The inner diameter of a small test tube can be
measured accurately using a
A. Micrometer screw gauge
B. Pair of dividers
C. Metre rule
D. Pair of vernier calipers.
D. Pair of vernier calipers.
The correct answer is D. Pair of vernier calipers.
Vernier calipers are used to measure the inner diameter of objects with great accuracy. They consist of a main scale and a sliding vernier scale, which allows for precise readings to be taken. By adjusting the caliper to fit inside the small test tube, you can then read the measurement on the scale to determine the inner diameter accurately.