Question – 1
1. The third class lever is used to increase _________.
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A. force or distance
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B. force only
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C. distance
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D. None of the above
- Answer:C
- Answer Explanation:
Question – 2
2. ‘Liquids conform themselves to the shape of their container’ is the ________ principle of hydraulics.
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A. first
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B. second
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C. third
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D. fourth
- Answer:B
- Answer Explanation:
Question – 3
3. A man pushes a car with a force of 200N over a distance of 200 meters. The work done is ________.
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A. 400 joules
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B. 4000 joules
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C. 40000 joules
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D. 6000 joules
- Answer:C
- Answer Explanation:
Question – 4
4. If the normal force of an object is higher, the friction developed with the surface on which it rests is _______.
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A. less
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B. more
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C. stable
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D. less or more depending on the force
- Answer:B
- Answer Explanation:
Question – 5
5. In cemented carbides _______ is used as a binding material.
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A. cobalt
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B. nickel
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C. cadmium
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D. zinc
- Answer:A
- Answer Explanation:
Question – 6
6. ________ are used to lift cars.
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A. Wrenches
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B. Ratchets
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C. Pullers
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D. Mechanical jacks
- Answer:D
- Answer Explanation:
Question – 7
7. A ball thrown upwards starts travelling towards the ground after reaching a certain height. The downward movement of the ball is due to __________.
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A. gravitational force
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B. frictional force
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C. the speed in which ball is thrown
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D. centrifugal force
- Answer:A
- Answer Explanation:
Question – 8
8. By using a ________ mechanical advantage can be gained.
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A. screw
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B. protractor
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C. lever
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D. pump
- Answer:C
- Answer Explanation:
Question – 9
9. Dovetail is a kind of ______.
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A. saw
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B. lever
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C. axle
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D. screw
- Answer:A
- Answer Explanation:
Question – 10
10. If a car fails to start due to dead battery ______ can be used to get charge from another battery.
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A. a new starter
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B. jumper cables
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C. fuels
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D. fuses
- Answer:B
- Answer Explanation:
Question – 11
11. ________ is used for smoothing or leveling wood.
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A. chisel
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B. level
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C. plane
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D. clamp
- Answer:C
- Answer Explanation:
Question – 12
12. In an engine ________ is used in order to reduce friction.
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A. water
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B. gas
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C. lubricating oil
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D. None of these
- Answer:C
- Answer Explanation:
Question – 13
13. The mechanical advantage of a lever can be calculated using the formula _________.
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A. effort / load
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B. load /effort
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C. load x effort
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D. Both A and C
- Answer:B
- Answer Explanation:
Question – 14
14. In ideal fluid ______ is encountered by displacement.
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A. high resistance
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B. low resistance
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C. no resistance
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D. varying resistance
- Answer:C
- Answer Explanation:
Question – 15
15. Adding _______ can increase resistance to corrosion of steel.
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A. sulphur and nickel
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B. chromium and nickel
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C. phosphorous
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D. vanadium and zinc
- Answer:B
- Answer Explanation: