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-6 section-2

Each section contains 100 MCQs on Hydraulics and Fluid Mechanics in ME .
51
Two pipe systems can be said to be equivalent, when the following quantities are same
Discuss
Answer & Solution
Answer: Option A
No explanation is given for this question. Let's Discuss on Board
52
At the center line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be
Discuss
Answer & Solution
Answer: Option C
Solution:
In a pipe flowing under pressure, the velocity gradient represents the change in velocity across the cross-section of the pipe. When the velocity gradient is zero, it means that the velocity is constant at that point, and there is no change in velocity with respect to distance.

This condition occurs at the centerline of the pipe, where the velocity is at its maximum and is constant. Shear stress is the force parallel to the surface that one layer of fluid exerts on an adjacent layer as they slide past each other. When the velocity gradient is zero, it implies that there is no change in velocity, and, consequently, there is no relative motion between fluid layers.

As a result, the shear stress at the centerline of the pipe, where the velocity gradient is zero, will be Option C: Zero. There is no relative motion between fluid layers, so the shear stress is minimum or effectively non-existent at this location.
53
If the ratio's of the corresponding forces acting at corresponding points are equal, then the model and the prototype are said to have.
Discuss
Answer & Solution
Answer: Option C
No explanation is given for this question. Let's Discuss on Board
54
The discharge through a reaction turbine with increase in unit speed
Discuss
Answer & Solution
Answer: Option B
No explanation is given for this question. Let's Discuss on Board
55
The specific speed of a centrifugal pump, delivering 750 liters of water per second against a head of 15 meters at 725 r.p.m., is
Discuss
Answer & Solution
Answer: Option C
No explanation is given for this question. Let's Discuss on Board
56
The specific weight of sea water is __________ that of pure water.
Discuss
Answer & Solution
Answer: Option C
No explanation is given for this question. Let's Discuss on Board
57
When a body is immersed wholly or partially in a liquid, it is lifted up by a force equal to the weight of liquid displaced by the body. This statement is called
Discuss
Answer & Solution
Answer: Option B
No explanation is given for this question. Let's Discuss on Board
58
For a perfect incompressible liquid, flowing in a continuous stream, the total energy of a particle remains the same, while the particle moves from one point to another. This statement is called
Discuss
Answer & Solution
Answer: Option B
No explanation is given for this question. Let's Discuss on Board
59
The force exerted by a moving fluid on an immersed body is directly proportional to the rate of change of momentum due to the presence of the body. This statement is called
Discuss
Answer & Solution
Answer: Option D
No explanation is given for this question. Let's Discuss on Board
60
A moving fluid mass may be brought to a static equilibrium position, by applying an imaginary inertia force of the same magnitude as that of the accelerating force but in the opposite direction. This statement is called
Discuss
Answer & Solution
Answer: Option C
No explanation is given for this question. Let's Discuss on Board