Caliper Assessment Vernier Measurement 5

Question 1

A vernier caliper is used to measure a gauge block known to be exactly 50.000 mm. The caliper reads 50.04 mm. This instrument has a systematic error of:

Accepted Answer

+0.04 mm

Answer

The caliper over-reads by 50.04 − 50.00 = +0.04 mm, indicating a positive systematic error.

Question 2

When using a vernier caliper to measure the groove width on a shaft, which jaw orientation is correct?

Accepted Answer

Upper jaws inserted into the groove to measure as an internal dimension

Answer

A groove's width is an internal (inside) dimension measured by inserting the upper (inside) jaws into the groove.

Question 3

The abbreviation 'MSD' in vernier caliper theory stands for:

Accepted Answer

Main Scale Division

Answer

MSD stands for Main Scale Division, the spacing between consecutive graduations on the fixed main scale.

Question 4

If a 25-division vernier caliper has a positive zero error where the 5th vernier line coincides, and a raw reading shows the 12th vernier line coinciding with a main scale of 18 mm, what is the corrected reading?

Accepted Answer

18.28 mm

Answer

LC = 0.04 mm; raw reading = 18 + (12×0.04) = 18.48 mm; zero error = 5×0.04 = 0.20 mm; corrected = 18.48 − 0.20 = 18.28 mm.

Question 5

In a Caliper Assessment cognitive test, 'vernier measurement' questions most often test:

Accepted Answer

The ability to accurately read and interpret a scaled diagram under time pressure

Answer

Caliper Assessment aptitude tests evaluate numerical reasoning and the ability to extract precise values from scale diagrams quickly.

Caliper Assessment Practice Test

Caliper Assessment Practice Test

Caliper Assessment Vernier Measurement 5