block A pvc review

Question 1

If 2 inch NPS pipe has an I.D. of 2.067 inches and an O.D. of 2.375 inches, what is its wall thickness?

Select one:

a.
0.154 inches

b.
0.308 inches

c.
0.077 inches

d.
0.137 inches

Answer 1

The correct answer is: 0.154 inches

Question 2

A pipe has an I.D. of 12 inches and a wall thickness of 3/8 inch. if 1 inch of insulation is to be installed on the pipe with 1 inch clearance to the pipe sleeve what is the minimum I.D. of the sleeve ?

Select one:

a.
17 3/4 inches

b.
12 3/4 inches

c.
16 3/4 inches

d.
14 3/8 inches

Answer 2

1”+ 1” + 3/8” + 12” + 3/8” + 1” + 1” = 16 3/4”

The correct answer is: 16 3/4 inches

Question 3

If a horizontal pipe 90 feet long requires hangers spaced every 10 feet, how many hangers would be needed, excluding those at each end ?

Select one:

a.
10

b.
9

c.
8

d.
7

Answer 3

The correct answer is: 8

Question 4

The absolute pressure against a gauge at sea level which is reading 14.73 PSIG is :

Select one:

a.
29.46 PSIA

b.
30 PSIA

c.
29.46 PSIG

d.
14.73 PSIA

Answer 4

Absolute = Gauge + Atmosperic

The correct answer is: 29.46 PSIA

Question 5

Which of the following metals is lowest on the E.M.F. (electromotive force) series ?

Select one:

a.
Copper

b.
Tin

c.
Magnesium

d.
Gold

Answer 5

The correct answer is: Gold

Question 6

At what temperature is water most dense ?

Select one:

a.
32 °C

b.
4 °C

c.
0 °C

d.
100 °C

Answer 6

B

Question 7

If granite has a specific gravity of 2.7, what is its approximate density ?

Select one:

a.
27 pounds per cubic foot

b.
270 pounds per cubic foot

c.
168 pounds per cubic foot

d.
160 pounds per cubic foot

Answer 7

2.7 x 62.4 lbs/f = 168 pounds per cubic foot

The correct answer is: 168 pounds per cubic foot

Question 8

The metric unit used to indicate mass is :

Select one:

a.
the liter

b.
the meter

c.
the joule

d.
the gram

Answer 8

D

Question 9

The drafting line that indicates alternating positions, moveable parts or future locations of equipment or piping is a :

Select one:

a.
phantom line

b.
cut line

c.
section line

d.
hidden body line

Answer 9

A

Question 10

The outside water, sanitary, and storm drain piping is shown on the:

Select one:

a.
site plan

b.
structural plan

c.
mechanical drawings

d.
elevation drawing

Answer 10

A

Question 11

The valve illustrated is a :Select one:

a.
horizontal flow control valve, screwed

b.
horizontal ball check valve, screwed

c.
horizontal swing check valve, screwed

d.
vertical swing check valve, screwed

Answer 11

C

Question 12

The valve illustrated is a :Select one:

a.
pressure reducing valve

b.
pressure increasing valve

c.
safety valve

d.
ball valve

Feedback

Answer 12

The correct answer is: pressure reducing valve

Question 13

The valves illustrated are allSelect one:

a.
straight globe valves

b.
straight ball valves

c.
flanged globe valves

d.
straight gate valves

Answer 13

The correct answer is: straight globe valves

Question 14

The valves illustrated are all :Select one:

a.
straight gate valves

b.
flanged globe valves

c.
flanged ball valves

d.
flanged gate valves

Answer 14

The correct answer is: straight gate valves

Question 15

The two fittings shown are :Select one:

a.
flanged gate valves

b.
welded reducing couplings

c.
funnel fittings

d.
flanged reducing couplings

Answer 15

The correct answer is: flanged reducing couplings

Question 16

This symbol represents :Select one:

a.
a hidden line

b.
a hot water line

c.
a return hot water line

d.
a cold water line

Answer 16

The correct answer is: a cold water line

Question 17

The name given to a piping drawing submitted after the job is completed, to show the locations of pipes are called :

Select one:

a.
isometric drawings

b.
as-built drawings

c.
installed drawings

d.
site plan drawings

Answer 17

The correct answer is: as-built drawings

Question 18

If a print is drawn at a scale of 1/4 inch/ft what would the actual length of a pipe be if it was drawn 2 7/8 inches long?

Select one:

a.
11 ft 6 inches

b.
8 ft 7 inches

c.
23 ft 8 inches

d.
18 ft 3 inches

Answer 18

The correct answer is: 11 ft 6 inches

Question 19

When accurate scale and a more realistic appearance is needed to represent piping system, which of the following would be used ?

Select one:

a.
Triple-line drawings

b.
Double-line drawings

c.
Phantom drawings

d.
Single-line drawings

Answer 19

The correct answer is: Double-line drawings

Question 20

A 90° fittings drawn isometrically would be represented by an angle of:

Select one:

a.
120 °

b.
90 °

c.
60 °

d.
30 °

Answer 20

A

Question 21

The proper wrench used to tighten a flat-edged fitting is called a:

Select one:

a.
strap wrench

b.
basin wrench

c.
spud wrench

d.
chain wrench

Answer 21

C

Question 22

Besides being a safety device, the foot switch used on a power drive is a remote to control:

Select one:

a.
forward-off switch

b.
on-off switch

c.
reverse-off switch

d.
forward-off-reverse switch

Answer 22

B

Question 23

Shaft bearings on a power vise should be lubricated:

Select one:

a.
only when the bearings dry out

b.
with machine oil

c.
with grease

d.
after each job

Answer 23

C

Question 24

With a power vise, the only safe reamer to use is a:

Select one:

a.
ratcheting reamer

b.
spiral reamer

c.
fluted reamer

d.
file

Answer 24

C

Question 25

The type of die head used on a power threader that doesn’t require reversing in order to disengage the pipe is called :

Select one:

a.
ratchet

b.
drop-head

c.
universal

d.
quick opening

Answer 25

D

Question 26

This tool would be used to center a vertical pipe rising out of the ground, through a sleeve in the slab above it:

Select one:

a.
tape measure

b.
level

c.
transit

d.
plumb bob

Answer 26

D

Question 27

What is applied to the strap of a strap wrench to keep it from slipping on the work-piece ?

Select one:

a.
Powdered resin

b.
Powdered chalk

c.
Water

d.
A light application of cement

Answer 27

A

Question 28

A die marked 5/8 nc would be used for threading :
Select one:

a.
brass pipe

b.
plastic pipe

c.
galvanzied pipe

d.
mild steel rod

Answer 28

D

Question 29

The length of a standard pipe wrench is measured from:

Select one:

a.
the inside of the hook jaw to the end of the handle, with the wrench closed

b.
the inside of the hook jaw to the end of the handle, with the wrench fully open

c.
the face of the heel jaw to the end of the handle

d.
the outside of the hook jaw to the end of the handle

Answer 29

B

Question 30

The largest screw listed below would be a :

Select one:

a.
#8

b.
#12

c.
#6

d.
#10

Answer 30

B

Question 31

Left-hand threads on an acetylene fitting are usually recognizable by:

Select one:

a.
the initials LH stamped on the nut

b.
coloring the nut red

c.
coloring the nut green

d.
a line cast around the nut

Answer 31

The correct answer is: a line cast around the nut

Question 32

The safety device built into an acetylene cylinder is :

Select one:

a.
an excess-flow valve

b.
a double sealed valve

c.
a fusible plug

d.
a relief plug

Answer 32

The correct answer is: a fusible plug

Question 33

The substance which must always be present in an acetylene cylinder is :

Select one:

a.
acetone

b.
acid

c.
aldehyde

d.
acetate

Answer 33

A

Question 34

When using a hacksaw, for best performance, how many teeth should be in contact with the work-piece ?

Select one:

a.
Three

b.
Six

c.
One

d.
Ten

Answer 34

The correct answer is: Three

Question 35

If the firing pin was damaged on a powder actuated tool, it should be:
Select one:

a.
repaired by a person with a current operator’s certificate

b.
replaced with a new tool

c.
repaired by a service person approved by the manufacturer

d.
it may be repaired by any service person, but must be test fired

Answer 35

The correct answer is: repaired by a service person approved by the manufacturer

Question 36

WHMIS means:

Select one:

a.
Workplace Hazardous Material Information System

b.
Warehouse Hazardous Material Information System

c.
Womens Hazardous Material Information System

d.
Workers Hazardous Material Information System

Answer 36

A

Question 37

In reference to the WHMIS system,the abbreviation MSDS stands for:

Select one:

a.
Material Safety Data Sheet

b.
Material Safety Database System

c.
Metal Standard Decimal Sheet

d.
Mechanical System Data Sheet

Answer 37

The correct answer is: Material Safety Data Sheet

Question 38

The minimum number of planks and their dimensions for a working platform shall be :

Select one:

a.
(2) - 2 x 4’s on edge 20 inches apart with 1/4 inch plywood nailed to them

b.
2 planks 1 1/2 inch x 10 inch nominal

c.
1 planks 1 1/2 inch x 10 inch nominal

d.
2 planks 2 inch x 10 inch nominal

Answer 38

The correct answer is: 2 planks 2 inch x 10 inch nominal

Question 39

Guard rails, when required, shall be placed at :

Select one:

a.
48 inches above the working platform

b.
42 inches above the working platform

c.
36 inches above the working platform

d.
60 inches above the working platform

Answer 39

The correct answer is: 42 inches above the working platform

Question 40

The maximum height at which a worker can work above ground before requiring guard rails is:

Select one:

a.
15 feet

b.
6 feet

c.
10 feet

d.
5 feet

Answer 40

C

Question 41

If a ladder is placed against a 20 foot high building which has a two foot overhang how far will the base of the ladder be from the building?

Select one:

a.
6 feet

b.
5 feet

c.
4 feet

d.
7 feet

Answer 41

The correct answer is: 7 feet

Question 42

Center-punching of concrete is done to :

Select one:

a.
mark the position of a powder-actuated shot

b.
assess the power level needed of a powder-actuated tool

c.
mark a hole for reference measurements

d.
assess the curing progress of concrete

Answer 42

The correct answer is: assess the power level needed of a powder-actuated tool

Question 43

In assessing the work-piece, you find that it can’t be indented with a powder-actuated nail. What should your reaction be ?

Select one:

a.
Load and fire using the lightest charge

b.
Load and fire using the mid-range charge

c.
Load and fire using the heaviest charge

d.
Do not fire the tool, the work piece is too hard

Answer 43

The correct answer is: Do not fire the tool, the work piece is too hard

Question 44

A/an _________ is best suited to anchor a piece of machinery to a concrete floor.

Select one:

a.
expansion shield and bolt

b.
toggle bolt

c.
plastic plug

d.
U-bolt

Feedback

Answer 44

The correct answer is: expansion shield and bolt

Question 45

A safety line should be attached to what part of the safety harness?

Select one:

a.
The bottom

b.
The side

c.
The front

d.
The back

Answer 45

D

Question 46

Which of the following knots can be used to join two ropes of different diameters ?

Select one:

a.
A clove hitch

b.
A reef knot

c.
A catspaw

d.
A sheet bend

Answer 46

The correct answer is: A sheet bend

Question 47

A bowline on the bight is tied:

Select one:

a.
with a clove hitch

b.
in the middle of a rope

c.
at the end of a rope

d.
with an underhand loop

Answer 47

The correct answer is: in the middle of a rope

Question 48

To stop the hoisting of a load the signalman:

Select one:

a.
extends one hand out from the waist area, palm down and moves it forward and backward

b.
waves both hands frantically

c.
waves one hand back and forth over his/her head

d.
extends both hands out from the waist area, palms down, in a rapid motion

Answer 48

The correct answer is: extends one hand out from the waist area, palm down and moves it forward and backward

Question 49

To prevent a load from swinging, a ____________is used.

Select one:

a.
pipe strap

b.
double cable

c.
tag line

d.
double sling

Answer 49

The correct answer is: tag line

Question 50

If the hook on a come-along is cracked, it should be

Select one:

a.
the hook must be discarded

b.
brazed then heat treated

c.
left in operation, provided the crack isn’t too large

d.
welded then heat treated

Answer 50

The correct answer is: the hook must be discarded

Question 51

When lifting a pipe with a crane, how should the tag line be attached to the pipe?

Select one:

a.
With a half hitch

b.
With a sheet bend

c.
With a clove hitch

d.
With a bowline

Answer 51

C

Question 52

Which drawings should be referenced when determining equipment location?

Select one:

a.
From gridlines on the mechanical drawings

b.
From gridlines on the archictectural drawings

c.
From benchmarks on the structural drawings

d.
From the reference notes on the as builts

Answer 52

The correct answer is: From gridlines on the mechanical drawings

Question 53

What should-be done prior to an inspection?

Select one:

a.
The piping system should be concealed

b.
The piping system should be flushed

c.
The piping system should be labelled

d.
The piping system should be tested

Answer 53

The correct answer is: The piping system should be tested

Question 54

When can water-filled plastic pipe be relied on for a fire-stop?

Select one:

a.
If the pressure is under 50 PSIG

b.
Never

c.
Only if multi-family residential

d.
If the pressure is over 50 PSIG

Answer 54

The correct answer is: Never

Question 55

What would be used to prevent a clevis hanger from crushing the insulation on a chilled water line?

Select one:

a.
Hanger guard

b.
Insulation shield

c.
Hanger shield

d.
Insulation guard

Answer 55

The correct answer is: Insulation shield

Question 56

What would be the minimum size for a sleeve through a concrete slab if it is to allow for a 3” inside diameter pipe with a 5/16” wall thickness, 1” insulation and a 1/2” annular spacing?

Select one:

a.
6 1/4 inches

b.
5 3/4 inches

c.
4 13/16 inches

d.
6 5/8 inches

Answer 56

The correct answer is: 6 5/8 inches

Question 57

What type of hanger is used to support multiple pipe lines?

Select one:

a.
Clevis

b.
Riser

c.
Ring

d.
Trapeze

Answer 57

The correct answer is: Trapeze

Question 58

What is the maximum support spacing for a 6 inch soil-or-waste stack ?

Select one:

a.
3.75 m

b.
3 m

c.
7.5 m

d.
2.5 m

Answer 58

C

Question 59

Which code covers the requirements for fire stopping within a building?

Select one:

a.
National Building Code

b.
National Plumbing Code

c.
National Fire Protection Code

d.
National Mechanical Code

Feedback

Answer 59

The correct answer is: National Building Code

Question 60

What is maximum hanger spacing for a horizontal 1/2 inch copper water line?

Select one:

a.
8 feet

b.
3 feet 9 inches.

c.
2 feet 6 inches

d.
6 feet

Answer 60

2.3.4.5

The correct answer is: 8 feet

Question 61

What is the maximum spacing supporting a 2 inch vertical copper water line?

Select one:

a.
3 m

b.
3.75 m

c.
2.5 m

d.
7.5 m

Answer 61

2.3.4.4

The correct answer is: 7.5 m

Question 62

Which of the following would have a 2-hour fire· rating?

Select one:

a.
Silicon caulking

b.
Asbestos insulation

c.
Manufactured fire collar

d.
25 mm air gap

Answer 62

Fire stop donut

The correct answer is: Manufactured fire collar

Question 63

How many hangers would be required for the following installation which already has supports on each end?

5” Galvanized Water Line (plan view)Select one:

a.
6

b.
12

c.
10

d.
8

Question 64

What are the National Plumbing Code requirements involving floors and walls in shower areas?

Select one:

a.
All shower receptors shall be made of plastic when installed within single family dwellings.

b.
The shower receptor must be constructed so that water cannot leak through walls or floors.

c.
The walls and floors within 2.5 m of the shower head must be lined with plastic

d.
The shower receptor must have an impervious material·up to 2 m above finished floor.

Answer 64

2.2.2.3 (1)

The correct answer is: The shower receptor must be constructed so that water cannot leak through walls or floors.

Question 65

What type of bolts are used to connect a water closet to its flange?

Select one:

a.
Cadmium plated

b.
Brass

c.
Galvanized

d.
Brass plated

Answer 65

2.2.10.2 (1)(a)

The correct answer is: Brass

Question 66

What type of hangers are permitted to be used on a 4-inch copper water line?

Select one:

a.
Epoxy coated steel

b.
1/2 inch copper perforated strapping (all-around)

c.
Cadmium plated steel

d.
Galvanized steel

Feedback

Answer 66

The correct answer is: Epoxy coated steel

Question 67

If the water service is installed in the same trench as the sewer, it should be installed:

Select one:

a.
beside the sewer

b.
below the sewer

c.
above and to one side of the sewer

d.
above the sewer

Answer 67

The correct answer is: above and to one side of the sewer

Question 68

Under similar thermal conditions, the expansion/contraction of copper pipe:

Select one:

a.
is less than that of steel pipe

b.
is the same as that of steel pipe

c.
is more than that of steel pipe

d.
expands more than steel but contracts less

Answer 68

2.3.3.9 P - A-13

The correct answer is: is more than that of steel pipe

Question 69

What type of piping is commonly used for the drain lines from a hospital laboratory?

Select one:

a.
Copper

b.
Pyrex

c.
Galvanized steel

d.
Stainless steel

Answer 69

The correct answer is: Pyrex

Question 70

Which of the following hangers would be best suited for use on a 6 inch galvanized~cold water line?
Select one:

a.
3/4 inch perforated strap iron

b.
8 inch clevis hanger with insulation shield

c.
6 inch ring hanger

d.
6 inch roller hanger with insulation saddle

Answer 70

The correct answer is: 8 inch clevis hanger with insulation shield

Question 71

What type of pipe support would be used on a 4 inch steel riser passing through 6 stories of a building?

Select one:

a.
Roller hangers

b.
Clevis hangers

c.
Riser clamps

d.
Reznor hooks

Answer 71

The correct answer is: Riser clamps

Question 72

A good flame for oxy-acetylene brazing would be:

Select one:

a.
Oxidizing Flame

b.
Neutral Flame

c.
Carbonizing Flame

d.
Feathered Flame

Answer 72

The correct answer is: Neutral Flame

Question 73

A fabricated piece of 10-inch pipe 45 meters long weighs 40 lbs. per lineal foot.. What is the total weight of the load?

Select one:

a.
2900 lbs.

b.
1800 lbs.

c.
3600 lbs.

d.
5900 lbs.

Answer 73

The correct answer is: 5900 lbs.

Question 74

What is done with shackles and pins when a job is complete?

Select one:

a.
The pins are removed from the shackles and are kept in an accessible rigging box.

b.
The pins are placed in the shackles and stored in a clean dry environment.

c.
Worn pins are replaced with bolts and kept in an accessible rigging box·

d.
Worn pins are replaced with bolts and they are stored together in a clean dry environment.

Answer 74

The correct answer is: The pins are placed in the shackles and stored in a clean dry environment.

Question 75

The scale usually appears in what part of the drawing ?

Select one:

a.
The key plan .

b.
Specifications

c.
Notes

d.
The title block

Answer 75

The correct answer is: The title block

Question 76

What type of drawing does this symbol refer to?Select one:

a.
Detail

b.
Section

c.
Oblique

d.
Elevation

Answer 76

The correct answer is: Detail

Question 77

What is the meaning of this symbol?Select one:

a.
Section drawing 13 appears on the same sheet

b.
A detail drawing appears on page 13

c.
A section drawing appears on page 13

d.
Detail drawing 13 appears on the same sheet

Answer 77

The correct answer is: Detail drawing 13 appears on the same sheet

Question 78

What type of drawing does this symbol refer to?Select one:

a.
Elevation

b.
Detail

c.
Oblique

d.
Section

Answer 78

The correct answer is: Elevation

Question 79

What type of drawing does this symbol refer to?Select one:

a.
Detail

b.
Elevation

c.
Oblique

d.
Section

Answer 79

The correct answer is: Section

Question 80

When using Oxy-Acetylene all the oxygen connections will have?

Select one:

a.
Right Handed Threads/Red Hose

b.
Left Handed Threads/Green Hose

c.
Right Handed Threads/Green hose

d.
Left Handed Threads/Red Hose
Feedback

Answer 80

The correct answer is: Right Handed Threads/Green hose

Question 81

What is the recommended sling angle when preparing or hosting a lift?

Select one:

a.
60 degrees

b.
20 degrees

c.
10 degrees

d.
90 degrees

Answer 81

A

Question 82

Welding lenses are available in three basic colors?

Select one:

a.
Amber, Green, Cobalt Blue

b.
Black, Green, Red

c.
Cobalt Blue, Black, Green

d.
Black, Green, Orange

Answer 82

The correct answer is: Amber, Green, Cobalt Blue

Question 83

What does the abbreviation GTAW mean in regards to different types of welding?

Select one:

a.
Gas Tungsen Arc Welding

b.
Gas Tubing Arc Welding

c.
Gas Tight Arc Welding

d.
General Tig Aluminum Welding

Feedback

Answer 83

The correct answer is: Gas Tungsen Arc Welding

Question 84

What procedure should be done prior to working on electrical equipment?

Select one:

a.
Wear Insulated Gloves

b.
Turn Off Breaker

c.
Lock-Out Equipment

d.
Install a Ground Fault Interrupter

Answer 84

The correct answer is: Lock-Out Equipment

Question 85

How do you minimize oxidization when you’re welding?

Select one:

a.
Increase the Amperage

b.
Reduce the Amperage

c.
Clean the pipe with an wire brush

d.
Purge with Argon

Answer 85

The correct answer is: Purge with Argon

Question 86

What must be done before attaching the regulator to the oxy-acetylene cylinders?

Select one:

a.
Crack cylinder valve to remove dust/dirt

b.
Release the regulator adjusting screw by turning clockwise

c.
Release the regulator adjusting screw by turning counter clockwise

d.
Nothing needs to be done before attaching the regulator

Answer 86

The correct answer is: Crack cylinder valve to remove dust/dirt

Question 87

If you have a length of ABS pipe 30m long at a temperature of 20 Celsius, what would be the approximate change in length if the temperature was increased in the pipe to 80 degrees Celsius?

Select one:

a.
165mm

b.
55mm

c.
140mm

d.
70mm

Answer 87

A 2.3.3.9

The correct answer is: 165mm

Question 88

Where a drain is provided in an elevator pit, the drain pipe that’s connected to the sump shall be provided with a ___________?

Select one:

a.
Double Check Valve

b.
Back Water Valve

c.
Float Valve

d.
Expansion Joint

Answer 88

The correct answer is: Back Water Valve

Question 89

To protect a welding fitter from sparks, the fitters shield should have two glass covered lenses, one positioned in the front and one behind. What colour are these lenses?

Select one:

a.
Green

b.
Blue

c.
Black

d.
Clear

Answer 89

The correct answer is: Clear

Question 90

When digging a trench how far away for the trench should the spoil pile be (pile of dirt)?

Select one:

a.
1.5m

b.
.6m

c.
2m

d.
2.5m

Answer 90

The correct answer is: .6m

Question 91

On a commercial job site who is responsible for a lock-out procedure?

Select one:

a.
Installer

b.
Field Safety Representative

c.
Foreman

d.
Safety Officer

Answer 91

The correct answer is: Installer