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WorksheetsSteel Pipe Review Questions
Total questions: 34
Worksheet time: 17mins
Name
Class
Date
1.
Steel pipe used in fire sprinkler systems installed per NFPA 13 must conform to a specific ATSM standard listed in NFPA 13, or________.
a)
be a specially listed pipe for fire sprinkler systems
b)
be approved pipe from the owner
c)
be coated with an approved corrosion resistant coating
d)
be certified by the pipe manufacturer
2.
Examples of acceptable ASTM standard numbers for fire sprinkler pipe are ASTM A795, and_____.
a)
ASTM A42
b)
ASTM A53
c)
ASTM A100
d)
ATSM A175
3.
Per NFPA-13, other types of specifically listed fire sprinkler pipe must be installed per its listing, including____.
a)
ASTM A42
b)
ASTM A53
c)
ASTM A100
d)
Installation instructions
4.
It is required by NFPA-13 for the pipe to be marked to identify the type of pipe____.
a)
All along its length
b)
Every 5 feet of pipe length
c)
On branch lines only
d)
on mains longer than 4 feet
5.
The fittings used for fire sprinkler systems installed per NFPA 13 must conform to______.
a)
select ASSE standards
b)
manufacturer’s quality control processes
c)
class, pressure ratings, and ATSM standards listed in NFPA-13
d)
d. red seals of approval
6.
The threads used to join threaded pipe and fittings in sprinkler systems installed per NFPA-13 must conform to ANSI B1.20.1 and are ________ pipe threads.
a)
left-hand
b)
straight
c)
British standard
d)
taper
7.
Steel pipe with a wall thickness less than schedule 40________.
a)
Is never allowed to be threaded for sprinkler systems
b)
Is allowed to be threaded with building owner approval
c)
Is allowed to be threaded provided no corrosive conditions exist on the job
d)
Is allowed to be threaded where investigated and found suitable, and listed for sprinkler system service
8.
Standard weight cast iron fittings are permitted for sizes 2 in. and smaller where pressures do not exceed____PSI.
a)
100
b)
175
c)
200
d)
300
9.
Standard weight malleable iron fittings are permitted for sizes____ and smaller where pressures do not exceed 300 PSI.
a)
2 inch
b)
4 inch
c)
6 inch
d)
8 inch
10.
Screwed unions shall not be used on pipe sizes larger than_____.
a)
1 inch
b)
2 inch
c)
4 inch
d)
6 inch
11.
Pipe, fittings, valves, and devices to be joined with grooved couplings shall contain cut, rolled, or cast grooves that ________.
a)
have been visually inspected
b)
Are dimensionally compatible with the couplings.
c)
Have been dye tested
d)
Have been inspected by a competent person
12.
Grooved couplings, including gaskets used on dry pipe, preaction, and deluge systems, shall be listed for _____.
a)
dry service
b)
extreme vibration
c)
excessive deflection
d)
13D systems only
13.
After cutting a pipe, it is a (n) _______ to remove the burrs and fins from the pipe.
a)
recommended practice
b)
trade secret
c)
NFPA-13 requirement
d)
good idea
14.
When threading pipe, ________ be used.
a)
thread cutting oil must
b)
motor oil could
c)
tapping fluid should
d)
Any oil greater than 20 weight could
15.
Running the threads a few threads past the width of the threading die is _______.
a)
a field thread length
b)
an oversize thread length
c)
an undersized thread length
d)
a factory thread length
16.
A good way to check completed threads for correct length and depth is____.
a)
To use a thread ring gauge
b)
Visual inspection of the threads
c)
Measuring thread length with a tape measure
d)
Counting the number of threads
17.
Apply thread sealant_____.
a)
To male threads only
b)
To both male threads and the inside of all fittings
c)
To male threads and to the inside of all threaded weld-o-lets
d)
To female threads only
18.
Teflon tape works for joining pipe and fittings and making the joints leak tight by______.
a)
allowing pipe and fittings to go together more tightly by lubricating
b)
sealing and clogging the leak paths
c)
bonding the pipe and fitting together
d)
chemically leaching into the pores of the threads
19.
Anaerobic pipe sealant makes pipe joints leak tight by______.
a)
lubricating the threads
b)
reacting to any fluids leaking
c)
filling the voids between the pipe threads
d)
expanding when water contacts the sealant
20.
The goal of assembling threaded pipe and fittings and creating leak-tight joints is_____.
a)
To bury the thread as deep into the fitting as possible
b)
To get the “perfect” threads of pipe and fitting to engage, creating a seal
c)
To get the bottom threads of the fitting to mate with the bottom pipe threads
d)
To have as little exposed thread outside the fitting as possible
21.
To ensure that the pipe to be grooved is the correct diameter for grooving,______.
a)
call the supplier to confirm correct pipe size
b)
measure diameter, then compare measurement with acceptable measurement tolerances from manufacturer
c)
use a ring gauge on the outside of pipe
d)
use the area formula to find the area of the pipe diameter
22.
Before grooving, any internal and external projections from the pipe including any weld seams must be_______.
a)
cleaned with a solvent
b)
pounded flat
c)
ground flush with the pipe surface
d)
dimpled using a hammer and chisel
23.
The distance from the pipe end to the groove, identifies the gasket seating area. This area must be free from indentations, projections (including weld seams), and ________.
a)
Pipe ID paint marks
b)
roll marks
c)
fine scratches
d)
missing paint
24.
The correct groove depth is set by_______.
a)
Counting the number of turns the pipe rotates when grooving
b)
Setting the groove stop with a groove depth gauge
c)
Using the factory settings set on the groover
d)
Adjusting the speed and direction of the groove power drive
25.
When setting up for grooving pipe, the pipe roller stand should be______ of the pipe length away from the groover.
a)
10-20%
b)
10-30%
c)
40-50%
d)
65-75%
26.
The finished groove is checked for proper depth by_______.
a)
visual inspection
b)
using a PI tape
c)
Trying a coupling on the groove
d)
Installing and hydrostatic testing
27.
When finished making the groove, allow the pipe to rotate at least ______ more revolutions before stopping the groover and removing the pipe.
a)
1-2
b)
4-5
c)
6-10
d)
10-20
28.
The correct gasket lubricant for grooved couplings is_______.
a)
Crisco or vegetable oil
b)
Any grease, including chassis grease
c)
Any slippery grease or oil
d)
Lubricant approved by the fitting manufacturer
29.
A major concern with using impact wrenches for installing grooved couplings is______.
a)
Overtightening of the coupling bolts
b)
Vibration of the coupling during assembly
c)
The gasket moving out of position during assembly
d)
Breakage of the pipe during assembly
30.
To avoid gasket pinching of a grooved coupling during assembly, it is important to_____.
a)
Tighten the coupling bolts as tightly as possible
b)
Apply pressure to the wrench when tightening the coupling bolts
c)
Lubricate the coupling bolts before tightening
d)
Tighten the coupling bolts evenly
31.
The finished grooved coupling joint should be inspected to ensure that the coupling keys are in the groove and that the_____.
a)
Coupling bolt pads are metal to metal
b)
Some of the gasket is exposed to allow for expansion
c)
Bolt threads have been lubricated per mil spec
d)
Gasket is pinched slightly
32.
When drilling holes on the pipe for mechanical tees, it is important to________.
a)
locate the installation hole on the centerline of the pipe
b)
locate the hole slightly off the centerline of the pipe
c)
drill the hole with the drill slightly tilted
d)
locate and drill the hole at an 11 degree angle
33.
The installation hole for a mechanical tee must be smooth bore and perfectly round. One of the best ways to make the hole in the pipe is to use a______.
a)
Metal cutting hole saw
b)
Cutting torch
c)
Hand saw
d)
Plasma torch
34.
The cut out or disk made when drilling the installation hole for a mechanical tee_____.
a)
Should be retrieved
b)
Must be retrieved per NFPA-13
c)
Must be retrieved if requested by the AHJ
d)
Is not necessary to be retrieved
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