximum protection against shock and damages.
5. Which of the following option is true for the given statement about test indicators?
Statement 1: It can’t measure depth of holes.
Statement 2: Spring force is low.
a) T, F
b) F, F
c) T, T
d) F, T
View Answer
Explanation: The test indicators cannot measure the depth of the holes as dial indicators can. On the test indicator the spring force is very lower, which is desirable while measuring deformable materials.
6. Which of the following is true about the material used for making parts in test indicators?
a) No part is made of plastic
b) All parts are made of hardened steel
c) Cover over the dial face is made of hardened metal
d) Cover over the dial face is made of plastic
View Answer
Explanation: Plastic parts are not used on this instrument but there is an exception of the cover over the dial face which is made up of plastic. Easy to read by sharply defined dial face is present with contrasting numerals.
7. What is the shape of the front end of the housing of a test indicator?
a) Rectangle
b) Shape of a fork
c) Square
d) Shape of a round ball
View Answer
Explanation: The design of front end of the housing is of the shape of a fork and between this fork the axis of the stylus is mounted, thus providing added shock resistance and stability. The precision alignment of the 2 mounts also insures maximum accuracy.
8. Which of the following option is true about the guideways present is test indicator?
a) Dovetail guideways are present only at the top of the housing
b) Dovetail guideways are present only at the bottom of the housing
c) Dovetail guideways are present at the top and bottom of the housing
d) Square guideways are present only at the top of the housing
View Answer
Explanation: Dovetail guideways are present at top and bottom of the housing which permits easy movement of the mounting shanks. By simply tightening a clamp nut which is knurled they can be clamped at any desired point. No need of separate tool.
9. Which of the following is not an advantage of automatic reversing in test indicators?
a) Error free reading
b) Less effort
c) Eliminate reversing lever
d) Indicator hand always move anti-clockwise
View Answer
Explanation: Automatic reversing is present in test indicator which eliminates the need of reversing lever. The indicator hand present in it always moves in clockwise direction which ensures error-free readings.
10. Which of the following option is true for the given statements about test indicators?
Statement 1: Housing has a satin chrome finish.
Statement 2: Stylus is made of stainless hardened steel.
a) T, F
b) F, F
c) T, T
d) F, T
View Answer
Explanation: It has a Corrosion-proof housing with satin chrome finish and stainless hardened steel for the stylus. Test indicators are of unique quality and durability. Even after millions of measurement test indicators are still accurate and meet specifications.
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