A. Is an area meter
B. Is a variable head meter
C. Rotates an element at a speed determined by the velocity of the fluid in which the meter is
immersed
D. None of these
Related Mcqs:
- In centrifugal pumps, cavitation occurs, when pressure of the impeller eye or vane becomes_______________?
A. Less than atmospheric pressure
B. More than liquid vapor pressure
C. Less than liquid vapor pressure
D. More than atmospheric pressure - Hot wire anemometer is used to measure the_________________?
A. Velocity of liquids
B. Temperature of liquids
C. Velocity of gases
D. Pressure of liquids - The resistance wire used in a hot wire anemometer for conducting electrical current is made of__________________?
A. Copper
B. Tungsten
C. Chromium
D. Aluminium - In case of turbulent flow of fluid through a circular pipe, the __________________?
A. Mean flow velocity is about 0.5 times the maximum velocity
B. Velocity profile becomes flatter and flatter with increasing Reynolds number
C. Point of maximum instability exists at a distance of 2r/3 from the pipe wall (r = pipe radius)
D. Skin friction drag, shear stresses, random orientation of fluid particles and slope of velocity
profile at the wall are more - Drag force on the float of a Rotameter is (where Q = flow rate of the)__________________?
A. ∝ Q
B. ∝ √Q
C. ∝ Q2
D. Constant - Colebrook equation for friction factor in turbulent flow is given by, f-0.5 = -4 loge [(ε/D) + (1.26/NRe √F). It reduces to Nikuradse equation for a value of (ϵ/D) equal to __________________?
A. 0
B. 1
C. ∞
D. 0.5 - In case of centrifugal fan or blower, the gas capacity varies as __________________?
A. Speed
B. (Speed)2
C. (Speed)3
D. (Speed)0.5 - For ideally incompressible fluid, the Mach number will be __________________?
A. 1.5
B. 1
C. 0
D. 5 - The speed of sound in an ideal gas varies as the __________________?
A. Temperature
B. Pressure
C. Density
D. None of these - For flow through a venturi at a particular discharge, the correct relationships among velocities at point X, Y and Z would be __________________?
A. V1 < V2 < V3
B. V2 > V1 and V2 > V3
C. V1 > V2 > V3
D. None of these
