Explore topic-wise MCQs in Fluid Mechanics.

This section includes 19 Mcqs, each offering curated multiple-choice questions to sharpen your Fluid Mechanics knowledge and support exam preparation. Choose a topic below to get started.

1.

Estimate the type of flow in a channel having cross sectional area of 50m2 and top of the channel is 5m. The mean velocity of flow is 0.1m/s and the absolute viscosity of water is 0.625 N-s/m2.

A. Laminar
B. Turbulent
C. Transition
D. Steady
Answer» D. Steady
Discussion
2.

Calculate the aspect ratio having channel width of 6m and depth of 8m.

A. 0.75m
B. 1.33m
C. 1.50m
D. 1.68m
Answer» C. 1.50m
Discussion
3.

Calculate the Froude’s number for a channel having discharge of 261.03m3/s, cross sectional area of 42m2 and the top width being 6m.

A. 0.65
B. 0.72
C. 0.38
D. 0.75
Answer» E.
Discussion
4.

Estimate the section factor for a channel section having cross sectional area of 40m2 and hydraulic depth of 6m.

A. 94.3
B. 95.6
C. 97.9
D. 100
Answer» D. 100
Discussion
5.

Calculate the mean hydraulic depth of a channel having top width of 7m and cross sectional area of 35m2.

A. 4m
B. 5m
C. 6m
D. 7m
Answer» C. 6m
Discussion
6.

Calculate the mean hydraulic radius for a channel having 20m2 cross sectional area and 50m of wetted perimeter.

A. 0.4m
B. 0.5m
C. 0.6m
D. 0.7m
Answer» B. 0.5m
Discussion
7.

What is the Froude’s number for a channel having mean velocity 4.34 m/s and mean hydraulic depth of 3m?

A. 0.4m
B. 0.6m
C. 0.7m
D. 0.8m
Answer» E.
Discussion
8.

The Froude’s number for a flow in a channel section is 1. What type of flow is it?

A. Sub Critical
B. Critical
C. Super critical
D. Tranquil
Answer» C. Super critical
Discussion
9.

CALCULATE_THE_ASPECT_RATIO_HAVING_CHANNEL_WIDTH_OF_6M_AND_DEPTH_OF_8M.?$

A. 0.75m
B. 1.33m
C. 1.50m
D. 1.68m
Answer» C. 1.50m
Discussion
10.

CALCULATE_THE_FROUDE‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ¬•S_NUMBER_FOR_A_CHANNEL_HAVING_DISCHARGE_OF_261.03M3/S,_CROSS_SECTIONAL_AREA_OF_42M2_AND_THE_TOP_WIDTH_BEING_6M.?$#

A. 0.65
B. 0.72
C. 0.38
D. 0.75
Answer» E.
Discussion
11.

Estimate the type of flow in a channel having cross sectional area of 50m2 and top of the channel is 5m. The mean velocity of flow is 0.1m/s and the absolute viscosity of water is 0.625 N-s/m2.$

A. Laminar
B. Turbulent
C. Transition
D. Steady
Answer» D. Steady
Discussion
12.

Estimate the section factor for a channel section having cross sectional area of 40m2 and hydraulic depth of 6m?

A. 94.3
B. 95.6
C. 97.9
D. 100
Answer» D. 100
Discussion
13.

Calculate the mean hydraulic depth of a channel having top width of 7m and cross sectional area of 35m2.

A. 4m
B. 5m
C. 6m
D. 7m
Answer» C. 6m
Discussion
14.

Calculate the mean hydraulic radius for a channel having 20m2 cross sectional area and 50m of wetted perimeter.

A. 0.4m
B. 0.5m
C. 0.6m
D. 0.7m
Answer» B. 0.5m
Discussion
15.

What is the Froude’s number for a channel having mean velocity 4.34 m/s and mean hydraulic depth of 3m?$

A. 0.4m
B. 0.6m
C. 0.7m
D. 0.8m
Answer» E.
Discussion
16.

The Froude’s number for a flow in a channel section is 1. What type of flow is it?$

A. Sub Critical
B. Critical
C. Super critical
D. Tranquil
Answer» C. Super critical
Discussion
17.

The ratio of inertia force and gravitational force is called as ______

A. Reynolds number
B. Stokes number
C. Froude’s number
D. Euler’s number
Answer» D. Euler‚Äö√Ñ√∂‚àö√ë‚àö¬•s number
Discussion
18.

The Reynolds number for a flow in a channel is 1000. What type of flow is it?

A. Laminar
B. Turbulent
C. Transition
D. Steady
Answer» D. Steady
Discussion
19.

The flow characteristics of a channel does not change with time at any point. What type of flow is it?

A. Steady flow
B. Uniform flow
C. Laminar flow
D. Turbulent flow
Answer» B. Uniform flow
Discussion