Hydraulic System

Question 0

What is the normal pressure in each hydraulic system?

Answer 0

3000 psi

Question 1

How many separate hydraulic systems are there in the CRJ?

Answer 1

3

Question 2

Low pressure caution occurs at what pressure?

Answer 2

<1800 psi

Question 3

Hydraulic high pressure occurs at what pressure?

Answer 3

3200 psi

Question 4

What is the normal hydraulic system quantity?

Answer 4

45% to 85%

Question 5

Hydraulic high temperature condition occurs at what temperature?

Answer 5

Greater than or equal to 96 Celsius

Question 6

The HYD HI TEMP caution indicates that hydraulic fluid is hot in which part of the system?

Answer 6

The reservoirs

Question 7

How many hydraulic pumps are there?

Answer 7

6 (three full time “a” pumps and three part time “b” pumps)

Question 8

When will the hydraulic b pumps operate?

Answer 8

When switched on or with switches in auto when flaps are moved out of the 0 position

Question 9

When will hydraulic pump 3B operate?

Answer 9

When switched on or when switch is in auto, at least one generator is online and flaps are out of the 0 position or when the ADG deploys

Question 10

What type of hydraulic fluid is used?

Answer 10

Skydrol

Question 11

What color is the hydraulic fluid?

Answer 11

Purple

Question 12

When will pressure relief occur?

Answer 12

Greater than or equal to 3750psi