Pipe Fittings, Valves etc.

Question 1

T OR F - An orifice flange is used for measuring flow in a piping system

Answer 1

True

Question 2

T OR F - Caps are used to close female openings

Answer 2

False

Question 3

T OR F - A union is essentially a pipe coupling

Answer 3

True

Question 4

T OR F - Brass is an alloy of copper and zinc

Answer 4

True

Question 5

T OR F - Used threaded lubricants or pipe dope on male threads only

Answer 5

True

Question 6

Flared joints are well adapted to high pressure service

Answer 6

True

Question 7

Many factors must be considered in selecting the correct Victaulic gasket for a specific service

Answer 7

True

Question 8

One type of gate valve is the rising stem, outside screw and yoke

Answer 8

True

Question 9

Some valves have a 4 part body

Answer 9

False

Question 10

Springs are sometimes used in check valves to seat the disk quickly

Answer 10

True

Question 11

A ball lift check should only be installed in a horizontal line

Answer 11

True

Question 12

A swing check valve ensures a positive shut off

Answer 12

False

Question 13

A pressure relief valve is used to relieve a build up of excessive pressure in a piping system

Answer 13

True

Question 14

The thermal sensing rod of a T & P valve is usually installed on a bottom of a water heater

Answer 14

False

Question 15

Flow control valves are installed in hydronic systems to create gravity circulation

Answer 15

False

Question 16

The most commonly used bonnet for larger sized valves is the bolted bonnet

Answer 16

True

Question 17

When a valve has a rating of 125 lb S, 200 lb W.O.G. It can be used on a 200 lb steam system

Answer 17

False

Question 18

Temperature and pressure are the only considerations which must be considered when installing valves

Answer 18

False

Question 19

Pipe guide allow the pipe to move in an axial direction only

Answer 19

True

Question 20

The sizes of pipe are identified by the measurement called the

Answer 20

Nominal pipe size (NPS)

Question 21

Steel pipe is supplied with the following end finishes:

Answer 21

PESC (Plain End Square Cut)
T&C (Threaded and coupled
TBE (Threaded Both Ends)

Question 22

Flanges are made in sizes as small as

Answer 22

1/2”

Question 23

A ___ coating can be applied to protect steel pipe by sealing the base metal from corrosive moisture

Answer 23

Zinc

Question 24

What is another name for an elbow fitting

Answer 24

90

Question 25

A __ bolt is threaded on both ends

Answer 25

stud

Question 26

The name of all segments of dies used for cutting threads is called?

Answer 26

chasers

Question 27

A ____ bend makes a 180 degree turn in a pipeline

Answer 27

return

Question 28

A __ wound gasket may include a centering ring, an inner ring or both

Answer 28

spiral

Question 29

A ___ is used to connect two pieces of pipe of different sizes in a straight line

Answer 29

coupling

Question 30

The best practice is to replace __ in full sets

Answer 30

chasers

Question 31

What are the three types of welded joints

Answer 31

Flange, socket, butt

Question 32

Pipe used in ___ welding does not require beveling

Answer 32

socket

Question 33

Only schedule ___ PVC pipe may be threaded

Answer 33

80

Question 34

A ___ wrench should be used to tighten PVC and CPVC pipe flange joints

Answer 34

torque

Question 35

The four principal functions of valves are to ___, ___, ___, ___, flow.

Answer 35

start, stop, direct, regulate/throttle

Question 36

What three factors affect a valve's performance?

Answer 36

pressure, flow, operating conditions

Question 37

Valve pressure classification is always given in?

Answer 37

psig

Question 38

Regulating or throttling flow is done with?

Answer 38

globe and angle valves

Question 39

The two basic types of check valves are?

Answer 39

swing and lift

Question 40

Valves should be installed so that:

Answer 40

1. they can be fully opened 2. the stuffing box can be repacked 3. the stem and bonnet can be removed for inspection

Question 41

A factor to consider in the selection of a pipe hanger and support system is

Answer 41

1. the movement of fluid 2. the temperature of the fluid 3. vibration

Question 42

The most common hanger used in piping systems is the

Answer 42

clevis

Question 43

A ___ clamp is used to support vertical pipe at locations where the pipe passes through

Answer 43

riser or friction

Question 44

Pressure ___ are used to reduce incoming pressures

Answer 44

regulators

Question 45

Boilers subject to damage from excessive pressures should be equipped with

Answer 45

safety

Question 46

Gate valves should only be used with ___ valves, either fully open or closed

Answer 46

stop

Question 47

A rotary or ___ turn valve moves from closed to fully open by rotating its stem 90 degrees

Answer 47

one quarter

Question 48

___ valves can be used for throttling and in some cases shutoff valves

Answer 48

butterfly

Question 49

What are the two basic styles of butterfly valves

Answer 49

wafer and lug

Question 50

A ___ bolted gland is a type of

Answer 50

stuffing box

Question 51

The best way to install a valved in a horizontal line is with the stem

Answer 51

up

Question 52

___ valves are used where a frequent change in direction of flow in more than one pipeline is required.

Answer 52

Multiport

Question 53

A ___ gauge is generally used to check the position of gaskets in the joints of a concrete pressure pipeline.

Answer 53

feeler

Question 54

Flanged joints are made up by bolting two ____ together with a gasket between their ____ faces.

Answer 54

flanges, machined

Question 55

A __ valve is used when there is a need for absolute tightness around the valve stem.

Answer 55

diaphragm

Question 56

Swing check valves give __ resistance to flow

Answer 56

minimal

Question 57

Check valves are used to __________ or __________ reversal of flow in piping.

Answer 57

check, prevent