Font size
WorksheetsDay 49-Nov 9-worksheet-PWD-Pressure measurements & buoyancy
Total questions: 15
Worksheet time: 12mins
Which of the following expresses the correct relation between absolute and gauge pressure?
Pabs=Pgauge−Patm
Pabs=Patm−Pgauge
Pabs=Patm+Pgauge
Pabs=Pgauge
Which manometer offers the highest sensitivity for small pressure differences?
U-tube manometer
Vertical single-column manometer
Inclined single-column manometer
Differential inverted U-tube
Hydrostatic pressure at depth h is given by —
2pgh
pgh
2pgh
pgh
A body sinks in a fluid when —
Buoyant force equals weight
Buoyant force becomes zero
Weight > maximum buoyant force
Weight < buoyant force
If GM (metacentric height) decreases, the time period of oscillation —
Decreases
Increases
Remains constant
Becomes zero
Choose True or False: Vacuum pressure is pressure below atmospheric pressure.
True
False
Choose True or False: Piezometers can measure high pressures and vacuum pressures.
True
False
An inverted U-tube differential manometer is used for measuring low pressure differences.Is this statement true?
(a)
1 atm = (a) mm of Hg.
The rise of liquid in a piezometer gives the (a)
The point through which total hydrostatic force acts is (a) .
GM is positive when the metacentre lies (a) the centre of gravity.
A vertical gate 2 m × 1.5 m (width x vertical height) has its top 0.5 m below the free surface. Find the total hydrostatic force.
(a)
A wooden block (SG = 0.60) of 1.0 m × 0.50 m × 0.40 m floats with its large face horizontal. Find the immersion depth.
(a)
On suction side, a pressure gauge shows a negative pressure of 0.35 bar. If the atmospheric pressure is 76 cm of Hg and relative density of mercury is 13.6, how much of meters will it show in a water gauge?
(a)
