64. The flow error in case of normal nozzles is of the order of :
A.0.001
B.0.002
C.0.005
D.0.01

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65. Which of the following flow meter maintains a constant pressure differential but varies the orifice area with flow
A.Ledoux bell
B.Variable area
C.Straightening vane
D.Variable head

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66. Flow in open channels is measured by using :
A.Nozzle
B.Orifice plate
C.Propeller
D.Weir

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67. For measuring air flow, following meter is often used :
A.Vane-type or anemometer
B.Electro magnetic flow meter
C.Vortex-shedding meter
D.Ultrasonic flow meter

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68. Laser droppler anemometer is used to measure :
A.Pressure
B.Velocity
C.Level
D.Density

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69. In which flow device the pressure loss is minimum :
A.Orifice plate
B.Dall tube.
C.Variable orifice meter
D.Venturi tube

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70. Pick out the odd flow measuring device among the following :
A.Positive displacement type
B.Hydraulic flume.
C.Sliding vane type
D.Turbine type

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