# 10 - Science - 14. Physics - Measuring Instruments

Approved & Edited by ProProfs Editorial Team
The editorial team at ProProfs Quizzes consists of a select group of subject experts, trivia writers, and quiz masters who have authored over 10,000 quizzes taken by more than 100 million users. This team includes our in-house seasoned quiz moderators and subject matter experts. Our editorial experts, spread across the world, are rigorously trained using our comprehensive guidelines to ensure that you receive the highest quality quizzes.
P
Community Contributor
Quizzes Created: 19 | Total Attempts: 60,684
Questions: 5 | Attempts: 2,097

Settings

Prepared By Mr. S. Ravikumar, B. T. Asst., GHS, Arangaldhurgam, Vellore District.   ; &nbs p; & www. Padasalai. Net

• 1.

### Screw gauge is an instrument to measure the dimensions of very small objects upto _____

• A.

0.1 cm.

• B.

0.01 cm.

• C.

0.1 mm.

• D.

0.01 mm.

D. 0.01 mm.
Explanation
A screw gauge is a highly precise instrument used to measure the dimensions of very small objects. It consists of a screw mechanism that allows for extremely accurate measurements. The answer of 0.01 mm indicates that the screw gauge can measure objects with a precision of one hundredth of a millimeter. This level of accuracy is necessary when dealing with very small objects, such as microchips or microscopic organisms, where even the smallest variations in dimension can have significant effects.

Rate this question:

• 2.

### In a screw gauge zero of the head scale lies below the pitch scale axis, the zero error is ______

• A.

Positive

• B.

Negative

• C.

Nil

A. Positive
Explanation
The given question is asking about the zero error in a screw gauge where the zero of the head scale lies below the pitch scale axis. In this case, the zero error is positive. This means that the actual measurement will be greater than the reading obtained from the instrument.

Rate this question:

• 3.

### Screw gauge is used to measure the diameter of ______

• A.

Crow bar

• B.

Thin wire

• C.

Cricket ball

B. Thin wire
Explanation
A screw gauge is used to measure the diameter of a thin wire because it provides a more precise measurement than other measuring instruments. The screw gauge consists of a screw mechanism that moves a spindle towards or away from an anvil. By rotating the thimble, the spindle moves, allowing for accurate measurements of the wire's diameter. This is particularly useful for measuring thin wires, as their small size requires a high level of precision.

Rate this question:

• 4.

### One light year is equal to _______

• A.

365.25 x 24 x 60 x 60 x 3 x 108 m

• B.

1 x 24 x 60 x 60 x 3 x 108 m

• C.

360 x 24 x 60 x 60 x 3 x 108 m

A. 365.25 x 24 x 60 x 60 x 3 x 108 m
• 5.

### One astronomical unit is the distance between the centre of the earth and _____________

• A.

Centre of the Moon

• B.

Centre of the Sun

• C.

Centre of the Mars

B. Centre of the Sun
Explanation
One astronomical unit is the distance between the center of the earth and the center of the Sun. This unit is used to measure distances within our solar system. The center of the Moon and the center of Mars are not used as reference points for measuring astronomical units.

Rate this question:

Quiz Review Timeline +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

• Current Version
• Mar 19, 2023
Quiz Edited by
ProProfs Editorial Team
• Dec 02, 2013
Quiz Created by