Aux 2 Unit 2 Quiz 1

Aux 2 Unit 2 Q1

1 / 8

How is the speed of a hydraulic hoist motor varied in a constant pressure system?

B) By adjusting the swash plate angle

D) By changing the type of hydraulic fluid

A) By altering the pressure in the system

C) By using a variable flow control valve

2 / 8

What is the primary purpose of an accumulator in a constant pressure hydraulic system?

A) To increase the temperature of the hydraulic fluid

C) To cool the hydraulic fluid

B) To store pressurized hydraulic fluid for use when demand exceeds pump capacity

D) To decrease system pressure during operation

3 / 8

Why is pressure regulation necessary in a hydraulic system with a fixed displacement pump?

B) To prevent the system from overheating

A) To increase the flow rate continuously

D) To ensure constant torque

C) To maintain consistent pressure and protect the system from excessive pressure

4 / 8

How is the hydraulic pressure typically regulated in a constant pressure system with a fixed displacement pump?

A) By varying the pump speed

B) By using a pressure relief valve to divert excess flow

C) By adjusting the piston diameter in the pump

D) By changing the fluid temperature

5 / 8

How is the direction of the hoist motor controlled in a hydraulic system?

D) By increasing the accumulator capacity

C) By changing the fluid viscosity

B) By using a directional control valve

A) By reversing the pump's rotation

6 / 8

What is an additional benefit of having an accumulator in a hydraulic system?

B) It constantly increases the system pressure

C) It filters the hydraulic fluid

D) It stabilizes temperature fluctuations in the system

A) It decreases the load on the pump by providing supplementary flow during high demand

7 / 8

What method is used to vary the torque output of a hydraulic hoist motor in a constant pressure system?

A) By changing the pump speed

C) By varying the flow rate and pressure supplied to the motor

B) By adjusting the swash plate angle in the motor

D) By modifying the hydraulic fluid composition

8 / 8

Why might varying torque be necessary for operating a crane’s hoist motor?

D) To prevent the motor from stopping completely

C) To reduce the wear on the hydraulic fluid

A) To ensure the motor operates at a fixed speed

B) To enable the motor to lift or lower loads of varying weights efficiently

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