Question 61 : In a/an __________ , the flow rate of fluids is obtained by measuring the difference between the impact and the static pressure.
1. rotameter
2. pitot tube
3. venturimeter
4. flow nozzle
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Question 62 : In a fluidised bed reactor
1. temperature gradients are very high.
2. hot spots are formed.
3. temperature is more or less uniform.
4. segregation of the solids occurs.
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Question 63 : The flow of a liquid through tapering pipe at a constant rate is an example of __________ flow.
1. steady non uniform
2. steady uniform
3. unsteady uniform
4. unsteady non uniform
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Question 64 : A perfect gas
1. does not satisfy PV = nRT.
2. can't develop shear stresses.
3. is incompressible and has zero viscosity.
4. has constant specific heat.
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Question 65 : Pascal law is not applicable for a/an __________ fluid.
1. static
2. accelerating frictionless
3. none of these
4. uniformly moving
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Question 66 : Which of the following quantities are computed by using the hydraulic radius for non-circular ducts ?
1. Reynold number, relative roughness and head loss.
2. Velocity and relative roughness.
3. Reynolds number and friction factor.
4. Head loss and velocity.
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Question 67 : The centre of pressure is
1. a point on the line of action of the resultant force.
2. always above the centroid of the area.
3. always below the centroid of the area.
4. at the centroid of the submerged area.
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Question 68 : Centre of pressure in an immersed body is __________ the centre of gravity.
1. above
2. below
3. at
4. either above or below; depends on the liquid density
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Question 69 : Remote control valve is a __________ valve.
1. needle
2. gate
3. globe
4. butterfly
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Question 70 : The most suitable flow measuring device for the fluid flow measurement in a very large diameter pipeline is a
1. weir
2. Kennison nozzle
3. pitot tube
4. V-notch
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