Chp 13 test hydra ans

Technician A says on a correctly operating gas accumulator, pre-charge pressure should be checked during a 500-hour preventative maintenance inspection. Technician B says it is safe to perform repairs on a hydraulic system if the system contains an accumulator that is charged full of oil. Who is correct?

• Technician A

• Technician B

• Both A and B

• Neither A nor B

Technician A says the three basic types of accumulators are electric, differential, and pneumatic. Technician B says the process of charging a bladder gas accumulator should be done slowly to avoid damage to the rubber bladder. Who is correct?

• Technician A

• Technician B

• Both A and B

• Neither A nor B

A ____ hydraulic hybrid uses an engine (without a connection to the drive axle) to drive a hydraulic pump, which drives a hydraulic motor that propels the machine.

• plug-in

• Parallel

• Complete

• Series

All of the following types of accumulators are commonly used in mobile hydraulic systems, EXCEPT:

• diaphragm

• bladder

• weighted

• spring

All of the following are commonly located in an accumulator safety block, EXCEPT:

• A. isolator valve.

• B. relief valve.

• C. pressure gauge.

• D. safety fuse.

All of the following are examples of hydraulic hybrid machines, EXCEPT:

• excavator

• asphalt compactor

• delivery compactor

• scraper

When filling an accumulator with nitrogen, the pressure gauge will ____. A. Fluctuate

• Remain constant
• Drop steadily
• Fluctuate
• Increase linearly

Safety fuses can be ruptured when increases.

• Pressure

• Temperature

• Both A and B
• Neither A nor B

Some manufacturing facilities add an extra (a)   in parallel to an accumulator circuit to add extra capacity.

• cylinder

• gas bottle
• reservoir

• valve

A(n) (a)   sensor is used to measure the piston position inside a small accumulator.

• LVDT

• MLDT

• potentiometer

• temperature