Practice MCQs For Measurement of Physical Quantities

This quiz contains practice questions for Measurement Of Physical Quantities (O Level). There are explanations for some of the questions after you submit the quiz. If you could not figure out why a particular option is the answer, feel free to drop a comment below or ask a question in ‘O’ & ‘A’ Level Discussion section of the forum. If you wish to contribute questions to this quiz, please contact us.

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1. The diagram shows part of a vernier scale.

What is the correct reading?

42.5 mm

30.5 mm

38.0 mm

33.5 mm

2. Which of the following is precise, but not accurate?

D

B

A

C

3. In an experiment, it is required to measure the distance between two points which are between 0.7 m to 0.8 m apart. Which of the following instruments should be used so that the distance can be measured to within an accuracy of 0.001 m?

A ten-metre measuring tape

A metre rule

A half-metre rule

A metre rule and a pair of vernier calipers

4. Which of the following is equivalent to the units of force?

$\text{kg m s}^{2}$

$\text{kg m s}^{-1}$

$\text{kg m s}$

$\text{kg m s}^{-2}$

5. Which instrument is used to measure the internal diameter of a pipe with a single measurement?

Manometer

Measuring Cylinder

Micrometer

Vernier Calipers

6. A vernier caliper is precise to __________ ?

1 mm

0.1 mm

0.001 mm

0.01 mm

7. Which of the following is a scalar quantity?

the braking force needed to stop a car

the heat needed to boil some water

the thrust needed to lift a rocket off the ground

the effort needed to hammer a nail into wood

8. A micrometer screw gauge is precise to ________ ?

0.01 mm

0.1 mm

0.05 mm

0.005 mm

9. In a micrometer screw gauge, the ratchet is used to

correct the zero error

turn the circular scale

apply the correct pressure

lock the spindle

10. When using a measuring cylinder, one precaution to take is to __________.

look at the meniscus from below the level of the water surface

check for the zero error

position the eye in line with the base of the meniscus

obtain more readings by looking from more than one direction

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