Explore topic-wise MCQs in Fluid Mechanics.

This section includes 14 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.

What will be the depth (in m) of the centre of pressure for a vertical square lamina submerged in a tank of oil (S=0.8) as shown in the figure?

A. 1.45
B. 1.65
C. 1.75
D. 1.95
Answer» D. 1.95
Discussion
2.

The upper and lower edges of a square lamina of length 4 m are at a depths of 1 m and 3 m respectively in water. What will be the total pressure (in kN) on the lamina?

A. 156.96
B. 235.44
C. 313.92
D. 392.4
Answer» D. 392.4
Discussion
3.

The upper and lower edges of a square lamina of length 4 m are at a depths of 1 m and 3 m respectively in water. What will be the depth (in m) of the centre of pressure?

A. 1.33
B. 1.57
C. 2.17
D. 2.33
Answer» D. 2.33
Discussion
4.

What will be the total pressure (in kN) on a vertical square lamina submerged in a tank of oil (S=0.9) as shown in the figure?

A. 26.5
B. 35.3
C. 44.1
D. 61.7
Answer» D. 61.7
Discussion
5.

A square lamina (each side equal to 2m) is submerged vertically in water such that the upper edge of the lamina is at a depth of 0.5 m from the free surface. What will be the depth (in m) of the centre of pressure?

A. 1.32
B. 1.42
C. 1.52
D. 1.72
Answer» E.
Discussion
6.

A square lamina (each side equal to 2m) with a central hole of diameter 1m is submerged vertically in water such that the upper edge of the lamina is at a depth of 0.5 m from the free surface. What will be the total water pressure (in kN) on the lamina?

A. 15.77
B. 31.54
C. 47.31
D. 63.08
Answer» D. 63.08
Discussion
7.

A square lamina (each side equal to 2m) is submerged vertically in water such that the upper edge of the lamina is at a depth of 0.5 m from the free surface. What will be the total water pressure (in kN) on the lamina?

A. 19.62
B. 39.24
C. 58.86
D. 78.48
Answer» D. 78.48
Discussion
8.

A rectangular lamina of width b and depth d is submerged vertically in water, such that the upper edge of the lamina is at a depth h from the free surface. What will be the expression for the depth of the centroid (G)?

A. h
B. h + d
C. h + d ⁄ 2
D. h + d / 2
Answer» D. h + d / 2
Discussion
9.

A cubic tank is completely filled with water. What will be the ratio of the hydrostatic force exerted on the base and on any one of the vertical sides?

A. 1:1
B. 2:1
C. 1:2
D. 3:2
Answer» C. 1:2
Discussion
10.

A beaker contains water up to a height of h. What will be the location of the centre of pressure?

A. h⁄3 from the surface
B. h⁄2 from the surface
C. 2h⁄3 from the surface
D. h⁄6 from the surface
Answer» D. h⁄6 from the surface
Discussion
11.

Which of the following is the correct relation between centroid (G) and the centre of pressure (P) of a plane submerged in a liquid?

A. G is always below P
B. P is always below G
C. G is either at P or below it.
D. P is either at G or below it.
Answer» E.
Discussion
12.

Equal volume of two liquids of densities ρ1 and ρ2 are poured into two identical cuboidal beakers. The hydrostatic forces on the respective vertical face of the beakers are F1 and F2 respectively. If ρ1 > ρ2, which one will be the correct relation between F1 and F2?

A. F1 > F2
B. F1 ≥ F2
C. F1 < F2
D. F1 ≤ F2
Answer» B. F1 ≥ F2
Discussion
13.

By what factor will the hydrostatic force on one of the vertical sides of a beaker decrease if the height of the liquid column is halved?

A. 1 ⁄ 2
B. 1 ⁄ 3
C. 1 ⁄ 4
D. 2 ⁄ 3
Answer» D. 2 ⁄ 3
Discussion
14.

A cuboidal beaker is half filled with water. By what percent will the hydrostatic force on one of the vertical sides of the beaker increase if it is completely filled?

A. 100
B. 200
C. 300
D. 400
Answer» D. 400
Discussion