A low pressure of the order of 10-10 torr is to be measured in a chamber. Which of the following device can be used for this?
A.Manometer
B.Bourdon vacuum gauge
C.Pirani gauge
D.Ionisation chamber
E.McLeod gauge
Category: Fluid Mechanics and Hydraulic Machines Mcqs
Which one of the following is not a disadvantage due to a Buttress dam?
A.The structure being self-sealing, it is not sensitive to accidental rise in water level above the designed full supply level
B.Bearing stress of the foundtions are higher
C.Problems arising out of large number of joints in the dam
D.Significance of volume changes of thin members
E.Overflow arrangements
Stremlines, streak lines and path lines are all identical in case of
A.Uniform flow
B.Non-uniform flow
C.Rotation flow
D.Steady flow
E.Unsteady flow
A turbine model test with 260 mm diameter showed an efficiency of 90 percent. The efficiency that can be expected from a 1.2 m diameter impeller is
A.90 percent
B.81 percent
C.91 percent
D.93.18 percent
E.None of the above
Which of the following gauge can be used for the measurement of velocity of an aircraft?
A.Pilot tube
B.Ionization chamber
C.Venturimeter
D.Hot wire anemometer
E.Inclined manometer
Which type of pump is different from the others?
A.Simplex pump
B.Plunger pump
C.Piston pump
D.Duplex pump
E.Centrifugal pump
An air vessel is provided at the summit in a syphone to
A.Regulate the flow
B.Increase discharge
C.Increase velocity
D.Avoid an interruption in the flow
E.Maintain pressure difference
In order to avoid a correction for the effect of capillarity in manometers, the diameter of the tube should be
A.Less than 1 mm
B.Less than 3 mm
C.Less than 4.5 mm
D.Greater than or equal to 6 mm
E.None of the above
The size of a venturimeter is specified by
A.fluid pressure
B.Discharge channel
C.pipe diameter
D.pipe diameter and throat diameter
A flow is said to be laminar when
A.The fluid particles moves in a zig-zag way
B.The Reynold number is high
C.The fluid particles move in layers parallel to the boundary
D.None of the above
