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-8 section-7

In a short cylindrical external mouthpiece, the vena contracta occurs at a distance __________ the diameter of the orifice from the outlet of orifice.

A) Equal to B) One-fourth C) One-third D) One-half

Discuss

Answer & Solution

Answer: Option B

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

The total pressure on the top of a closed cylindrical vessel of radius (r) completely filled up with liquid of specific weight (w) and rotating at ($$\omega $$) rad/s about its vertical axis, is

A) $$\frac{{\pi {\text{w}}{\omega ^2}{{\text{r}}^2}}}{{4{\text{g}}}}$$ B) $$\frac{{\pi {\text{w}}{\omega ^2}{{\text{r}}^3}}}{{4{\text{g}}}}$$ C) $$\frac{{\pi {\text{w}}{\omega ^2}{{\text{r}}^4}}}{{4{\text{g}}}}$$ D) $$\frac{{\pi {\text{w}}{\omega ^2}{{\text{r}}^2}}}{{2{\text{g}}}}$$

Discuss

Answer & Solution

Answer: Option A

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

Which of the following instrument can be used for measuring speed of a submarine moving in deep sea?

A) Venturimeter B) Orifice plate C) Hot wire anemometer D) Pitot tube

Discuss

Answer & Solution

Answer: Option D

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

A pressure of 25 m of head of water is equal to

A) 25 kN/m² B) 245 kN/m² C) 2500 kN/m² D) 2.5 kN/m²

Discuss

Answer & Solution

Answer: Option B

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

In a centrifugal pump casing, the flow of water leaving the

A) Radial B) Axial C) Centrifugal D) Vortex

Discuss

Answer & Solution

Answer: Option D

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

According to fan laws, for the fans having constant wheel diameters, the power demand varies

A) Directly as fan speed B) Square of fan speed C) Cube of fan speed D) Square root of fan speed

Discuss

Answer & Solution

Answer: Option C

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

The number of buckets on the periphery of a Pelton wheel is given by

A) $$\frac{{\text{D}}}{{2{\text{d}}}} + 5$$ B) $$\frac{{\text{D}}}{{2{\text{d}}}} + 10$$ C) $$\frac{{\text{D}}}{{2{\text{d}}}} + 15$$ D) $$\frac{{\text{D}}}{{2{\text{d}}}} + 20$$

Discuss

Answer & Solution

Answer: Option C

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

The pressure at a point in a fluid will not be same in all the directions when the fluid is

A) Moving B) Viscous C) Viscous and static D) Viscous and moving

Discuss

Answer & Solution

Answer: Option D

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

When a body is placed over a liquid, it will sink down if

A) Gravitational force is equal to the up-thrust of the liquid B) Gravitational force is less than the up-thrust of the liquid C) Gravitational force is more than the up-thrust of the liquid D) None of the above

Discuss

Answer & Solution

Answer: Option C

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

The kinematic viscosity of an oil (in stokes) whose specific gravity is 0.95 and viscosity 0.011 poise, is

A) 0.0116 stoke B) 0.116 stoke C) 0.0611 stoke D) 0.611 stoke

Discuss

Answer & Solution

Answer: Option A

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

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

Hydraulics And Fluid Mechanics MCQ Questions & Answers | Mechanical Engineering