R4RIN – MCQs, Mock Tests | Civil Engineering Fluid Mechanics MCQ

The atmospheric pressure at sea level is

1. 360 mm of mercury
2. 600 mm of mercury
3. 660 mm of mercury
4. 760 mm of mercury

✅ Correct Answer: 4

A flow in which the quantity of liquid flowing per second is constant is called

1. Turbulent flow
2. Steady flow
3. Streamline flow
4. Unsteady flow

✅ Correct Answer: 3

The science that considers the forces causing flow of fluids is known as

1. Statics of fluid
2. Dynamics of fluid
3. Kinematics of fluid
4. None of these

✅ Correct Answer: 2

The dynamics of fluid in which normal stresses and shear stresses in all the three mutually perpendicular directions is considered is known as

1. Bernoulli's theory
2. Euler's theory
3. Reynolds theory
4. Navier-Stokes theory

✅ Correct Answer: 4

The depth of flow of water in a channel corresponding to the minimum specific energy is known as

1. Hydraulic gradient line
2. Hydraulic radius
3. Critical depth
4. None of the above

✅ Correct Answer: 3

Stoke is the unit of

1. Kinematic viscocity
2. Dynamic viscocity
3. Specific volume
4. Specific weight

✅ Correct Answer: 1

Newton's law of viscocity states that shear stress is directly proportional to

1. Velocity gradient
2. Viscocity
3. Shear strain
4. Velocity

✅ Correct Answer: 1

Dimension of dynamic viscocity is

1. MLT-1
2. MLT-2
3. ML2T-1
4. ML-1T-1

✅ Correct Answer: 4

The property of water to wet a solid surface when it comes in contact is known as

1. Capillary action
2. Vapour pressure
3. Viscocity
4. Surface tension

✅ Correct Answer: 1

1 pascal pressure is equal to

1. 1 m water pressure
2. 10.01 m water pressure
3. 0.01 m water pressure
4. 0.0001 m water pressure

✅ Correct Answer: 4

A Newtonian fluid is defined as the fluid which

1. obeys Newton's law of viscosity
2. is incompressible and viscous
3. is compressible and non viscous
4. is highly viscous

✅ Correct Answer: 1

Maximum loss of head in flow through pipe is due to

1. an outlet
2. friction
3. sudden contraction
4. sudden enlargement

✅ Correct Answer: 2

The viscosity of a gas

1. is independent of pressure for very high pressure intensities
2. is independent of temperature
3. increases with increase in temperature
4. decreases with increase in temperature

✅ Correct Answer: 3

The motion of air mass in a tornado is a

1. forced vortex at centre and free vortex outside
2. free vortex at centre and forced vortex outside
3. forced vortex motion
4. free vortex motion

✅ Correct Answer: 1

Apart from inertia force, which of the following forces is most important in motion of submarines under water?

1. surface tension force
2. compressive force
3. gravity force
4. viscous force

✅ Correct Answer: 4

Equation of continuity is based on the principle of conservation of

1. momentum
2. energy
3. mass
4. none of the above

✅ Correct Answer: 3

The reciprocal of coefficient of compressibility is know n as

1. bulk modulus of elasticity
2. capillary action
3. viscocity
4. vapour pressure

✅ Correct Answer: 1

Surface tension is a

1. force per unit volume
2. force per unit surface area
3. llne force
4. all the above

✅ Correct Answer: 3

For measuring small difference of pressure

1. mercury manometers are used
2. micromanometer is used
3. differential manometer is advantageous
4. simple manometer is preferred

✅ Correct Answer: 2