CPT CPT Fluid Systems & Hydraulics

Question 1

What is the primary function of a check valve in a hydraulic system?

Accepted Answer

Allow flow in one direction only

Answer

Allow bidirectional flow

Answer

Regulate system pressure

Answer

Filter contaminants

Question 2

Which unit is used to express hydraulic pressure in industrial process systems in the US?

Accepted Answer

PSI

Answer

GPM

Answer

RPM

Answer

CFM

Question 3

What does cavitation in a hydraulic pump indicate?

Accepted Answer

Insufficient fluid supply or trapped air causing vapor bubbles

Answer

Excessive back pressure

Answer

High fluid viscosity

Answer

Filter bypass condition

Question 4

A relief valve in a hydraulic circuit is set to open at 2,000 PSI. What happens when system pressure reaches 2,500 PSI?

Accepted Answer

The relief valve opens and diverts fluid back to the reservoir

Answer

The pump shuts down automatically

Answer

The actuator extends at maximum speed

Answer

A pressure switch triggers an alarm only

Question 5

Which type of hydraulic pump delivers a fixed volume of fluid per revolution regardless of outlet pressure?

Accepted Answer

Fixed displacement pump

Answer

Variable displacement pump

Answer

Centrifugal pump

Answer

Peristaltic pump

Question 6

What is the purpose of a hydraulic accumulator in a process system?

Accepted Answer

To store pressurized fluid for emergency or supplemental flow

Answer

To filter hydraulic oil

Answer

To cool hydraulic fluid

Answer

To measure flow rate