Chp 16 test hydra ans

Chp 16 test hydra ans

Assessment

Flashcard

Other

Professional Development

Practice Problem

Hard

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Wayground Content

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11 questions

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1.

FLASHCARD QUESTION

Front

A tandem two-stage system harnesses the benefit of two ____ flow any time the system pressure is low and prevents engine lugging when system pressures are high.

Back

hydraulic pumps’

2.

FLASHCARD QUESTION

Front

Open-center hydraulic systems use a directional control valve that will route oil flow back to the ____ when the valve is in the neutral position.

Back

reservoir

3.

FLASHCARD QUESTION

Front

A good average open-center system pressure could range anywhere from 50 psi (3.4 bar) up to ____.

Back

300 psi (21 bar)

4.

FLASHCARD QUESTION

Front

Who is correct regarding open-center hydraulic systems: Technician A says they do not need a complex signal network to operate, and Technician B says there will be some inefficiency due to high amounts of constant oil flow?

Back

Both A and B.

5.

FLASHCARD QUESTION

Front

Which equation is used to determine hydraulic horsepower? Options: Flow (gpm) × Pressure (psi) ÷ 1714, Torque (ft-lbs) × Speed (rpm) ÷ 5252, Flow (gpm) ÷ Pressure (psi) × 100, Volumetric efficiency × Mechanical efficiency

Back

Flow (gpm) × Pressure (psi) ÷ 1714

6.

FLASHCARD QUESTION

Front

The term ____ describes a traditional excavator hydraulic pump.

Back

open loop

7.

FLASHCARD QUESTION

Front

The term ____ describes a pump that has some type of extra oil assistance, such as return oil from a hydraulic motor.

Back

open loop

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