Third year review

Question 1

Purpose of a needle valve?

Answer 1

They are design to control the flow of liquids or gas

Question 2

Large single suction fans are generally mounted on?

Answer 2

Double row spherical

Roller bearing

Question 3

A scoop tube is a form of?

Answer 3

Hydraulic clutch

Question 4

90 psi of air is used for?

Answer 4

Air tools

Question 5

Safety relief valves on pressure vessels can only be set, tested and inspected by?

Answer 5

Alberta Boilers Branch

Question 6

What is a perfect vacuum?

Answer 6

-14.7 psig

Question 7

How do you convert PSIG to PSIA

Answer 7

add 14.7

Question 8

Air compressor operating at sea level would require?

Answer 8

Slightly less than 14.7 PSIA at the inlet

Question 9

An accumulator charging for energy storage is?

Answer 9

90% of system pressure

Question 10

Why must you never use galvanized pipe fittings for hydraulics?

Answer 10

Zinc reacts with fluids

Question 11

Radial piston motors are?

Answer 11

Low speed high torque used in severed service

Question 12

Gasket with staples are used to?

Answer 12

Ground the lids

Question 13

Plate heat exchangers should not be used for?

Answer 13

Thick fluids or fluids that have viscosity change

Question 14

How do I adjust the sliding vane clearance?

Answer 14

with a straight edge and a feeler gauge

Question 15

What check valve has a spring?

Answer 15

Bypass check valve

Question 16

What devices are used to maintenance a hydraulic system?

Answer 16

Tachometer
Pressure gauge
Flow meter

Question 17

What are the two different types of hydraulic systems?

Answer 17

Mobile and Stationary

Question 18

Which valve has an internal pilot in the out port and external drain valve

Answer 18

Pressure reducing valve

Question 19

What is the device call to measure the pressure in a fan?

Answer 19

Manometer

Question 20

What is the simplest form of a check valve?

Answer 20

Directional Control Valve

Question 21

Cause of Aeration in a pump?

Answer 21

Inlet fitting are leaking or loose

Question 22

What does a deceleration valve produce?

Answer 22

Speed

Question 23

What are the three kinds of pressures developed by fans?

Answer 23

Static
Velocity
Total Pressure

Question 24

How is velocity measure?

Answer 24

Pilot tube or
Pitot tube      (test purposes they both mean the same)

Question 25

Where is the pressure reducing valve located?

Answer 25

in between the pump and the directional control valve

Question 26

A hydraulic hose flare fitting with a #12 on it, What size hose should it use?

Answer 26

3/4 or 16/12=0.75

Question 27

Which pump uses a swash plate?

Answer 27

The in-line axial piston pump

Question 28

What is the main cause of a pump failure?

Answer 28

Contamination

Question 29

How many watts in a horse power?

Answer 29

746 = 1 horse power

Question 30

What is cavitation?

Answer 30

Is the violent collapse of entrained vapors, gas, bubbles

Question 31

What pressure is normally used for hydrostatic testing?

Answer 31

1 -1/2 times the working pressure

Question 32

What is the rotation of a factory rebuilt balanced van pump?

Answer 32

Right hand

Question 33

What is the main cause of oxidation in hydraulic systems?

Answer 33

Heat

Question 34

Cavitation can be the result of:

Answer 34

Running pump at too high a speed

Question 35

An example of dynamic pump would be

Answer 35

Impeller