Hydraulics And Fluid Mechanics MCQ Questions & Answers | Mechanical Engineering Page-4 section-6

Section 1 Section 2 Section 3 Section 4 Section 5 Section 6 Section 7

31.
Francis, Kaplan and propeller turbines fall under the category of

A. Impulse turbines

B. Reaction turbines

C. Axial flow turbines

D. Mixed flow turbines

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32.
Which of the following pump is successfully used for lifting water to the boilers?

A. Centrifugal pump

B. Reciprocating pump

C. Jet pump

D. Airlift pump

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33.
The value of mass density in kg-sec-V-m⁴ for water at 0°C is

A. 1

B. 1000

C. 100.9

D. 101.9

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34.
If a pump is handling water and is discharging a certain flow Q at a constant total dynamic head requiring a definite B.H.P., the same pump when handling a liquid of specific gravity 0.75 and viscosity nearly same as of water would discharge

A. Same quantity of liquid

B. 0.75Q

C. $$\frac{{\text{Q}}}{{0.75}}$$

D. 1.5Q

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35.
The torque required to overcome viscous resistance of a collar bearing is (where R₁ and R₂ = External and internal radius of collar)

A. $$\frac{{\mu {\pi ^2}{\text{N}}}}{{60{\text{t}}}}\left( {{{\text{R}}_1} - {{\text{R}}_2}} \right)$$

B. $$\frac{{\mu {\pi ^2}{\text{N}}}}{{60{\text{t}}}}\left( {{\text{R}}_1^2 - {\text{R}}_2^2} \right)$$

C. $$\frac{{\mu {\pi ^2}{\text{N}}}}{{60{\text{t}}}}\left( {{\text{R}}_1^3 - {\text{R}}_2^3} \right)$$

D. $$\frac{{\mu {\pi ^2}{\text{N}}}}{{60{\text{t}}}}\left( {{\text{R}}_1^4 - {\text{R}}_2^4} \right)$$

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36.
In a reaction turbine, the draft tube is used

A. To run the turbine full

B. To prevent air to enter the turbine

C. To increase the head of water by an amount equal to the height of the runner outlet above the tail race

D. To transport water to downstream

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37.
In reaction turbine, draft tube is used

A. To transport water downstream without eddies

B. To convert the kinetic energy to flow energy by a gradual expansion of the flow cross-section

C. For safety of turbine

D. To increase flow rate

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38.
The flow rate in gear pump

A. Increases with increase in pressure

B. Decreases with increase in pressure

C. More or less remains constant with increase in pressure

D. Unpredictable

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39.
The increase of temperature results in

A. Increase in viscosity of gas

B. Increase in viscosity of liquid

C. Decrease in viscosity of gas

D. Decrease in viscosity of liquid

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40.
Runaway speed of a hydraulic turbine is

A. Full load speed

B. The speed at which turbine runner will be damaged

C. The speed if the turbine runner is allowed to revolve freely without load and with the wicket gates wide open

D. The speed corresponding to maximum overload permissible

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Hydraulics And Fluid Mechanics MCQ Questions & Answers | Mechanical Engineering

31. Francis, Kaplan and propeller turbines fall under the category of

Answer & Solution

32. Which of the following pump is successfully used for lifting water to the boilers?

Answer & Solution

33. The value of mass density in kg-sec-V-m4 for water at 0°C is

Answer & Solution

34. If a pump is handling water and is discharging a certain flow Q at a constant total dynamic head requiring a definite B.H.P., the same pump when handling a liquid of specific gravity 0.75 and viscosity nearly same as of water would discharge

Answer & Solution

35. The torque required to overcome viscous resistance of a collar bearing is (where R1 and R2 = External and internal radius of collar)

Answer & Solution

36. In a reaction turbine, the draft tube is used

Answer & Solution

37. In reaction turbine, draft tube is used

Answer & Solution

38. The flow rate in gear pump

Answer & Solution

39. The increase of temperature results in

Answer & Solution

40. Runaway speed of a hydraulic turbine is

Answer & Solution

Read More Section(Hydraulics and Fluid Mechanics in ME)

31.
Francis, Kaplan and propeller turbines fall under the category of

32.
Which of the following pump is successfully used for lifting water to the boilers?

33.
The value of mass density in kg-sec-V-m⁴ for water at 0°C is

34.
If a pump is handling water and is discharging a certain flow Q at a constant total dynamic head requiring a definite B.H.P., the same pump when handling a liquid of specific gravity 0.75 and viscosity nearly same as of water would discharge

35.
The torque required to overcome viscous resistance of a collar bearing is (where R₁ and R₂ = External and internal radius of collar)

36.
In a reaction turbine, the draft tube is used

37.
In reaction turbine, draft tube is used

38.
The flow rate in gear pump

39.
The increase of temperature results in

40.
Runaway speed of a hydraulic turbine is