Home - Mechanical Engineering - Hydraulics And Fluid Mechanics

Hydraulics And Fluid Mechanics Online Exam Quiz

Important questions about Hydraulics And Fluid Mechanics. Hydraulics And Fluid Mechanics MCQ questions with answers. Hydraulics And Fluid Mechanics exam questions and answers for students and interviews.

1. A flow in which __________ force is dominating over the viscosity is called turbulent flow.

Options

A : elastic

B : surface tension

C : viscous

D : inertia

2. When the pressure intensity at a point is less than the local atmospheric pressure, then the difference of these two pressures is called vacuum pressure.

Options

A : Agree

B : Disagree

C :

D :

4. The discharge through an external mouthpiece is given by (where a = Cross-sectional area of the mouthpiece, and H = Height of liquid above the mouthpiece)

Options

A : 0.855 a 2 gH

B : 1.855 aH 2 g

C : 1.585 a 2 gH

D : 5.85 aH 2 g

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

Options

A : Agree

B : Disagree

C :

D :

6. In an external or internal mouthpiece, the absolute pressure head at vena contracta is zero when atmospheric pressure head is 10.3 m of water.

Options

A : Correct

B : Incorrect

C :

D :

7. A flow through a long pipe at constant rate is called

Options

A : steady uniform flow

B : steady non-uniform flow

C : unsteady uniform flow

D : unsteady non-uniform flow

8. The Francis formula for the discharge over Cippoletti weir is

Options

A : 1.84 LH 1/2

B : 1.84 LH

C : 1.84 LH 3/2

D : 1.84 LH 5/2

9. A flow in which each liquid particle does not have a definite path and the paths of individual particles also cross each other, is called turbulent flow.

Options

A : Agree

B : Disagree

C :

D :

10. The Euler's equation for the motion of liquids is based upon the assumption that

Options

A : the fluid is non - viscous, homogeneous and incompressible

B : the velocity of flow is uniform over the section

C : the flow is continuous, steady and along the stream line

D : all of the above

1. A body floating in a liquid is said to be in a stable equilibrium, if its metacentre coincides with its centre of gravity.

Options

A : True

B : False

C :

D :

2. When an internal mouthpiece is running free, the discharge through the mouthpiece is (where a = Area of mouthpiece, and H = Height of liquid above the mouthpiece)

Options

A : 0.5 a 2 gH

B : 0.707 a 2 gH

C : 0.855 a 2 gH

D : a 2 gH

3. A piezometer tube is used only for measuring

Options

A : low pressure

B : high pressure

C : moderate pressure

D : vacuum pressure

4. A venturiflume is a flumed structure constructed across a channel by restricting its width.

Options

A : True

B : False

C :

D :

5. The velocity corresponding to Reynold number of 2000 is called

Options

A : sub-sonic velocity

B : super-sonic velocity

C : lower critical velocity

D : higher critical velocity

6. The siphon will work satisfactorily, if the minimum pressure in the pipe is __________ vapour pressure of liquid.

Options

A : equal to

B : less than

C : more than

D :

7. All the gases are considered to have compressible flow and all the liquids are considered to have incompressible flow.

Options

A : Correct

B : Incorrect

C :

D :

8. Select the correct statement

Options

A : Weber's number is the ratio of inertia force to elastic force.

B : Weber's number is the ratio of gravity force to surface tension force.

C : Weber's number is the ratio of viscous force to pressure force.

D : Weber's number is the ratio of inertia force to surface tension force.

9. The discharge of a depressed nappe is 6 to 7 percent __________ that of a free nappe.

Options

A : less than

B : more than

C :

D :

10. Euler's number is the ratio of __________ force to pressure force.

Options

A : inertia

B : gravity

C : viscous

D :

2. The difference between the notch and weir is that the notch is of bigger size and the weir is of a smaller size.

Options

A : Agree

B : Disagree

C :

D :

Mechanical Engineering more Online Exam Quiz

Copyright © 2021
Exam-GK-MCQ-Questions.Com | Contact Us | Privacy Policy | Terms of Use | Sitemap | 0.018487930297852