Hydraulics And Fluid Mechanics MCQ Questions & Answers

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-5 section-6

A piece of wood having weight 5 kg floats in water with 60% of its volume under the liquid. The specific gravity of wood is

A) 0.83 B) 0.6 C) 0.4 D) 0.3

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

An impulse turbine is used for

A) Low head of water B) High head of water C) Medium head of water D) High discharge

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

The power developed by a turbine is (where H = Head of water under which the turbine is working)

A) Directly proportional to $${{\text{H}}^{\frac{1}{2}}}$$ B) Inversely proportional to $${{\text{H}}^{\frac{1}{2}}}$$ C) Directly proportional to $${{\text{H}}^{\frac{3}{2}}}$$ D) Inversely proportional to $${{\text{H}}^{\frac{3}{2}}}$$

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

The flow ratio in case of Francis turbine varies from

A) 0.15 to 0.3 B) 0.4 to 0.5 C) 0.6 to 0.9 D) 1 to 1.5

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

The speed ratio in case of Francis turbine varies from

A) 0.15 to 0.3 B) 0.4 to 0.5 C) 0.6 to 0.9 D) 1 to 1.5

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

According to fan laws, at constant speed and capacity, the pressure and power vary

A) Directly as the air or gas density B) Inversely as square root of density C) Inversely as density D) As square of density

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

The height of a water column equivalent to a pressure of 0.15 MPa is

A) 15.3 m B) 25.3 m C) 35.3 m D) 45.3 m

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

In an immersed body, centre of pressure is

A) At the centre of gravity B) Above the centre of gravity C) Below be centre of gravity D) Could be above or below e.g. depending on density of body and liquid

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

The undershot water wheels are those in which

A) The wheel runs entirely by the weight of water B) The wheel runs entirely by the impulse of water C) The wheel runs partly by the weight of water and partly by the impulse of water D) None of the above

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

Multistage centrifugal pumps are used to obtain

A) High discharge B) High head C) Pumping of viscous fluids D) High head and high discharge

Discuss

Answer & Solution

Answer: Option B

Solution:

Multistage centrifugal pumps are designed and used to obtain high head. These pumps are specifically engineered to provide high pressure or head, making them suitable for applications where the fluid needs to be pumped to a significant height or over long distances against high resistance or gravity.

Option A, "High discharge," is not the primary purpose of multistage centrifugal pumps. These pumps focus on generating high pressure (head) rather than delivering a high volume of fluid (discharge).
Option C, "Pumping of viscous fluids," is not a specific characteristic of multistage centrifugal pumps. The viscosity of the fluid being pumped can affect pump selection, but it's not the primary function of multistage pumps.
Option D, "High head and high discharge," is partially correct as multistage centrifugal pumps do provide high head, but they may not necessarily deliver a high discharge volume.

Therefore, the correct answer is Option B: High head. This is the primary purpose for which multistage centrifugal pumps are used.

Hydraulics And Fluid Mechanics MCQ Questions &amp; Answers | Mechanical Engineering

Hydraulics And Fluid Mechanics MCQ Questions & Answers | Mechanical Engineering