Questions and answers for exam Preparation

MCQs

Total Questions : 3147 | Page 31 of 315 pages

Question 301. For a perfect incompressible liquid, flowing in a continuous stream, the total energy of a particle remains the same, while the particle moves from one point to another. This statement is called

Continuity equation
Bernoulli’s equation
Pascal’s law
Archimedes’s principle

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Answer: Option B. -> Bernoulli’s equation

Question 302. A moving fluid mass may be brought to a static equilibrium position, by applying an imaginary inertia force of the same magnitude as that of the accelerating force but in the opposite direction. This statement is called

Pascal’s law
Archimedes’s principle
D-Alembert’s principle
None of these

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Answer: Option C. -> D-Alembert’s principle

Question 303. The force exerted by a moving fluid on an immersed body is directly proportional to the rate of change of momentum due to the presence of the body. This statement is called

Newton's law of motion
Newton's law of cooling
Newton's law of viscosity
Newton's law of resistance

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Answer: Option D. -> Newton's law of resistance

Question 304. Which of the following statement is wrong?

A flow whose streamline is represented by a curve is called two dimensional flow.
The total energy of a liquid particle is the sum of potential energy, kinetic energy and pressure energy.
The length of divergent portion in a Venturimeter is equal to the convergent portion.
A pitot tube is used to measure the velocity of flow at the required point in a pipe.

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Answer: Option C. -> The length of divergent portion in a Venturimeter is equal to the convergent portion.

Question 305. Which of the following statement is wrong?

The reaction turbines are used for low head and high discharge
The angle of taper on draft tube is less than 8°
An impulse turbine is generally fitted slightly above the tail race
A Francis turbine is an impulse turbine

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Answer: Option D. -> A Francis turbine is an impulse turbine

Question 306. An open vessel of water is accelerated up an inclined plane. The free water surface will

Be horizontal
Make an angle in direction of inclination of inclined plane
Make an angle in opposite direction to inclination of inclined plane
Any one of above is possible

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Answer: Option C. -> Make an angle in opposite direction to inclination of inclined plane

Question 307. Newton's law of viscosity is a relationship between

Pressure, velocity and temperature
Shear stress and rate of shear strain
Shear stress and velocity
Rate of shear strain and temperature

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Answer: Option B. -> Shear stress and rate of shear strain

Question 308. The rise of liquid along the walls of a revolving cylinder about the initial level is _________ the depression of the liquid at the axis of rotation.