# Fluid Dynamics

MCQsQuestion.com has 36 Question/Answers about Topic Fluid Dynamics

## According to equation of continuity, product of area of pipe and speed of fluid along pipe is

- A. 1
- C. Constant
- D. Different
- Correct Answer: Option C

## Force required to slide one layer from another measures the

- A. Viscosity
- B. Friction
- C. Gravity
- D. Surface tension
- Correct Answer: Option A

## At 30 °C, viscosity of benzene is

- A. 0.23
- B. 0.295
- C. 0.61
- D. 0.564
- Correct Answer: Option D

## If fluid is incompressible and is steady, its mass is

- A. Increasing
- B. Decreasing
- C. Same
- D. Conserved
- Correct Answer: Option D

## 30 °C, acetone has viscosity of

- A. 0.19
- B. 0.295
- C. 0.513
- D. 2.564
- Correct Answer: Option B

## Venturi relation is one of applications of

- A. Equation of continuity
- B. Bernoulli's equation
- C. Light equation
- D. Speed equation
- Correct Answer: Option B

## When net force acting on a droplet becomes zero, it falls with

- A. Increasing speed
- B. Decreasing speed
- C. Constant speed
- D. Zero velocity
- Correct Answer: Option C

## According to Bernoulli’s equation, where speed is high, pressure will be

- A. High
- B. Low
- C. Min
- D. Max
- Correct Answer: Option B

## Frictional effect between layers of flowing fluid is known as

- A. Viscosity
- B. Friction
- C. Gravity
- D. Surface tension
- Correct Answer: Option A

## Methanol, at 30 °C, has viscosity of

- A. 0.021
- B. 0.365
- C. 0.51
- D. 3.564
- Correct Answer: Option C

## Streamline flow of water is also known as

- A. Laminar flow
- B. Turbulent flow
- C. Fluid flow
- D. Both a and b
- Correct Answer: Option A

## Fundamental equation that relates pressure to fluid’s speed and height is known as

- A. Equation of continuity
- B. Bernoulli's equation
- C. Light equation
- D. Speed equation
- Correct Answer: Option B

## Plasma’s viscosity at 30 °C is

- A. 1.801
- B. 3
- C. 1.7
- D. 6.29
- Correct Answer: Option C

## With increase of speed in fluid, drag force on an object will be

- A. Increases
- B. Decreases
- C. Remain same
- D. Gets doubled
- Correct Answer: Option A

## Change in potential energy of a body moving from height 10 m to 5 m having mass 3 kg will be

- A. 294
- B. 295
- C. 145
- D. 147
- Correct Answer: Option D