Тест по основам гидравлики (CES v5.0)

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Right answers:
1

By reducing the flow, the torque will:

Your answer is correct:

Be the same.
2

Counterbalance valve is used:

Your answer is correct:

To support a load and prevent “creeping”.
3

Energy not used to move the load in a hydraulic system turns into what?

Correct answer:

Heat.

Your Answer:

Pressure.
4

How much pressure will a force of 2 000 N create in a cylinder with a piston area of 0,0025 m2?

Your answer is correct:

800 kPa.
5

Internal leaks create:

Correct answer:

Heat.

Your Answer:

Higher pressure in the system.
6

Is hydraulic oil compressible?

Correct answer:

Approx. 1/2 % pr. 7 MPa.

Your Answer:

No.
7

Movement of the actuator depends on:

Your answer is correct:

Flow.
8

Pascal’s law says:

Correct answer:

Force = pressure * area.

Your Answer:

Force = pressure / area.
9

Rate of flow determines:

Correct answer:

Speed.

Your Answer:

Torque.
10

What creates pressure in a hydraulic system?

Your answer is correct:

The resistance to flow.
11

What is the most common reason for failures in hydraulic systems?

Your answer is correct:

Contamination of the oil.
12

What type of gas should be used to charge an accumulator?

Your answer is correct:

Nitrogen.
13

When do we use a pilot operated check valve?

Your answer is correct:

To prevent creeping.
14

Which statement is not true?

Your answer is correct:

Hydraulics cannot be used in hazardous condition.
15

Which statement is true?

Your answer is correct:

Hydraulic components have a high power to weight ratio.
16

Which type of pump is most common in hydraulic systems?

Your answer is correct:

Positive displacement pump.
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