CT Red seal prep #1

Question 1

How many teeth on the blade of a hacksaw should always be in contact with the material being cut?

a) At least three
b) Only one
c) Between 20 to 30
d) Between 40 to 50

Answer 1

a) At least three

Question 2

Which of the following minimum distances must a high temperature sprinkler be placed from a unit heater?

a) 9 ft.
b) 7 ft.
c) 12 ft.

Answer 2

b) 7 ft.

Question 3

This many feet above the ground, must scaffolding include guardrails?

a) 5ft
b) 3ft
c) 7ft
d) 10ft

Answer 3

d) 10ft

Question 4

Every residential unit must have a shut-off valve on its water supply.

a) water closet
b) washbasin
c) fixture
d) riser

Answer 4

d) riser

Question 5

What considerations must be made while putting a boiler in a mechanical
room?

a) Install it next to the hot water tank if connecting to a gasline.

b) Allow room for access and service.

c) Install it near the common chimney if it is high efficient.

d) Install it on a fire resistant floor surface if it is cast iron.

Answer 5

b) Allow room for access and service.

Question 6

This is not an acceptable way for linking waste pipe made of cast iron?

a) caulked joint
b) mechanical joint
c) compression joint
d) welded joint

Answer 6

d) welded joint

Question 7

When altering pipe diameters in the horizontal supply or return lines of a two-pipe hot water heating system, what should be used?

a) Eccentric reducers, flat on bottom

b) Eccentric reducers, flat on top

c) Concentric reducing bushings

d) Concentric reducers

Answer 7

a) Eccentric reducers, flat on bottom

Question 8

What would you use to attach copper tube to copper tube in a refrigeration system?

a) BAg-5D silver solder without flux.
b) BCuP-5 without flux.
c) BAg-5 silver solder with flux.
d) 95% tin and 5% antimony solder with flux.

Answer 8

c) BAg-5 silver solder with flux.

Question 9

How much minimum cover must be installed and tamped in a trench to protect drainage piping?

a) 300 mm below finished grade.
b) 150 mm below finished grade.
c) 150 mm above pipe.
d) 300 mm above pipe.

Answer 9

c) 150 mm above pipe.

Question 10

When building a single trap for several shower drains, which statement is true?

a) All drains are located in the same room, the trap is a minimum of 4 in. and no
organic matter can be received by the trap.

b) All drains are located in the same room, the trap is a minimum of 4 in. and the
trap has a cleanout.

c) All drains are located in the same room, no organic matter can be received
by the trap and the trap has a cleanout.

d) The trap is a minimum of 4 in., no organic matter can be received by the trap
and the trap has a cleanout.

Answer 10

d) The trap is a minimum of 4 in., no organic matter can be received by the trap
and the trap has a cleanout.

Question 11

How much is 66% of 468?

a) 246
b) 185
c) 286
d) 308.88

Answer 11

d) 308.88

Question 12

What is the most probable cause of a well pump turning on whenever a faucet is used?

a) foot valve not holding
b) defective pressure switch
c) pump impeller is worn out
d) water logged pressure tank

Answer 12

d) water logged pressure tank

Question 13

When installing a typical close-coupled WC, which sort of trap is required?

a) Integral.
b) Drum.
c) Removable.
d) Indirect.

Answer 13

a) Integral.

Question 14

What factors influence the minimum pipe size required for a continuous vent?

a) The size of the largest trap served, length of vent and number of fixture units.

b) The size of the largest trap served and total number of fixture units.

c) The length of the vent, number of fixture units and grade on piping.

d) The size of the largest trap served, length of vent, fixture units and grade on
piping.

Answer 14

a) The size of the largest trap served, length of vent and number of fixture units.

Question 15

Which suggested maintenance method should be performed on a domestic gas-fired storage-type water heater to avoid inadequate heat transmission through conduction from the heat source?

a) Turn down the water heater temperature.

b) Drain and flush the tank occasionally.

c) Open the T and P relief valve occasionally.

d) Insulate the water heater.

Answer 15

b) Drain and flush the tank occasionally.

Question 16

A sleeve is required for a 6” NPS (150 mm) cast iron soil pipe with a 1/4” (6 mm) wall thickness. What is the necessary minimum internal diameter of the
sleeve?

a) 158mm
b) 162mm
c) 160mm
d) 164mm

Answer 16

b) 162mm

Explanation: For a 6” NPS cast iron soil pipe with a 1/4” wall thickness, the necessary minimum internal diameter of the sleeve would be slightly larger than the outer diameter of the pipe, which is 6” or 150mm plus twice the wall thickness (6mm), totaling 162mm.

Question 17

What colour is DWV type?

a) Blue
b) Yellow
c) Green
d) Black

Answer 17

d) Black

Question 18

Which of the following should the prepared pipe end of a CPVC pipe be?

a) Bevel and clean.
b) Deburr and solder.
c) Deburr and bevel.
d) Deburr and clean.

Answer 18

d) Deburr and clean.

Question 19

Which of the following may be used to vent a horizontal branch off of a stack?

a) maximum number of circuit vented fixtures is 6

b) circuit vented branch is at least 3” in size

c) relief vent is also provided

d) number of circuit vented water closets is 3

Answer 19

c) relief vent is also provided

Question 20

If coliforms are identified in a water system, what equipment is required?

a) Multimedia filter.
b) Manganese greensand filter.
c) Reverse osmosis.
d) Chlorinator.

Answer 20

d) Chlorinator.

Question 21

What must be placed in a hydronic system to prevent air locks?

a) Air scoop on the return water main.

b) Manual air vents on condensate returns.

c) Auto air vents at all system high points.

d) Vacuum relief vents at difficult areas to access.

Answer 21

c) Auto air vents at all system high points.

Question 22

Which boiler control mechanism is used to alter the temperature of the boiler’s water?

a) Aquastat.
b) Gas unitrol.
c) Gas valve.
d) Pressure-trol.

Answer 22

a) Aquastat.

Question 23

What forms is soft copper tubing available?

a) small diameters
b) large diameters
c) coils
d) straight lengths

Answer 23

c) coils

Question 24

A water service enters a structure at a geodetic elevation of 724.5 m with a pressure of 490 kPa. What is the water pressure if the height of the water exit is 729.3 metres?

a) 745 kPa
b) 538 kPa
c) 235 kPa
d) 442 kPa

Answer 24

d) 442 kPa

The water pressure at the exit can be calculated by subtracting the
pressure loss due to elevation gain from the initial pressure. The elevation gain is
729.3m - 724.5m = 4.8m. The pressure loss is 4.8m x 9.81kPa/m = 47.1kPa.
Therefore, the final pressure is 490kPa - 47.1kPa = 442.9kPa, which is
approximately 443kPa.

Question 25

How should the heating element be positioned when building a baseboard/wall fin enclosure?

a) Immediately after the zone control valve.

b) Split it up equally along the wall.

c) Where there is no damper control.

d) Close as possible to the highest heat loss.

Answer 25

d) Close as possible to the highest heat loss.

Question 26

What kind of pipe is used to transport water through a hot water heater?

a) Supply
b) DWV
c) Hot water pipe

Answer 26

c) Hot water pipe

Question 27

What function does a line scoop serve in a hydronic heating system?

a) Controls the flow of the heating medium.

b) Controls the expansion of the heating medium.

c) Removes gases from the heating medium.

d) Separates gases from the heating medium.

Answer 27

c) Removes gases from the heating medium

Question 28

20 psi cut-in and 40 psi cut-out are programmed into a pressure switch. What air pressure is suggested for the diaphragm tank for optimal system performance?

a) 3-5 psi below cut in pressure.
b) A maximum of 40 psi.
c) A minimum of 20 psi.
d) 3-5 psi below cut out pressure.

Answer 28

a) 3-5 psi below cut in pressure.

Question 29

if the water service pressure exceeds__________, a pressure-reducing valve must be
fitted.

a) 65 psi (450 Kpa)
b) 80 psi (550 Kpa)
c) 100 psi (690 Kpa)
d) 50 psi (344 Kpa)

Answer 29

b) 80 psi (550 Kpa)

Question 30

Bronze is a typical material for valve construction. Most bronze valves are?

a) available in smaller sizes only
b) available in larger sizes only
c) susceptible to corrosion
d) used in high pressure applications

Answer 30

c) susceptible to corrosion

Question 31

This kind of trap is prohibited in drainage systems.

a) bell trap
b) S trap standard
c) P trap
d) drum trap

Answer 31

bell trap

Explanation: Bell traps are prohibited in drainage systems because they are not
self-cleaning and can easily become blocked, leading to drainage issues.

Question 32

Which of the following should never come into touch with polybutylene piping?

a) caulk
b) copper
c) brass
d) petroleum based materials

Answer 32

d) petroleum based materials

Question 33

In reference to a PVC DWV pipe system strung horizontally across a hallway
in the basement of a health facility with a distance of 138 metres, how many hangers are required to accomplish the job?

a) 120
b) 116
c) 138
d) 98

Answer 33

c) 138

Question 34

Why are pipe wrenches not used on component surfaces that have been
finished?

a) A pipe wrench does not have serrated teeth for gripping work

b) A pipe wrench will not grip on a finished machined surface

c) A pipe wrench has serrated teeth that bite into the work surface and can damage or permanently scratch the part

d) A pipe wrench is not made in sizes large enough to grip most work

Answer 34

c) A pipe wrench has serrated teeth that bite into the work surface and can
damage or permanently scratch the part

Question 35

How is the branch pipe placed on a pneumatic system?

a) Level from the main to the outlet.
b) Graded toward the compressor.
c) Graded from the main to the outlet.
d) Level from the main to the first drop.

Answer 35

c) Graded from the main to the outlet.

Question 36

When a template must be found on a pipe but a centre finder is unavailable, what other method may be utilised to correctly indicate the
centerline?

a) Wrap-around.
b) 2-ft. level and plumb bob.
c) Measuring tape
d) Framing square and level.

Answer 36

a) Wrap-around.

Question 37

Between a faucet and a water pipe, this is the word for the shut-off valve. The outlet forms a 90-degree angle with the faucet, and the inlet connects to the wall’s water supply pipe.

a) angle stop
b) stop valve
c) anode rod

Answer 37

a) angle stop

Question 38

The hydraulic load of a combined building sewer is 345 fixture units and 9,280
litres of rain water. What is the minimum pipe size necessary for a 1 in 100 slope?

a) 10
b) 8
c) 12
d) 6

Answer 38

b) 8

Question 39

What kind of thread is included on every acetylene fitting?

a) metric
b) pipe
c) left handed
d) right handed

Answer 39

c) left handed

Question 40

Which of the following is not a hot water heating pipe system?

a) two pipe direct return
b) series loop
c) one pipe gravity return
d) two pipe reverse return

Answer 40

c) one pipe gravity return

Question 41

What does the manufacturer propose for the installation of the patented overflow (PO) when installing a cultured marble plumbing fixture?

a) Apply plumbers grease to threaded parts.
b) Use silicon on the fixture.
c) Apply pipe joint lubricant to threaded parts.
d) Use plumber’s putty.

Answer 41

b) Use silicon on the fixture.

Question 42

Which pipe material would be utilised to transport milk products in a dairy?

a) Galvanized iron.
b) Grey cast iron.
c) Stainless Steel.
d) Copper bearing steel.

Answer 42

c) Stainless Steel.

Question 43

Every oil interceptor must be equipped with two vent pipes, but which of the following assertions about venting regulations is false?

a) connect to interceptor at opposite ends
b) do not connect to any other vent pipe
c) connect to each other
d) extend to open air

Answer 43

c) connect to each other

Question 44

When sizing this vent, does length not have a role?

a) circuit vent
b) header
c) relief vent
d) stack vent

Answer 44

b) header

Question 45

What tool should be used to inspect the electrical outlet?

a) voltmeter
b) megohmmeter
c) ammeter
d) ohmmeter

Answer 45

a) voltmeter

Question 46

46) Magnesium and Calcium are the most prevalent minerals in hard water.

a) False
b) True

Answer 46

b) True

Question 47

If a chute discharges into a room without a closure at the chute outlet, the room must be protected from the rest of the building by a fire separation with a?

a) no more than 2 h
b) no less than 1 h
c) no more than 1 h
d) no less than 2 h

Answer 47

b) no less than 1 h

Question 48

What colour is the L type?

a) Black
b) Blue
c) Yellow
d) White

Answer 48

b) Blue

Question 49

A client complains that their gas-powered hot water heater is no longer producing enough hot water. Which component of the hot water heater needs replacement?

a) Mixing valve.
b) Anode rod.
c) Thermocouple.
d) Dip tube.

Answer 49

d) Dip tube.

If a gas-powered hot water heater is not producing enough hot
water, the dip tube may need replacement. The dip tube directs cold water to
the bottom of the tank for heating and can affect water heating if
malfunctioning

Question 50

This is installed on the tank of a water heater to prevent corrosion.

a) dip tube
b) alpha rod
c) insulation tube
d) anode rod

Answer 50

d) anode rod

Question 51

You are tasked with cutting a triangle-shaped hole in the wall. After being chopped, the triangle’s opening produces a 30-60 degree right triangle. The triangle’s longest side measures 10 feet. The shortest side will measure
approximately?

a) 4
b) 5
c) 7.5
d) 6

Answer 51

b) 5

In a 30-60-90 degree right triangle, the shortest side (opposite the
30-degree angle) is half the length of the hypotenuse (longest side). So, if the
hypotenuse is 10 feet, the shortest side is 10 / 2 = 5 feet.

Question 52

Which device is put within the building when the building drain (BD) is positioned below the level of the adjacent street?

a) A normally open backwater valve on the weeping tile.

b) A normally open backwater valve on the BD.

c) A backflow preventer on the service.

d) A normally closed backwater valve on the BD.

Answer 52

b) A normally open backwater valve on the BD.

Question 53

What apparatus stops gas from entering a structure?

a) P trap
b) anti syphon valve
c) Back flow preventer

Answer 53

c) Back flow preventer

Question 54

What is the expansion tank’s primary role in a hot water system?

a) It collects the air in the system, thus preventing air lock of the system while in
operation.

b) It acts as a safety chamber in case of over firing of the boiler.

c) It provides the necessary space for the air required in the system.

d) It allows the volume of the water in the system to change to maintain working
pressure.

Answer 54

d) It allows the volume of the water in the system to change to maintain working
pressure.

Question 55

Which piping process is required to complete and stop oil interceptor
venting?

a) Terminate them outside the building at a height
difference of at least 12”

b) Terminate them outside the building at the same height.

c) Tie them together outside the building 12” above grade.

d) Connect them to the building plumbing vent system.

Answer 55

a) Terminate them outside the building at a height difference of at least 12”

Question 56

How high would water in a 2in vertical water pipe be lifted if there is a pressure of 30psi at the street level?

a) 67.4
b) 74.2
c) 69.12
d) 70.85

Answer 56

c) 69.12

Water pressure is typically converted into head height using the formula:
Head (ft) = Pressure (psi) × 2.31. So, for 30psi, the head height is 30 × 2.31
≈ 69.3 feet.

Question 57

If 800 feet of pipe weighs 1000 pounds, how much would 180 feet of pipe
weigh?

a) 218lbs
b) 235lbs
c) 225lbs
d) 216lbs

Answer 57

c) 225lbs

To find the weight of 180 feet of pipe, use the proportion: 800 feet/1000 pounds = 180 feet/x pounds. Solving for x gives you 225 pounds

Question 58

The water level in a private water well is 30 feet below the earth. Which pumping system is optimal for this installation?

a) Deep well jet pump with one suction and one drive pipe.
b) Gear pump in well with pressure relief valve.
550
c) Convertible jet system with two suction pipes.
d) Submersible pump with foot valve.

Answer 58

d) Submersible pump with foot valve.

Question 59

What colour coding is utilised for the labelling of medicinal air gases?

a) Blue and silver.
b) Black and white.
c) Yellow and silver.
d) Green and white

Answer 59

b) Black and white.

Question 60

Which sort of piping connections would be used in process piping systems when pipe sections are often replaced?

a) Welded.
b) Flanged.
c) Threaded.
d) Flared.

Answer 60

b) Flanged

Question 61

Must biohazardous waste receiving laboratory sinks be installed?

a) cleanout above the flood level rim
b) Interceptor for organic waste
c) backwater valve
d) check valve

Answer 61

a) cleanout above the flood level rim

Question 62

The oxygen cylinder’s valves must be opened.

a) Fully opened
b) 3 turns
c) ½ turn
d) 1 ½ turn

Answer 62

c) ½ turn

Question 63

How is bell and spigot cast iron installed?

a) bell upstream
b) doesn’t matter
c) spigot upstream
d) bell downstream

Answer 63

a) bell upstream

Question 64

Which component of a water-tube boiler guides air to the expansion tank connection?

a) Automatic air vent.
b) Centrifugal air scoop.
c) Bourdon tube.
d) Tank fitting.

Answer 64

b) Centrifugal air scoop.

Question 65

How would you define a Class B fire?

a) Fires that involve combustible metals such as magnesium and sodium.
b) Fires that involve energized electrical equipment, such as wiring, controls,
motors or appliances.
c) Fires involving common combustibles such as wood, paper, cloth, rubber and
trash.
d) Fires involving flammable liquids, gases, gasoline and synthetic or oilbased
products.

Answer 65

d) Fires involving flammable liquids, gases, gasoline and synthetic or oilbased
products.

Question 66

What extra equipment must be installed at the building end of a PE (polyethylene) water supply for cold water applications?

a) Testable backflow preventer.
b) Check valve c/w diaphragm tank.
c) Pressure Relief Valve c/w thermal expansion compensator.
d) Pressure reducing valve c/w valved bypass.

Answer 66

d) Pressure reducing valve c/w valved bypass.

Question 67

Most typically, medical gas pipework is linked by?

a) compression joints
b) silver braze
c) lead free solder
d) flared joints

Answer 67

b) silver braze

Question 68

Minimum flow rate required for a toilet.

a) 1gpm
b) .5gpm
c) 1.5gpm
d) 5gpm

Answer 68

c) 1.5gpm

Question 69

In which of the following is a vent stack necessary when back vents, relief vents, or circuit vents are installed?

a) every 4 storey residential building
b) conjunction with every soil stack provided in a building
c) all buildings other than a residential building
d) every two storey industrial building

Answer 69

b) conjunction with every soil stack provided in a building

Question 70

When does a spring-loaded inline trap primer inject water into the trap it serves?

a) A flush tank for a urinal discharges.
b) A flush valve for a urinal or water closet operates.
c) The faucet through which it is supplied is opened and closed.
d) The solenoid valve on the supply is opened by a timer.

Answer 70

b) A flush valve for a urinal or water closet operates.

Question 71

When the floor is sprinkled, which of the following is not a suitable method of smoke ventilation?

a) fixed glass windows
b) operable windows
c) building exhaust system
d) smoke shafts

Answer 71

a) fixed glass windows

Question 72

Where is the jet in a deep well located?

a) above the foot valve
b) below the foot valve
c) top of the well
d) at the pump

Answer 72

b) below the foot valve

Question 73

A vertical storm drainage pipe traverses a five-story structure. How many floor supports are required to achieve code minimums?

a) 4 riser clamps.
b) 4 clevis hangers.
c) 3 clevis hangers.
d) 3 riser clamps.

Answer 73

d) 3 riser clamps.

Question 74

Which approach is utilised to get the optimal pumping rate from a two-pipe convertible deep well jet system while observing the pressure gauge?

a) Adjust the range nut with the pump running.
b) Throttle the pump discharge control valve.
c) Adjust the differential nut with the pump running.
d) Open the pump discharge control valve fully.

Answer 74

b) Throttle the pump discharge control valve.

Question 75

75) What is the proper name for the hanger seen below?

a) split
b) band
c) clevis
d) ring swivel

Answer 75

c) clevis

Question 76

With a chemical pot feeder supplying a closed hydronic heating system, what is installed?

a) circulating pump
b) isolating valves
c) pressure relief valve
d) injectors

Answer 76

c) pressure relief valve

Question 77

With a drop of 84 inches and a run of 200 feet, what is the grade?

a) 0.42
b) 0.048
c) 0.0046
d) 10

Answer 77

b) 0.048

The grade is calculated by dividing the drop by the run and then converting to a percentage.
( \text{Grade} = \frac{84 \text{ in.}}{200 \text{ ft.}
\times 12 \text{ in./ft.}} \approx 0.035 ), or about 0.048 when converted to a
percentage.

Question 78

in an underground drainage system, what is the minimum depth of cold caulking compound necessary for a 150 mm cast iron hub and spigot joint?

a) 15mm
b) 25mm
c) 120mm
d) 40mm

Answer 78

b) 25mm

Question 79

Which of the parts below may be circuit vented?

a) horizontal branch
b) vertical branch
c) parallel
d) 3inch branch

Answer 79

a) horizontal branch

Question 80

Which water treatment equipment is used to eliminate the taste and odour
of water?

a) Iron filter.
b) Activated carbon filter.
c) Sand filter.
d) Water softener.

Answer 80

b) Activated carbon filter.

Question 81

What is the minimum size of a wet vent feeding a water closet?

a) 3in
b) 2in
c) 1 ½ in
d) 1in

Answer 81

b) 2in

Question 82

Which method is suggested for preventing corrosion in hydronic systems?

a) Chemically maintain a soft water condition.
b) Add fresh water on a regular basis.
c) Maintain a 50% ethylene glycol solution.
d) Chemically maintain an alkaline pH value.

Answer 82

d) Chemically maintain an alkaline pH value.

Question 83

How is the quantity of heat escaping from a baseboard enclosure regulated?

a) Reflective backing.
b) Pivoting damper.
c) Installation height.
d) Perforated enclosure.

Answer 83

b) Pivoting damper.

Question 84

What must be completed before connecting the dishwasher waste line to a
trash grinder connected to a kitchen sink?

a) Install a vacuum breaker on the cold water line.
b) Remove the garbage grinder knock out plug.
c) Install the garbage grinder downstream of the fixture trap.
d) Increase the continuous waste one pipe size.

Answer 84

b) Remove the garbage grinder knock out plug.

Question 85

In which fixtures and appliances must a shut-off valve be fitted in a public
building?

a) Kitchen sink, water closet, and hot water tank only.
b) Water closet, hot water tank, and lawn service only.
c) Water closets only.
d) All fixtures and appliances.

Answer 85

d) All fixtures and appliances.

Question 86

Where should a fin tube radiator be placed inside a room?

a) doesn’t matter
b) under a window
c) where space permits
d) homeowners preference

Answer 86

b) under a window

Question 87

What role do oxygen and acetylene regulators play?

a) they control the working pressure
b) they mix gases for combustion
c) they keep gases separate
d) they increase cylinder pressure

Answer 87

a) they control the working pressure

Question 88

On a hydronic heating system, where is a flow switch installed?

a) On the injection pump discharge line.
b) Adjacent to the aquastat on the boiler.
c) On the return main where it drops to the boiler.
d) Above the safe water line on the boiler.

Answer 88

c) On the return main where it drops to the boiler.

Explanation: In a hydronic heating system, a flow switch is typically installed on the return main where it drops to the boiler. This ensures that the boiler fires only when there is a demand for heat.

Question 89

What size drain is necessary for a tub-shower combination?

a) 1 ½in
b) 1in
c) 2in
d) 2 ½ in

Answer 89

a) 1 ½in

Question 90

How much pipe must be removed when a piece of an existing cast iron building drain is ripped out to install a MJ wye?

a) 1/4 to 1/2 in. longer than the wye.
b) 1/4 to 1/2 in. shorter than the wye.
c) Same as the wye.
d) 1/2 to 1 in. longer than the wye.

Answer 90

b) 1/4 to 1/2 in. shorter than the wye.

Question 91

What is the total drop if the incline is 1% and the distance is 50 feet?

a) 5inches
b) 6inches
c) 7inches
d) 6.5 inches

Answer 91

6inches

With a 1% incline over a distance of 50 feet, the total drop is calculated as 1% of 50 feet. Since 1% of 50 feet is 0.5 feet, and there are 12 inches in a foot, the drop is 6 inches.

Question 92

What size “P” trap is required for a kitchen?

a) 2 ¼ in
b) 2 inch
c) 1 ½ in
d) 1 ¾

Answer 92

c) 1 ½ in

Question 93

Where there is a danger of fire and high temperatures, these sorts of valves
are used.

a) PVC
b) aluminum
c) Steel
d) PE

Answer 93

c) Steel

Question 94

Grey water is a kind of wastewater that originates from?

a) toilets and garbage disposal
b) toilets
c) sink showers and bath tubs
d) toilets and bath tubs

Answer 94

c) sink showers and bath tubs

Question 95

Nominally vertical refers to an angle no more than _______ degrees from the vertical?

a) 45
b) 60
c) 11 ¼
d) 22 ½

Answer 95

d) 22 ½

Question 96

A flashback arrestor protects the operator from what while using oxy-fuel cutting and welding equipment?

a) electrical shock
b) bright flashes
c) material blowback
d) flame traveling into the hoses

Answer 96

d) flame traveling into the hoses

Question 97

Which method and tube weight would enable a consistent 90-degree bend
without crimping?

a) Hand bending using a minimum of type M copper tube.
b) Use a lever style tube bender and type L copper tube.
c) Swedge using a minimum of type L copper tube.
d) Use an external spring bender and type M copper tube.

Answer 97

b) Use a lever style tube bender and type L copper tube.

Question 98

The two most widespread types of Teflon thread sealants are liquid and?

a) stick
b) tape
c) spray
d) gelatin

Answer 98

b) tape

Question 99

Which of the following is the proper size for normal 8-inch bolts? × 13 ½ in. flanges?

a) 5/8 in. X 3 ½ in.
b) 9/16 in. X 3 in.
c) ¾ in. X 3 ½ in.
d) 5/8 in. X 4 in.

Answer 99

c) ¾ in. X 3 ½ in.

Question 100

What are the benefits of using a torque limiting wrench?

a) It allows you to determine the weight of the nut and bolt

b) It allows you to measure how far a bolt is threaded into a work piece

c) It allows you to measure the amount of tightening of a threaded fastener

d) It allows you to double the amount of tightening force

Answer 100

c) It allows you to measure the amount of tightening of a threaded fastener