ExamVeda
Login
Home

Hydraulics And Fluid Mechanics MCQ Questions & Answers | Mechanical Engineering

Learn Hydraulics And Fluid Mechanics MCQ questions & answers are available for a Mechanical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Hydraulics And Fluid Mechanics MCQ question is the important chapter for a Mechanical Engineering and GATE students. Page-8 section-5

Each section contains 100 MCQs on Hydraulics and Fluid Mechanics in ME .
71
Falling drops of water become spheres due to the property of
Discuss
Answer & Solution
Answer: Option C
No explanation is given for this question. Let's Discuss on Board
72
The Reynold's number of a ship is __________ to its velocity and length.
Discuss
Answer & Solution
Answer: Option A
No explanation is given for this question. Let's Discuss on Board
73
The velocity corresponding to Reynold number of 2000 is called
Discuss
Answer & Solution
Answer: Option C
No explanation is given for this question. Let's Discuss on Board
74
The pressure of the liquid flowing through the divergent portion of a Venturimeter
Discuss
Answer & Solution
Answer: Option B
Solution:
The Venturimeter works on Bernoulli’s principle, which relates pressure, velocity, and elevation in a flowing fluid.

When fluid enters the converging section, the cross-sectional area decreases, causing velocity to increase and pressure to drop until it reaches the throat — the narrowest point.

In the divergent (diffuser) section after the throat, the cross-sectional area increases. This causes the velocity of the fluid to decrease due to continuity of flow.

According to Bernoulli’s principle, when velocity decreases, the static pressure increases — this is known as pressure recovery.

The increase in pressure is not dependent on the mass of the liquid but on the conversion of kinetic energy back into pressure energy as the fluid decelerates.

Therefore, in the divergent portion of a Venturimeter, the pressure increases.
75
The velocity of the liquid flowing through the divergent portion of a Venturimeter
Discuss
Answer & Solution
Answer: Option C
No explanation is given for this question. Let's Discuss on Board
76
A jet of water discharging from a 40 mm diameter orifice has a diameter of 32 mm at its vena contracta. The coefficient of contraction is
Discuss
Answer & Solution
Answer: Option B
No explanation is given for this question. Let's Discuss on Board
77
Discharge (Q) of a centrifugal pump is given by (where D = Diameter of impeller at inlet, b = Width of impeller at inlet and Vf = Velocity of flow at inlet)
Discuss
Answer & Solution
Answer: Option C
No explanation is given for this question. Let's Discuss on Board
78
In order to avoid tendency of separation at throat in a Venturimeter, the ratio of the diameter at throat to the diameter of pipe should be
Discuss
Answer & Solution
Answer: Option D
No explanation is given for this question. Let's Discuss on Board
79
The imaginary line drawn in the fluid in such a way that the tangent to any point gives the direction of motion at that point, is known as
Discuss
Answer & Solution
Answer: Option B
No explanation is given for this question. Let's Discuss on Board
80
The flow in which conditions do not change with time at any point, is known as
Discuss
Answer & Solution
Answer: Option C
No explanation is given for this question. Let's Discuss on Board