15. Which of the following is not the unit of distance ?
A.Angstrom
B.Milestone
C.Micron
D.Millimetre

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16. Which of the following is not the unit of power ?
A.KW (kilowatt)
B.Kcal/kg-sec
C.Kcal/sec
D.Kg-m/sec

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17. Which of the following is not the unit of work, energy and heat ?
A.Kcal
B.Kg m
C.KWhr
D.Hp

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18. Which of the following is not the unit of pressure ?
A.Kg/cm2
B.Newton
C.Atmosphere
D.Mm of wcl

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19. The weight of a body is due to
A.Centripetal force of earth
B.Gravitational force of attraction towards the centre of the earth
C.Forces experienced by body in atmosphere
D.Force of attraction experienced by particles

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20. The forces, which meet at one point, but their lines of action do not lie in a plane, are called
A.Coplanar non-concurrent forces
B.Non-coplanar concurrent forces
C.Non-coplanar non-concurrent forces
D.Intersecting forces

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21. When trying to turn a key into a lock, following is applied
A.Coplanar force
B.Couple
C.Lever
D.Moment

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