17
42
84
1.8
✅ The correct answer is option A.
Fluid Mechanics MCQs
Which of the following has the maximum compression ratio?
Blower
Compressor
Vacuum pump
Fan
✅ The correct answer is option C.
The equation given below is called the __________ . f-0.5 = 4.07 loge (NRe√f)-0.6
Colebrook formula
Von-Karman equation
Fanning equation
None of these
✅ The correct answer is option B.
Venturimeter and orificemeter measures the __________ of the fluid.
Pressure
Maximum velocity
Average velocity
Point velocity
✅ The correct answer is option C.
Reciprocating pumps are not able to compete with the centrifugal pump for industrial use, mainly because these pumps have
Very low speeds
Smaller discharge
Higher capital &maintenance cost
High vibrations
✅ The correct answer is option C.
The ratio of the hydraulic radius to the diameter of the channel, for maximum mean velocity of flow in a circular channel, in open channel flow is
0.3
0.9
0.03
0.66
✅ The correct answer is option A.
A piezometer provided in the pipe measures
Friction factor
Static pressure
Dynamic pressure
None of these
✅ The correct answer is option B.
A Newtonion liquid (ρ = density, μ = viscosity) is flowing with velocity v in a tube of diameter ‘D’. Let Δp be the pressure drop across the length ‘L’. For a laminar flow, Δp is proportional to
L ρv²/D
L μ;V/D²
D ρv²/L
Μ V/L
✅ The correct answer is option A.
Specific speed for a centrifugal pump is
N√Q/H3/4
N√Q/H2/3
N√Q/H1/4
N√Q/H
✅ The correct answer is option A.
The ratio of the depth of flow to the hydraulic radius for the most economical trapezoidal section, in open channel flow is
0.5
1
1.5
2
✅ The correct answer is option D.