Physics 9 Chapter 1 - Physical Quantities and Measurements - 16

Physics 9 Chapter 1 - Physical Quantities and Measurements - 16

1. A sleeve has ......................... scale over it

a) Millimetre
b) Inches
c) Micrometres
d) Centimetre

2. What is the line called along which a hollow cylinder has a millimetre scale over it?

a) Datum line
b) Thimble line
c) Index line
d) Both b and c

3. The hollow cylinder acts as a...............?

a) Bolt
b) Pliers
c) Cutter
d) Nut

4. A thimble has a threaded ..........on it?

a) Stud
b) Spindle
c) None of these
d) Ratchet

5. As the thimble completes one rotation, the spindle moves how many mm along the index line2?

a) 1 mm
b) 1 cm
c) 2 mm
d) 0.1 cm

6. What is the distance between consecutive threads on the spindle?

a) 1 mm
b) 1 cm
c) 2 mm
d) 0.1 cm

7. What is the distance between consecutive threads on the spindle called?

a) Ratchet
b) Thimble
c) Sleeve
d) Pitch

8. What is the pitch of the screw gauge?

a) 1 mm
b) 2 mm
c) 0.1 cm
d) 1 cm

9. How many divisions are present on the thimble?

a) 100
b) 55
c) 75
d) 85

10. As thimble completes one rotation, how many mm the thimble moves along the main scale?

a) 1 cm
b) 2 mm
c) 0.1 cm
d) 1 mm

11. What is the least count of a screw gauge?

a) 1 mm
b) 0.01 mm
c) 0.001 mm
d) 0.1 mm

12. What is the least count of a screw gauge in cm?

a) 0.01 cm
b) 1 cm
c) 0.001 cm
d) 0.1 cm

13. What is the relative size of a small molecule?

a) 1nm
b) 100nm
c) All of these
d) 10nm

14. What is the relative size of a virus?

a) 100nm
b) 1nm
c) All of these
d) 10nm

15. What is the relative size of a bacterium?

a) 1 micrometre
b) 0.1 micrometre
c) 100 micrometre
d) 10 micrometre

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