CPO CPO Hydraulic Systems & Pump Mechanics

Question 1

What is the primary function of hydraulic fluid in a concrete pump system?

Accepted Answer

To transmit power and force through the system

Answer

To lubricate the boom joints

Answer

To cool the engine

Answer

To prime the concrete pipeline

Question 2

What unit is typically used to measure hydraulic system pressure in US concrete pump equipment?

Accepted Answer

PSI (pounds per square inch)

Answer

RPM

Answer

GPM

Answer

BTU

Question 3

What happens when hydraulic fluid becomes contaminated in a concrete pump system?

Accepted Answer

System components wear prematurely and can fail

Answer

Pump output increases

Answer

Concrete mix becomes thinner

Answer

The boom extends faster

Question 4

Which component in a hydraulic circuit controls the direction of fluid flow to actuators?

Accepted Answer

Directional control valve

Answer

Hydraulic pump

Answer

Accumulator

Answer

Return filter

Question 5

What is the purpose of a hydraulic accumulator on a concrete pump?

Accepted Answer

To store pressurized hydraulic fluid for surge dampening or emergency use

Answer

To store extra concrete for later use

Answer

To filter hydraulic fluid between cycles

Answer

To measure total fluid consumption

Question 6

What should an operator check first when hydraulic system pressure drops unexpectedly during pumping?

Accepted Answer

Fluid level, external leaks, and relief valve settings

Answer

Concrete slump value

Answer

Boom angle position

Answer

Total pipeline length