Fluid Mechanics MCQ Questions & Answers

91

The losses in open channel flow generally vary as the

A) Inverse of the roughness B) First power of the roughness C) Square of the velocity D) Inverse square of hydraulic radius

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

92

What is the unit of kinematic viscosity in SI unit?

A) m²/sec B) N/m².sec C) Kg.sec/m D) None of these

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

93

If Blausius or Darcey friction factor is 'f₁' then the Fanning friction factor is equal to

A) $$\frac{{{{\text{f}}_1}}}{4}$$ B) 4f₂ C) 2f₁ D) $$\frac{{{{\text{f}}_1}}}{2}$$

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

94

Nature of fluid flow during the opening of a valve in a pipeline is

A) Laminar B) Unsteady C) Steady D) Uniform

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

95

The equivalent diameter for pressure drop calculation for a fluid flowing through a rectangular cross-section channels having sides 'x' & 'y' is given by

A) $$\frac{{2{\text{xy}}}}{{{\text{x}} + {\text{y}}}}$$ B) $$\frac{{{\text{xy}}}}{{{\text{x}} + {\text{y}}}}$$ C) $$\frac{{{\text{x}} + {\text{y}}}}{{2{\text{xy}}}}$$ D) $$\frac{{{\text{x}} + {\text{y}}}}{{{\text{xy}}}}$$

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

96

Pick out the wrong statement about cavitation.

A) Sudden reduction of pressure in a fluid flow system caused by flow separation, vortex formation or abrupt closing of valve leads to cavitation B) Cavitation may be caused due to boiling of liquid by decreasing the pressure resulting in formation & collapse of vapor cavities C) Cavitation begins at higher static pressure and lower velocity in larger diameter pipelines resulting in audible noise D) Large scale cavitation can not damage pipeline, restrict fluid flow and damage steam turbine blades

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

97

__________ forces act on a particle moving through a stationary fluid.

A) Gravity B) Drag C) Buoyant D) All of the above

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

98

Stoke's law is valid, when N_Re,p is less than

A) 2 B) 100 C) 2100 D) 700

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

99

Pick out the wrong statement.

A) The eddy viscosity is a function of the type of turbulence involved B) The eddy viscosity is a fluid property C) The viscosity of gas increases with increase in temperature D) The viscosity of a liquid increases with decrease in temperature

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

100

Correction for capillary effect in manometers (used for pressure measurement) need not be applied, if diameter of the manometer tube is __________ mm.

A) < 4 B) > 4 C) > 12.5 D) < 10

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

Fluid Mechanics MCQ Questions & Answers | Chemical Engineering