Bennett Mechanical Fluid Mechanics and Hydraulics Questions and Answers

Question 1

A hydraulic press has a small piston with an area of 2 square inches and a large piston with an area of 20 square inches.
If a force of 50 lbs is applied to the small piston, what is the maximum weight the large piston can lift?

Accepted Answer

500 lbs

Answer

5 lbs

Answer

50 lbs

Answer

1000 lbs

Question 2

Water flows steadily through a pipe that narrows from point X to point Y. Which of the following statements is true about the water's velocity?

Accepted Answer

The velocity is greater at point Y than at point X.

Answer

The velocity is greater at point X than at point Y.

Answer

The velocity is the same at both points.

Answer

The velocity decreases to zero at point Y.

Question 3

Three solid, sealed objects of identical size and shape are fully submerged in a tank of water. Object A is made of wood, Object B is made of aluminum, and Object C is made of lead. Which object experiences the greatest buoyant force?

Accepted Answer

They all experience the same buoyant force.

Answer

Object A

Answer

Object B

Answer

Object C

Question 4

The diagram shows a dam holding back a large body of water. At which point is the hydrostatic pressure against the face of the dam the greatest?

Accepted Answer

Point C (near the bottom)

Answer

Point A (near the surface)

Answer

Point B (halfway down)

Answer

The pressure is uniform at all depths.

Question 5

Two ships are sailing at high speed, parallel to each other and in close proximity. Due to Bernoulli's principle, what is the most likely interaction between the ships?

Accepted Answer

They will be pulled toward each other.

Answer

They will be pushed apart.

Answer

Their speed will increase.

Answer

There will be no noticeable effect.

Question 6

For a siphon to successfully transfer water from a higher container to a lower container, which of the following conditions is essential?

Accepted Answer

The outlet of the siphon tube must be below the water level of the source container.

Answer

The highest point of the tube must be below the water level of the source container.

Answer

Both containers must be at the same atmospheric pressure.

Answer

The diameter of the tube's outlet must be larger than its inlet.

A hydraulic press has a small piston with an area of 2 square inches and a large piston with an area of 20 square inches.If a force of 50 lbs is applied to the small piston, what is the maximum weight the large piston can lift?

A hydraulic press has a small piston with an area of 2 square inches and a large piston with an area of 20 square inches.
If a force of 50 lbs is applied to the small piston, what is the maximum weight the large piston can lift?