Modules I, J & K Highlights

Question 1

Many valves have two ratings: the steam rating and the water, oil and gas (WOG) ratings which is also called ________________________

Answer 1

cold working pressure (CWP) rating

Question 2

What does the marking 125S on a valve indicate?

Answer 2

Steam rating. They can be displayed with the pressure number followed by the letter S

Question 3

What does the marking 150WSP on a valve indicate?

Answer 3

Steam ratings. They can be displayed with the pressure number followed by the letters WSP- working steam pressure

Question 4

Plug valves ________________ of liquids.

Answer 4

Regulate the flow

Question 5

Which valve has an almost straight line of flow and offers little resistance

Answer 5

Swing check valve

Question 6

Which valve changes direction twice as it passes through the valve?

Answer 6

Lift check valve

Question 7

Which valves start to open at a pre-set pressure?

Answer 7

Relief valves open at a pre-set pressure (cracking pressure)

Question 8

Full flow pressure for the valve may be ________ higher for the valve to be wide open

Answer 8

20%

Question 9

____________________ are devices that measure process variables and provide a signal to a control system for decisions making (logic)

Answer 9

Transducers

Question 10

A ________________________ is a type of multi-phase electric motor that does not usually rotate continuously

Answer 10

Stepping motor

Question 11

When doing a visual inspection of a seat ring, what should you look for?

Answer 11

corrosions, erosion, or wire drawing (deep grooves on a valve seat or flange caused by the scouring action of escaping fluids)

Question 12

How is tubing sized?

Answer 12

by its actual outside diameter NOT the nominal inside diameter as used for pipes

Question 13

What materials is tube available in?

Answer 13

steel, copper, aluminum and plastic

Question 14

The two standard flare angles for fittings are 37˚ and 45˚. What is 37˚ used for?

Answer 14

37˚ is intended for high-pressure service and meets industrial hydraulic standards

Question 15

The two standard flare angles for fittings are 37˚ and 45˚. What is 45˚ used for?

Answer 15

45˚is used on low-pressure automotive or refrigeration application

Question 16

When tightening a flared joint, you first tighten finger-tight, then you use a flare tubing wrench. How much should you turn the nut for tube sizes up to 5/8”?

Answer 16

turn the nut 1/4 turn for up to 5/8 inch

Question 17

When tightening a flared joint, you first tighten finger-tight, then you use a flare tubing wrench. How much should you turn the nut for tube sizes over 5/8”?

Answer 17

turn the nut 1/8 turn for over 5/8 inch

Question 18

How do you install a flareless fitting?

Answer 18

Tighten the nut 1/6 to 1/3 of a turn after finger tightening

Question 19

How do you tighten welded fittings?

Answer 19

Heat the welded area to a dull red and then allow it to cool in the air

Question 20

What would you use when you have to connect a fluid conductor to moving parts?

Answer 20

A hose

Question 21

Some major hose manufacturers establish the working pressure at ____________ of the bursting pressure

Answer 21

One quarter

Question 22

The pressure rating for hoses made to North American standards is given in __________ and hoses made to __________

Answer 22

psi, isometric (ISO)

Question 23

The pressure rating for hoses made outside of North America are rated in ____________

Answer 23

Megapascals

Question 24

A megapascal is equal to about _______ psi

Answer 24

145

Question 25

Hydraulic hose fittings are produced with male fittings with a 37˚ JIC seat angle. What does JIC stand for?

Answer 25

Joint industry conference

Question 26

What is a disadvantage of a pancake blind when compared to a spectacle blind?

Answer 26

the flanges have to be spread in order to remove the blinds. With spectacle blinds, the piping system is designed to accommodate the blind.

Question 27

How do you purge?

Answer 27

You introduce an inert gas such as nitrogen or carbon dioxide into the piping system, vessel or compressor and then purge it with air.

Question 28

Which mediums are used to purge?

Answer 28

The medium chosen must suit the application and equipment. Some common mediums are nitrogen, carbon dioxide, steam, water and air.

Question 29

How is the location of a permanent gas detector chosen?

Answer 29

Based upon the characteristics of the gas. If the gas is heavier than air, the sensor mounts below the equipment, if the gas is lighter than air, the sensor mounts above the equipment.

Question 30

What is one factor that affects the sealing ability of a flat gasket?

Answer 30

The thickness of the gasket

Question 31

Gasket thickness is critical. By changing gasket thickness, you may change ________________________

Answer 31

the internal alignment and clearances

Question 32

Give an example of a common type of rubber/other elastomer

Answer 32

nitrile (Buna-N)

Question 33

Whenever a piece of equipment is disassembled for maintenance, a new ______ should be installed.

Answer 33

gasket

Question 34

What are pipes?

Answer 34

Rigid connectors with thick walls that can be threaded or welded

Question 35

What is the benefit of using cast iron pipe?

Answer 35

corrosion resistance

Question 36

Galvanized coatings should not be used in ________________

Answer 36

hydraulic service

Question 37

In pipe sizing, the _______________ diameter is kept constant

Answer 37

outside

Question 38

For heavier weights, a 1-inch pipe would have a ______________ inside diameter

Answer 38

much smaller

Question 39

Inside diamter is used for sizes up to and including _____________

Answer 39

12 inches

Question 40

Outside diameter is used for pipe sizes _______________

Answer 40

over 12 inches

Question 41

Groove and clamp joints are normally used on pipes that are ______________ in diamter

Answer 41

at least 3 inches

Question 42

Groove and clamp joints are commonly called

Answer 42

Victaulic couplings or gruvlok