CPO Hydraulic Systems & Pump Mechanics Flashcards
6 cards from real CPO practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CPO Hydraulic Systems & Pump Mechanics flashcards as text
What is the primary function of hydraulic fluid in a concrete pump system?
Answer: To transmit power and force through the system
Hydraulic fluid transmits power by transferring force through pressurized fluid within the hydraulic circuit.
What unit is typically used to measure hydraulic system pressure in US concrete pump equipment?
Answer: PSI (pounds per square inch)
PSI (pounds per square inch) is the standard US unit for measuring hydraulic pressure in concrete pump systems.
What happens when hydraulic fluid becomes contaminated in a concrete pump system?
Answer: System components wear prematurely and can fail
Contaminated hydraulic fluid causes accelerated wear on seals, valves, and cylinders, leading to premature component failure.
Which component in a hydraulic circuit controls the direction of fluid flow to actuators?
Answer: Directional control valve
Directional control valves route hydraulic fluid to different actuators, determining the direction of movement throughout the system.
What is the purpose of a hydraulic accumulator on a concrete pump?
Answer: To store pressurized hydraulic fluid for surge dampening or emergency use
A hydraulic accumulator stores pressurized fluid that can be released to maintain pressure, dampen surges, or provide emergency power.
What should an operator check first when hydraulic system pressure drops unexpectedly during pumping?
Answer: Fluid level, external leaks, and relief valve settings
Unexpected pressure drops typically indicate low fluid level, a circuit leak, or an improperly set relief valve that requires immediate investigation.