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

Filter contaminants from hydraulic oil

Answer

Regulate system temperature

Answer

Convert hydraulic pressure to electrical signals

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

Gear pump

Answer

Vane pump

Answer

Screw pump

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

The cylinder rod seal

Answer

The solenoid coil resistance

Answer

The cylinder bore for scoring

Question 4

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

Accepted Answer

Excessive system pressure that could damage components

Answer

Reverse flow

Answer

Air contamination

Answer

Low fluid level

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

Color

Answer

Flash point

Answer

Specific gravity

Question 6

A pneumatic directional control valve is classified as 4/2. What do these numbers mean?

Accepted Answer

4 ports and 2 positions

Answer

4 psi minimum and 2 psi maximum

Answer

4-inch bore and 2-inch stroke

Answer

4 stages and 2 flow rates