WorksheetsPipe and Threading Knowledge Quiz
Total questions: 27
Worksheet time: 16mins
Cutting steel pipe to length with a (a) leaves a large burr inside that must be removed before installation.
Setting up a pipe threading machine requires __________ sets of dies inserted.
1
2
3
4
Steel pipe and fittings are commonly connected by __________.
tap and die machining
using epoxy cement
threaded joints
forced insertion
There should be enough thread to have how many turns by hand before tightening when using a thread cutting machine?
1-3
2-5
3-6
6-8
What is the first step of the set-up process when using a thread cutting machine to cut steel pipe?
Inspect and insert the dies
Insert and lock the pipe
Deburr the pipe
Apply thread cutting oil
What type of pipes should be threaded using tapered thread dies?
A mechanical joint
A water pipe
A handrail pipe
A wire conduit
With a thread cutting machine it is necessary to apply __________ during the cut.
lithium grease
heat
Oil
compressed air
What is the color of thread seal tape used on gas lines?
white
pink
green
Yellow
(a) is used to clean up irregular or damaged pipe threads.
(a) the ends of a pipe before assembling a section.
A pipe joint should be given a generous coating of __________ before assembly.
lithium grease
pipe-joint compound
paint
thread cutting oil
An alternate to pipe dope is __________.
lithium grease
thread cutting oil
paint
pipe tape
In both threaded and flange connections, which type of mechanical expansion joints are used?
dissimilar type metal joints
bellows type joints
expanding plastic type joints
solid copper tube joints
When there is __________ in a hydraulic system, it is caused by a mechanical misalignment.
high system pressure
incorrect acceleration
Vibration
high fluid temperature
The function of fiberglass insulation in a piping system is __________.
to confine heat
chemical resistance
to reduce vibration
to reduce condensation
One problem during the hot tapping process is that __________ could get into the downstream machines.
Shavings
air
heat
cutting fluid
What type of piping fatigue failures are a major cause of downtime and fires in industrial plants?
blockages
leaks
Vibration
defective piping
Thermoplastic pipe __________.
softens when heated
hardens when heated
remain soft under all conditions
can withstand high temperatures without deforming
Which type of plastic piping contains chemicals that aid in UV ray protection?
Polyethylene (PE)
Polypropylene (PP)
Polyvinyl Chloride (PVC)
__________ pipes would typically be used for an application that uses corrosive fluid at temperatures up to 300 °F.
In plastic pipe sizes, the higher the schedule number, the __________.
more flexible the pipe
lighter the pipe
thinner the wall thickness
greater the wall thickness
Plastic pipe comes in schedule numbers, __________.
1,2,3,4
A,B,C
40, 80, 120
1000, 2000, 3000
A common tool used to cut plastic pipe is the __________.
Hacksaw
arc welder
utility knife
machine lathe
Schedule __________ plastic pipe should not be threaded.
40
80
120
180
Threading is not recommended for plastic pipes over __________ inches in diameter.
2
3
4
5
It is best to thread a plastic male thread into a metal female thread when connecting plastic pipe to metal piping components to prevent the plastic threaded fitting from __________ as it is tightened.
seizing
Cracking
sticking
melting
When using solvent welding on PVC pipes, it requires __________.
a heat gun
an arc welder
an etching of the mating surfaces
no special tools
