Amazon Maintenance Technician Hydraulics & Pneumatics Systems

Question 1

What is the primary function of a hydraulic accumulator in a warehouse conveyor system?

Accepted Answer

Store pressurized fluid to supplement pump flow during peak demand

Answer

A hydraulic accumulator stores pressurized fluid and releases it during peak demand to supplement pump output.

Question 2

Which type of hydraulic pump is most commonly used in Amazon fulfillment center lift equipment due to its variable displacement capability?

Accepted Answer

Piston pump

Answer

Variable-displacement piston pumps are preferred in lift equipment because they can adjust flow output to match load requirements.

Question 3

A pneumatic cylinder is not extending fully. What is the FIRST component to inspect?

Accepted Answer

The supply air pressure and filter/regulator/lubricator unit

Answer

Low or dirty supply air is the most common cause of incomplete cylinder travel and should be checked first.

Question 4

What does a pressure relief valve protect against in a hydraulic system?

Accepted Answer

Excessive system pressure that could damage components

Answer

A pressure relief valve opens when system pressure exceeds a set limit, protecting hoses, fittings, and actuators from overpressure damage.

Question 5

Which fluid property is most critical when selecting hydraulic oil for an Amazon facility operating in a cold warehouse environment?

Accepted Answer

Viscosity index

Answer

A high viscosity index means the oil maintains proper viscosity across a wide temperature range, ensuring consistent performance in cold environments.

Amazon Practice Test

Amazon Practice Test

Amazon Maintenance Technician Hydraulics & Pneumatics Systems