711. Which of the following is not dimension-less ?
A. Froude number
B. Kinematic viscosity
C. Pressure co-efficient
D. None of these

712. Which of the following may be termed as a variable orifice flow-meter ?
A. Rotameter
B. Pitot tube
C. V-notch
D. All A., B. and C.

713. What causes convective acceleration in fluid flow ?
A. Steep slope in flow
B. Unsteady nature of flow
C. Non-uniformity of flow
D. Turbulence in flow

714. Which of the following is a dimensionless parameter ?
A. Angular velocity
B. Specific weight
C. Kinematic viscosity
D. None of these

715. Consider a centrifugal pump having a specific impeller diameter, fixed impeller speed pumping a liquid of constant density at a particular discharge capacity. With decrease in the capacity of the pump, the _______________ decreases?
A. NPSH required
B. BHP required by the pump
C. Head of the liquid pumped
D. All A., B. and C.

716. Vena-contracta pressure tapping is at a distance _______________ from the position of an orificemeter fitted in a pipe of internal diameter ‘d’ ?
A. d
B. 0.5 d
C. 2d
D. 4d

717. A special type of liquid transporting device is the diffuser pump, in which _____________ are minimised?
A. Bearing losses
B. Disk friction
C. Shock losses
D. Cavitation

718. A spherical particle is falling slow in a viscous liquid such that Reynolds number is less than 1. Which statement is correct for this situation ?
A. Inertial and drag forces are important
B. Drag, gravitational and buoyancy forces are important
C. Drag force and gravitational forces are important
D. None of the above

719. Which of the following is the „Blasius equation‟, relating friction factor to the Reynolds number ?
A. f = 0.079.NRe-0.25
B. f-0.5 = 4.07 loge (NRef)-0.6
C. Both ‘a’ and ‘b’
D. None of these

720. In which type of fluid flow, the velocity of flow of fluid changes from point to point in the fluid at any instant ?
A. Rotational
B. Unsteady
C. Turbulent
D. Non-uniform

NOTE
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