ZIMSEC O Level Physics Measurement and Units questions

Question 1

Which row correctly gives the measuring instruments to measure the length of a wire of about 80 cm and diameter 0.20 cm? (length / diameter)

Accepted Answer

metre rule / micrometer screw gauge

Question 2

What instrument is used to measure velocity at an instant?

Accepted Answer

speedometer

Question 3

The diagram shows a measurement on a vernier callipers. The reading shown is

Accepted Answer

5.56 cm.

Question 4

Which instrument is most suitable for measuring a length of 2.100 cm?

Accepted Answer

micrometer screw gauge

Question 5

What is the reading shown on the vernier callipers?

Accepted Answer

8.6 mm

Question 6

Which of the quantities is a base quantity?

Accepted Answer

time

Question 7

What is the reading shown on the vernier scale?

Accepted Answer

3.34 cm

Question 8

State the SI base unit of mass, including its symbol.

Accepted Answer

kilogram

Question 9

Name the laboratory instrument commonly used to measure the mass of an object.

Accepted Answer

triple beam balance

Question 10

Fig. 1.1 shows one of the basic laboratory instruments, used to measure small lengths such as wire diameter or sheet thickness. What is the name of this instrument?

Accepted Answer

micrometer screw gauge

Question 11

On a micrometer screw gauge, the sleeve (barrel) scale reads 8.5 mm and the thimble scale adds a further 0.35 mm. What is the total reading shown?

Accepted Answer

8.85 mm

Question 12

A micrometer screw gauge is used to measure the diameter of a small workpiece. Which of the following is a correct precaution to take when using this instrument?

Accepted Answer

Use the ratchet to avoid over-tightening on the workpiece.

Question 13

Twenty turns of wire are wound closely together around a pencil so that the length spanning the turns is 25 mm. Calculate the thickness of the wire.

Accepted Answer

1,25 mm

Question 14

Fig. 1.1 shows 20 turns of wire wound closely around a pencil, with the length spanning the turns labelled AB. Name the instrument used to measure the length AB.

Accepted Answer

metre rule

Question 15

An instrument has a spindle, an anvil, a sleeve scale marked in millimetres, and a thimble scale, and includes a ratchet to avoid over-tightening on the object being measured. What is this instrument called?

Accepted Answer

micrometer screw gauge

Question 16

A micrometer screw gauge used to measure the diameter of a wire has a sleeve (main) scale reading of 5.5 mm, and its thimble scale reads 0.12 mm at the datum line. What is the total diameter reading?

Accepted Answer

5.62 mm

Measurement and Units Questions and Answers

Test yourself on this topic

Which row correctly gives the measuring instruments to measure the length of a wire of about 80 cm and diameter 0.20 cm? (length / diameter)

State the SI base unit of mass, including its symbol.

What instrument is used to measure velocity at an instant?

Name the laboratory instrument commonly used to measure the mass of an object.

The diagram shows a measurement on a vernier callipers. The reading shown is

Fig. 1.1 shows one of the basic laboratory instruments, used to measure small lengths such as wire diameter or sheet thickness. What is the name of this instrument?

Which instrument is most suitable for measuring a length of 2.100 cm?

On a micrometer screw gauge, the sleeve (barrel) scale reads 8.5 mm and the thimble scale adds a further 0.35 mm. What is the total reading shown?

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