721. Draining of shallow pits or sump is done by a sump pump, which is a ______________ pump?
A. Single stage vertical
B. Centrifugal
C. Plunger
D. Diffuser

722. What causes cavitation in centrifugal pump ?
A. High suction pressure
B. Low barometric pressure
C. Low suction pressure
D. High suction velocity

723. Pitot tube measures the ______________ of a fluid?
A. Pressure
B. Average velocity
C. Average flow rate
D. Point velocity

724. Manometers measure the ______________ pressure?
A. Vacuum as well as the atmospheric
B. Difference in
C. Absolute
D. Gage

725. Choose the correct set of dimensions of viscosity that are equivalent (where, F, M, L, T are dimensions for force, mass, length and time respectively) ?
A. FL-2T, ML-1T-1
B. FLT, ML-1T-1
C. ML-1T-3, F-1L2T
D. F-1L2T-1, MLT-3

726. Which of the following two quantities when same, makes one pipe system equivalent to another pipe system ?
B. Length & discharge
C. Length & diameter
D. Friction factor & diameter

727. Pick out the wrong statement pertaining to fluid flow ?
A. The ratio of average velocity to the maximum velocity for turbulent flow of Newtonian fluid
in circular pipes is 0.5
B. The Newtonian fluid velocity in a circular pipe flow is maximum at the centre of the pipe
C. Navier-Stokes equation is applicable to the analysis of viscous flows
D. Hagen-Poiseuille equation is applicable to the laminar flow of Newtonian fluids

728. What is the normal range of exit cone angle of a Venturimeter ?
A. 2 to 5
B. 7 to 15
C. 15 to 25
D. >25

729. Various efficiencies of a centrifugal pump are related as (where, εm = mechanical efficiency εv = volumetric efficiency. εma = manometric efficiency εo = overall efficiency) ?
A. ηma × ηm × ηv = ηo
B. ηm = ηv . ηma
C. ηma = ηm × ηv
D. ηv = ηm × ηma

730. A fluid is pumped at the rate of 10 lb/sec to a height of 55 ft. The horse power required is _____________ hp?
A. 1
B. 10/55
C. 5.5
D. 1/55

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