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Engineering :: Hydraulics and Fluid Mechanics

41.  When the pressure intensity at a point is less than the local atmospheric pressure, then the difference of these two pressures is called vacuum pressure.
A. Agree B. Disagree
42.  The vacuum pressure is always the negattive gauge pressure.
A. Yes B. No
43.  The absolute pressure is equal to
A. gauge pressure + atmospheric pressure B. gauge pressure - atmospheric pressure
C. atmospheric pressure - gauge pressure D. gauge pressure - vacuum pressure
44.  The pressure less than atmospheric pressure is known as
A. suction pressure B. vacuum pressure
C. negative gauge pressure D. all of these
45.  Gauge pressure at a point is equal to the absolute pressure
A. plus B. minus
46.  The pressure of a liquid measured with the help of a piezometer tube is
A. vacuum pressure B. gauge pressure
C. absolute pressure D. atmospheric pressure
47.  The vacuum pressure can be measured with the help of a piezometer tube.
A. True B. False
48.  The pressure measured with the help of a piezometer tube is in
A. N / mm2 B. N / m2
C. head of liquid D. all of these
49.  A piezometer tube is used only for measuring
A. low pressure B. high pressure
C. moderate pressure D. vacuum pressure
50.  The liquid used in manometers should have
A. low density B. high density
C. low surface tension D. high surface tension

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