Mechanical Aptitude Mechanical Aptitude Hydraulics and Pneumatics 2

Question 1

In a hydraulic system, if the input piston has an area of 2 sq in and the output piston has an area of 10 sq in, what is the mechanical advantage?

Accepted Answer

5

Answer

Mechanical advantage equals output area divided by input area: 10 ÷ 2 = 5.

Question 2

What type of valve controls the rate of fluid flow in a hydraulic circuit?

Accepted Answer

Flow control valve

Answer

A flow control valve regulates the speed of actuators by restricting or allowing fluid flow rate.

Question 3

Which component in a pneumatic system removes moisture from compressed air?

Accepted Answer

Air dryer

Answer

An air dryer (or filter/dryer) removes water vapor from compressed air to prevent corrosion and damage.

Question 4

What happens to fluid pressure when it passes through a restriction (orifice) in a hydraulic line?

Accepted Answer

Pressure decreases

Answer

According to Bernoulli's principle, fluid pressure drops as it passes through a restriction due to increased velocity.

Question 5

A double-acting hydraulic cylinder differs from a single-acting cylinder because it:

Accepted Answer

Can be powered in both extend and retract directions

Answer

A double-acting cylinder uses hydraulic pressure to both extend and retract the rod, while a single-acting cylinder relies on a spring or gravity for one direction.

Mechanical Aptitude Test Practice Test

Mechanical Aptitude Test Practice Test

Mechanical Aptitude Mechanical Aptitude Hydraulics and Pneumatics 2