Questions and answers for exam Preparation

MCQs

Total Questions : 1709 | Page 171 of 171 pages

Question 1701. Two pipe systems can be said to be equivalent, when the following quantites are same______________?

friction loss and flow
length and diameter
flow and length
friction factor and diameter
velocity and diameter

Discuss Question

Answer: Option A. -> friction loss and flow
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1702. At the centre line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be_______________?

minimum
maximum
zero
negative value
could be any value

Discuss Question

Answer: Option E. -> could be any value
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1703. For pipes, laminar flow occurs when Roynolds number is__________________?

less than 2000
between 2000 and 4000
more than 4000
less than 4000
none of the above

Discuss Question

Answer: Option A. -> less than 2000
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1704. In a forced vortex, the velocity of flow everywhere within the fluid is__________________?

maximum
minimum
zero
non-zero finite
unpredictable

Discuss Question

Answer: Option D. -> non-zero finite
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1705. Select the correct statement___?

Local atmospheric pressure depends upon elevation of locality only
Standard atmospheric pressure is the mean local atmospheric pressure a* sea level
Local atmospheric pressure is always below standard atmospheric pressure
A barometer reads the difference be-tween local and standard atmospheric pressure
Gauge piessure is equal to atmospheric pressure plus instrument reading

Discuss Question

Answer: Option B. -> Standard atmospheric pressure is the mean local atmospheric pressure a* sea level
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1706. Choose the wrong statement_?

The center of buoyancy is located at the center of gravity of the displaced liquid
For stability of a submerged body, the center of gravity of body must lie directly below the center of buoyancy
If e.g. and center of buoyancy coincide, the submerged body must lie at neutral equilibrium for all positions
For stability of floating cylinders or spheres, the e.g. of body must lie below the center of buoyancy
All floating bodies are stable

Discuss Question

Answer: Option E. -> All floating bodies are stable
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1707. Choose the wrong statement__?

any weight, floating or immersed in a liquid, is acted upon by a buoyant force
Buoyant force is equal to the weight of the liquid displaced
The point through which buoyant force acts, is called the center of buoyancy
Center of buoyancy is located above the center of gravity of the displaced liquid v
Relative density of liquids can be determined by means of the depth of flotation of hydrometer

Discuss Question

Answer: Option D. -> Center of buoyancy is located above the center of gravity of the displaced liquid v
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1708. Choose the wrong statement___?

fluids are capable of flowing
fluids conform to the shape of the con-taining vessels
when in equilibrium, fluids cannot sustain tangential forces
when in equilibrium, fluids can sustain shear forces
fluids have some degree of compressibility and offer little resistance to form

Discuss Question

Answer: Option D. -> when in equilibrium, fluids can sustain shear forces
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1709. Choose the wrong statement________________?

Viscosity of a fluid is that property which determines the amount of its resistance to a shearing force
Viscosity is due primarily to interaction between fluid molecules
Viscosity of liquids decreases with in-crease in temperature
Viscosity of liquids is appreciably affected by change in pressure
Viscosity is expressed as poise, stoke, or saybolt seconds

Discuss Question

Answer: Option D. -> Viscosity of liquids is appreciably affected by change in pressure
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!