#### Measurement and Measuring Instruments Important Questions

9th Standard

Reg.No. :
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Science

Time : 02:00:00 Hrs
Total Marks : 50
10 x 1 = 10
1. Rulers, measuring tapes and metre scales are used to measure

(a)

Mass

(b)

Weight

(c)

Time

(d)

Length

2. Which among the following is not a device to measure mass

(a)

Spring balance

(b)

Beam balance

(c)

Physical balance

(d)

Digital balance

3. ___________is the derived quantity.

(a)

Length

(b)

Volume

(c)

Mass

(d)

Time

4. Unit of time is_________.

(a)

km

(b)

mm

(c)

second

(d)

cm

5. There are___________fundamental units in SI system of units.

(a)

7

(b)

4

(c)

6

(d)

5

6. The unit of area is_________

(a)

m3

(b)

m

(c)

m2

(d)

$\frac{m}{s}$

7. Light travels________m in one second.

(a)

5 x 103

(b)

5 x 108

(c)

3 x 108

(d)

8 x 103

8. 1 quintal is equal to_______kg.

(a)

100

(b)

200

(c)

1000

(d)

10

9. With the help of common beam balance we can measure mass accurately up to_________gm.

(a)

2 gms

(b)

5 gms

(c)

100 gms

(d)

20 gms

10. _________is the unit distance used to measure astronomical objects outside the solar system.

(a)

Parsec

(b)

km

(c)

cm

(d)

litre

11. 5 x 1 = 5
12. Length, mass and time are called__________.

()

Fundamental unit

13. The smallest amount of time imaginable to us is a twinkling of eye is called_________.

()

atomus

14. JS-1 is the unit of__________.

()

Power

15. 1 metric tonne is equal to________kg.

()

1000

16. The diameter of spherical objects can be measured with___________.

()

Vernier Caliper

17. 5 x 2 = 10
18. What is the full form of SI system?

19. Convert : 104°F in to Celsius scale.

20. Calculate the correct readings of the Vernier caliper L.C. 0.01 em Zero correction - Nil.

 S.No. M.S.R V.C Observed Reading = M.S.R + (V.C x L.C) Correct Reading 1 3 4 2 3 7
21. In which part of the Vernier caliper is used to measure the internal diameter of a cylindrical pipe?

22. Define length.

23. 5 x 3 = 15
24. Write the need of a standard unit

25. How will you measure the least count of vernier caliper ?

26. Copy and complete the table.

 Measurement Unit Symbol Length ---- --- -- Kilogram -- -- -- S
27. The mass of an object is 5 kg. What is its weight on the earth?

28. The Main scale reading is 3.8 Vernier scale coincidence = 5th division. No zero error. Find the length of the iron cylinder.

29. 2 x 5 = 10
30. Explain a method to find the thickness of a hollow tea cup.

31. Find the diameter of a thin wire using screw gauge.