**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 ?****A. Head & discharge**

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

**NOTEIF YOU THINK ANY OF THE MCQ ABOVE IS WRONG.PLEASE COMMENT WITH CORRECT ANSWER AND ITS DETAIL EXPLANATION IN COMMENT BOX.THANK YOU**