A. Very low speeds
B. Smaller discharge
C. Higher capital &maintenance cost
D. High vibrations
A. Provided in the discharge line
B. Generally a globe valve
C. Provided to prevent liquid from backing up through the pump when the pump is turned off or
accidently stops running
D. All A., B. and C.
A. 1/D
B. 1/D2
C. 1/D5
D. D2
A. 100
B. 200
C. 320
D. 160
A. Velocity and relative roughness
B. Head loss and velocity
C. Reynold number, relative roughness and head loss
D. Reynolds number and friction factor
A. Venturimeter
B. Orificemeter
C. Rotameter
D. Pitot tube
A. Δp/ρ = 4f (L/D) (V2/2gc)
B. Δp = 32 (μLV/gc. D2)
C. Δp/L = 150 [(1 – ε)/ε3]. (μ.V0
2/g2cD)
D. Δp/L = 1.75 [(1 – ε)/ε3]. (ρV0
2/gcDp)
A. 20 m/sec
B. 10 m/sec
C. 5 √2 m/sec
D. 5 m/sec
A. Cd = Cc/Cv
B. Cd = Cc.Cv
C. Cd = Cv/ Cc
D. None of these
A. Newtonian
B. Viscous
C. Dilatant
D. Non-viscous