22.  The unit of the viscosity is
A. kg sec/m2
B. Newton sec per m2
C. Newton-sec2/m3
D. m2 per sec.

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23.  Unit of kinematic viscosity is
A. m2/sec
B. Newton sec/m2
C. Newton sec/m3
D. Kg sec/m2.

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24.  Barometres are used to measure
A. pressure in water channels, pipes etc.
B. difference in pressure at two points
C. atmospheric pressure
D. very low pressure

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25.  Piezometers are used to measure
A. pressure in water channels, pipes etc.
B. difference in pressure at two points
C. atmospheric pressure
D. very low pressure.

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26. Manometers are used to measure
A. pressure in water channels, pipes etc.
B. difference in pressure at two points
C. atmospheric pressure
D. very low pressure.

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27.  Differential manometers are used to measure
A. pressure in water channels, pipes, etc.
B. difference in pressure at two points
C. atmospheric pressure
D. very low pressure.

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28.  To measure very low pressure, we use
A. barometers
B. piezometers
C. manometers
D. differential manometers.

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