Basic Hydraulics: DGCA Technical General questions

Question 1

A pre-charge pressure of

Accepted Answer

1500 bar

Answer

500 bar

Answer

1000 bar

Answer

2500 bar

Question 2

With a one way check valve (NRV):

Accepted Answer

Flow stops when input pressure is less than output pressure

Answer

Flow stops when input pressure is greater than output pressure

Answer

Flow stops when the thermal relief valve offloads the hand pump

Answer

Flow starts when input pressure is less than output pressure

Question 3

Pascal's law states that:

Accepted Answer

Applied force acts equally in all directions

Answer

Pressure is inversely proportional to load

Answer

Liquid is compressible

Answer

Oxygen can be used to charge the accumulators

Question 4

With a hydraulic lock there is:

Accepted Answer

No flow, jack is stationary

Answer

Flow, but no jack movement

Answer

No flow but jack continues to move under gravitational effects

Answer

Constant flow

Question 5

The purpose of an accumulator is to:

Accepted Answer

Store fluid under pressure

Answer

Relieve excess pressure

Answer

Store compressed gas for tyre inflation

Answer

Remove air from the system

45 more questions in this chapter, free with an account