Hydraulics & Pneumatics Systems Flashcards
6 cards from real Amazon Maintenance Technician practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Hydraulics & Pneumatics Systems flashcards as text
What is the primary function of a hydraulic accumulator in a warehouse conveyor system?
Answer: Store pressurized fluid to supplement pump flow during peak demand
A hydraulic accumulator stores pressurized fluid and releases it during peak demand to supplement pump output.
Which type of hydraulic pump is most commonly used in Amazon fulfillment center lift equipment due to its variable displacement capability?
Answer: Piston pump
Variable-displacement piston pumps are preferred in lift equipment because they can adjust flow output to match load requirements.
A pneumatic cylinder is not extending fully. What is the FIRST component to inspect?
Answer: The supply air pressure and filter/regulator/lubricator unit
Low or dirty supply air is the most common cause of incomplete cylinder travel and should be checked first.
What does a pressure relief valve protect against in a hydraulic system?
Answer: Excessive system pressure that could damage components
A pressure relief valve opens when system pressure exceeds a set limit, protecting hoses, fittings, and actuators from overpressure damage.
Which fluid property is most critical when selecting hydraulic oil for an Amazon facility operating in a cold warehouse environment?
Answer: Viscosity index
A high viscosity index means the oil maintains proper viscosity across a wide temperature range, ensuring consistent performance in cold environments.
A pneumatic directional control valve is classified as 4/2. What do these numbers mean?
Answer: 4 ports and 2 positions
In valve nomenclature, the first number indicates the number of ports (flow connections) and the second indicates the number of switching positions.