Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

666 IP > Plumbing IP Review #1 Part B > Flashcards

Plumbing IP Review #1 Part B Flashcards

1
Q
  1. To shorten the time between flashes of a tank type urinal, the plumber would
    a. Increase the supply pressure
    b. Decrease the supply pressure
    c. Turn the stem on the control stop clockwise
    d. Turn the stem on the control stop counter clockwise
A

d. Turn the stem on the control stop counter clockwise

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q
  1. The standard height of the flood level rim of a regular water closet bowl is:
    a. 14”
    b. 15”
    c. 16”
    d. 18”
A

c. 16”

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q
  1. the thread used on standard pipe and fittings is called
A

NPT

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q
  1. After tightening a feeling by hand, it is turned by a wrench
A

Approximately 2 1/2 to 3 turns

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q
  1. Where a hazardous material is transferred by piping system, the system must be
A

Identified

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q
  1. WHMIS legislation covers the responsibility of the employer to provide
    a. Worker benefits
    b. Worker medical coverage
    c. Worker education on controlled products
    d. Workplace room cabinets for use when opening a controlled products
A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q
  1. WHMIS legislation provides workers and employers with:
    a. And insurance policy
    b. Information on hazardous materials
    c. Information on all types of material
    d. Protection from hazardous material
A

b. Information on hazardous materials

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q
  1. An average thread is cut approximately
    a. Seven threads long
    b. Eight threads long
    c. 12 threads long
    d. 27 threads long
A

c. 12 threads long

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q
  1. WHMIS stands for
A

Workplace hazardous material information system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q
  1. What is the number of threads per inch for a 1 1/4 inch pipe?
    a. 8
    b. 11.5
    c. 14
    d. 18
A

b. 11.5

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q
  1. What is the function of a ball drip used on a fire department connection
    a. Maintain the water supply to the building
    b. drain Siamese connection
    c. To drain the ball valve on a Siamese connection
    d. Keep the dry pipe system filled with water
A

b. drain Siamese connection

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q
  1. The upper end of every soil or waste stack shall terminate and
    a. A vent stack
    b. A relief vent
    c. A stack vent
    d. A vent header
A

c. A stack vent

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q
  1. Practically all pipe threads are:
    a. Left hand
    b. Seven left hand threads and four right hand threads
    c. Right hand
A

c. Right hand

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q
  1. What is the purpose of the small chain attached the control valve for a flush tank of a urinal?
    a. To prevent vandalism
    b. to stop noise and splashing
    c. To help support the left ball linkage
    d. Connect the flash club to the flush valve handle
A

b. to stop noise and splashing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q
  1. Backing is not required for which one of the following fixtures?
    a. vanity basin
    b. Pedestal basin
    c. Wall hung basin
    d. Barrier free wall hung basin
A

a. vanity basin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q
  1. In areas subject to heavy frost conditions, the minimum size of the vent termination serving an individual vented bathtub shall not be less than
    a. 1 1/4 inch
    b. 1 1/2 inch
    c. 2 inch
    d. 3 inch
A

d. 3 inch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q
  1. Minimum length of lead stub between the underside of the closet flange and the copper ferrule is:
    a. Four-inch
    d. 3 inch
    c. twice the diameter of the ferrule
    d. As long as possible
A

d. 3 inch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q
  1. Submersible well pump’s often have high shut off heads. To avoid damage to the system components and piping, what can be installed?
    a. Pressure relief valve
    b. A pneumatic tank
    c. A check valve
    d. A water hammer arrester
A

a. Pressure relief valve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q
  1. If you had to install a lavatory basin or similar fixture with no waste an overflow, how would you guard against possible overfilling of the fixture?
    a. Install self closing faucet
    b. Install an automatic syphon
    c. Install a float valve
    d. Install a pressure regulator
    a. Pressure relief valve
A

a. Install self closing faucet

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q
  1. When a break occurs in a waterman, what is likely to occur within the house piping?
    a. Reduce pressure
    b. Increased pressure
    c. Negative pressure
    d. Positive pressure
A

c. Negative pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q
  1. On the installation of a shampoo basin, what protective device is installed to prevent back siphonage?
    a. Check valve
    b. An air gap
    c. Vacuum breaker
    d. Pressure vacuum breaker
A

c. Vacuum breaker

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q
  1. to ensure that bacteria is eliminated in a commercial dishwasher, the final rinse temperature should be no less than ____
    a. 180°F
    b. 170°F
    c. 160°F
    d. 140°F
A

a. 180°F

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q
  1. The water supply to a potato peeler is always installed
    a. In the bottom of the peeler
    b. Directly into the side above the abrasive plate
    c. By the use of an air gap
    d. There is no water supply
A

c. By the use of an air gap

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q
  1. Clean outs for to a rotting are to be installed on a building drain or branch at 50 feet intervals what minimum size would piping be?
    a. Less than 2 inch
    b. 2 1/2 inch or less
    c. 3 inch
    d. 4 inch
A

d. 4 inch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q
  1. What is the minimum size opening for cleanouts that are 50 feet apart and are capable of two way rodding?
    a. Same size as the drainage pipe
    b. 1 1/2 inch
    c. 2 inch
    d. 3 inch
A

a. Same size as the drainage pipe

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q
  1. The minimum size airgap allowable is
    a. Two times the diameter of the supply
    b. 1 inch or 1 1/2 times the diameter of the supply
    c. 1 inch or two times the diameter of the supply
    d. Always 1 inch
A

c. 1 inch or two times the diameter of the supply

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q
  1. If it was required to have a sink full of water, with the hot water running continuously, what device could be used to achieve this?
    a. Install a standpipe
    b. Install a pop-up waste
    c. Install a flow control fitting
    d. Install a standing waste
A

d. Install a standing waste

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q
  1. Which of the following is not a purpose of a plumbing vent?
    a. Prevent odours from entering the building via the drainage system
    b. Prevent animals and insects from entering the building via the drainage system
    c. Prevent drafts from entering the building via drainage system
    d. Prevent noise from entering the building via the drainage system
A

d. Prevent noise from entering the building via the drainage system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q
  1. An existing pipe is 2 1/2 inches ID and has to be replaced by two pipes equal in size. If the two pipes are to supply at least as much flow as the original what is the smallest idea for these pipes
    a. 1 inch
    b. 1 1/4 inch
    c. 1 1/2 inch
    d. 2 inch
A

d. 2 inch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q
  1. A component of a hydronic system that employees and ends which is a
    a. Thermostat with anticipator
    b. Circuit series balancing valve
    c. Aquastat with manual reset
    d. Four wire zone valve
A

d. Four wire zone valve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q
  1. Which of the following would be used to assure trap seal protection?
    a. Vent the trap
    b. Use a trap primer
    c. Use a deep sealed trap
    d. Use an S trap
A

b. Use a trap primer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q
  1. If the hydraulic load of an S trap standard was three fixture units, what would the trap size be?

A. One and a half in

B. 2 inch

c. 2 1/2 inch
d. 3 inch

A

d. 3 inch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q
  1. What approximate acetylene and oxygen pressures would you likely use for cutting quarter inch mild steel?
    a. 37 acetylene, 7 oxygen
    b. 7 acetylene, 37 oxygen
    c. 5 acetylene, 15 oxygen
    d. 15 acetylene, 40 oxygen
A

b. 7 acetylene, 37 oxygen
5: 1 ratio

15 acetlene is max; over 15 is unstable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q
  1. What would be expected at the base of a riser?
    a. A colour-coded label
    b. A drain valve
    c. Shut off valve
    d. Balancing valve
A

c. Shut off valve

IP Question

Must inform building manager if shutting off water to a building

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q
  1. What is the maximum distance between clean out on a 4 inch sanitary building drain? (installation is to have a minimum number of cleanouts)
    a. 7.5 m (20’)
    b. 15 m (50’)
    c. 30m (100ft)
    d. 52m (200ft)
A

c. 30m (100ft)

one way rodder 15m max

two way rodding 30m max

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q
  1. Shallow well pump is installed directly above are well. What determines the depth to which the water can be accessed?
    a. Atmospheric pressure
    b. Horsepower of the pump
    c. Diameter of the drop pipe
    d. Amount of water in the pressure tank
A

a. Atmospheric pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q
  1. The effectiveness of an air chamber depends primarily upon: (choose the best answer)
    a. Length of the chamber
    b. Diameter of the chamber
    c. Ratio of the diameter to length
    d. Volume of air in the chamber
A

d. Volume of air in the chamber

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q
  1. Residential wall hung toilet would most likely be which one of the following bowl type:
    a. Syphon jet or reverse trap with jet
    b. Washdown
    c. Blow out
    d. Wash jet
A

a. Syphon jet or reverse trap with jet

blow out requires 1”, not typically found in residential

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
39
Q
  1. The relief of piping from a hot water tank shouldn’t be pipe directly into a floor drain because:
    a. The hot water will damage the trap
    b. The force of the water might empty the trap
    c. Contamination of the portable water system may occur
    d. A dripping valve may go unnoticed
A

c. Contamination of the portable water system may occur

40
Q
  1. What does ASME stand for?
A

American Society of mechanical engineers

41
Q
  1. Under similar temperature conditions, the expansion rate of copper pipe is
    a. More than steel pipe
    b. Less than steel pipe
    c. Equal to steel pipe
    d. Steel pipe does not expand
A

a. More than steel pipe

42
Q
  1. Durham fitting is used in:
    a. High pressure steam piping
    b. Low pressure steam piping
    c. Low pressure potable water piping
    d. Drainage piping
A

d. Drainage piping

43
Q
  1. a clinic sink is a hospital fixture that is used for:
    a. Rinsing bed pans out
    b. Washing of surgeons hands
    c. Disposing of medical waste
    d. Sterilizing utensils
A

a. Rinsing bed pans out

44
Q
  1. What is the purpose of the fire department connection on the outside of a building

a To fight grass fires adjacent to the building

b. Supply water from the building to a fire nearby
c. Allow the fire department to boost the water pressure in the system
d. Allow building sprinkler system to drain

A

c. Allow the fire department to boost the water pressure in the system

45
Q
  1. “Diamomaceous earth” is:
    a. Black in colour
    b. A gas and its normal state
    c. A remote planet in our solar system
    d. Used as a pool filter
A

d. Used as a pool filter

46
Q
  1. According to most fixture rough in books, a standard wall hung basin waste pipe rough-in would be closest to
    a. 12 inch AFF
    b. 16 inch AFF
    c. 18 inch AFF
    d. 22 inches AFF
A

c. 18 inch AFF

47
Q
  1. Which of the following would require the installation of an RPPA?
    a. An irrigation system using chemical injection
    b. Fire sprinkler system using antifreeze
    c. Hospital water service
    d. All of the above
A

d. All of the above

48
Q
  1. The minimum number of sides of planks for a working platform is
    a. One plank, 1 1/2” x 10”
    b. Two planks, 2” x 8”
    c. Two planks, 2” x 10”
    d. Three planks, 2” x 6” with plywood binding
A

c. Two planks, 2” x 10”

49
Q
  1. Chlorination will remove:
    a. Temporary colour from water
    b. Temporary hardness from water
    c. Harmful bacteria from water
    d. None of the above
A

c. Harmful bacteria from water

50
Q
  1. Brien is used in which of the following cycles of a water softener
    a. Backwash
    b. Regeneration
    c. Rinse
    d. Wash
A

b. Regeneration (2nd)

back wash is (1st)

rinse and flush (3rd)

51
Q
  1. The brine from a water softener
    a. Should not be drained into a septic tank
    b. Is poisonous
    c. Will usually not affect the septic process
    d. Is not corrosive
A

c. Will usually not affect the septic process

52
Q
  1. Too much manganese in water could cause
    a. Black stains on fixtures
    b. Green stains on fixtures
    c. Yellow stains on fixtures
    d. Blue stains in laundry
A

a. Black stains on fixtures

53
Q
  1. The process used to speed up the sedimentation a phone suspended matter in water is called:
    a. Chlorination
    b. Flocculation
    c. filtration
    d. septication
A

b. Flocculation

54
Q
  1. A “catspaw” is used in rigging to:
    a. Stop a load from see sawing on a hook
    b. Tie a load to a hook
    c. guide the load
    d. lift long lengths of pipe
A

a. Stop a load from see sawing on a hook

55
Q
  1. The term zeolite refers to
    a. brine in a water softener
    b. Softening agent in a water softener
    c. Salt in a water softener
    d. Sand in a water softener
A

b. Softening agent in a water softener

56
Q
  1. A bowline on the bight is tied to:
    a. At the top of the rope
    b. In the middle of the rope
    c. With an underhand loop
    d. With a clove hitch
A

b. In the middle of the rope

57
Q
  1. Wall through urinal is
    a. Prohibited from installation
    b. Permitted for installation
    d. Sanitary
    d. A water saver fixture
A

a. Prohibited from installation

58
Q
  1. Negative pressure in a plumbing drain, waste and vent system can cause a trap to lose its seal by
    a. capillary action
    b. Siphonage
    c. Evaporation
    d. Oscillation
A

b. Siphonage

59
Q
  1. Plumbing, the term for nominally horizontal refers to a pipe created to
    a. Maximum half inch per foot
    b. A maximum of 10% grade
    c. Less than 45° angle with the horizontal
    d. Minimum of 2% grade
A

c. Less than 45° angle with the horizontal

60
Q
  1. A Piston pump:
    a. Is a positive displacement pump
    b. Uses an impeller
    c. Uses a gear
    d. Is non-positive displacement pump
A

a. Is a positive displacement pump

61
Q
  1. A Douglas flush valve is a name used to describe which of the following:
    a. A water closet on an aircraft
    b. An overflow and flapper assembly of a tank type water closet
    c. Automatic flushing siphon of a urinal tank
    d. Flush valve for a blow out water closet
A

b. An overflow and flapper assembly of a tank type water closet

62
Q
  1. Which of the following is not considered to be adequate protection of portable water systems against back siphonage backflow:
    a. Double check valve assembly
    b. Reduced pressure backflow assembly
    c. Vacuum relief valve
    d. Vacuum breaker
A

c. Vacuum relief valve

63
Q
  1. Example of a direct cross connection would be:
    a. Portable Water main connected to a plumbing vent
    b. How was laying in the depression of a line
    c. A hose connected to a laundry tub faucet and extending into the tub
    d. All of the above
A

a. Portable Water main connected to a plumbing vent

the others are potential

64
Q
  1. Reverse acting aquastat used in a hydronic heating system would be used to
    a. Activate the burner
    d. Activate the zone valve
    c. Activate the circulator
    d. Activate the compressor
A

c. Activate the circulator

65
Q
  1. The suggested flood level rim height for a wall hung basin is:
    a. 29 inches
    b. 31 inches
    c. 36 inches
    d. 42 inches
A

b. 31 inches

66
Q
  1. Flush elbow is:
    a. The elbow used on the water supply pipe installed flush with the wall
    b. An elbow used with a flush o meter valve
    c. The pipe that connects a wall hung tank to the toilet bowl
    d. None of the above
A

c. The pipe that connects a wall hung tank to the toilet bowl

67
Q
  1. Direct flush valve of a water closet should be adjusted to:
    a. Adequately flush the ball using the least amount of water
    b. Flush for a minimum of 60 seconds
    c. Flush a minimum of 5 gallons
    d. All of the above
A

a. Adequately flush the ball using the least amount of water

68
Q
  1. Marble chips would be used in conjunction with a
    a. Grease interceptor
    b. Acid interceptor
    c. Grit interceptor
    d. Plaster interceptor
A

b. Acid interceptor

69
Q
  1. Oil and gasoline interceptor must have vents connected:
    a. To the top of the sump
    b. At the top at both ends of the sump
    c. Outside the sump
    d. Downstream the sump
A

b. At the top at both ends of the sump

70
Q
  1. The vents for a gasoline and oil interceptor shall terminate directly in an open air and:

A. At the same level

b. At levels differing by 6 inches
c. Levels differing by 12 inches
d. Connected together

A

c. Levels differing by 12 inches

71
Q
  1. A pan for a hot water tank must have sides that are at least _____ high:
    a. 1”
    b. 2”
    c. 3”
    d. 4”
A

a. 1”

72
Q
  1. The anode rod in a hot water tank helps to prevent:
    a. scale from forming on the inside of the tank
    b. corrosion of the inside of the tank
    c. cold water from leaving through the hot pipe
    d. overheating of the tank
A

b. corrosion of the inside of the tank

73
Q
  1. A small hole is located near the top of the deck tube of a hot water tank to prevent:
    a. Overheating of the tank
    b. Siphonage of the water from a tank
    c. Cold water being drawn from the tank
    d. Collapse of the tank from a vacuum
A

b. Siphonage of the water from a tank

74
Q
  1. The dip tube in a hot water tank is located:
    a. On the hot outlet
    b. On the drain fitting
    c. On the cold inlet
    d. The relief valve
A

c. On the cold inlet

75
Q
  1. The minimum air gap shall be:
    a. 1”
    b. 2”
    c. 3”
    d. 4”
A

a. 1”

76
Q
  1. Too much iron in water can cause
    a. Green stains on the fixture
    b. Red stains on fixtures
    c. Blue stains on fixtures
    d. Black stains on fixtures
A

b. Red stains on fixtures

77
Q
  1. Backflow preventer installed on the outlet of a fixture control valve would likely be a:
    a. Double check valve assembly
    b. Pressure vacuum breaker
    c. Reduced pressure backflow assembly
    d. Atmospheric vacuum breaker
A

d. Atmospheric vacuum breaker

78
Q
  1. Of the methods used to prevent cross connection contamination, the highest protection provided is usually by the installation of:
    a. An RPBA
    b. a DCVA
    c. an air gap
    d. a vacuum breaker
A

c. an air gap

79
Q
  1. Pressure vacuum breaker will start backflow
    a. Caused by back siphonage only
    b. Caused by back pressure only
    c. Caused by either back pressure or back siphonage
    d. Caused by tall buildings
A

a. Caused by back siphonage only

80
Q
  1. Hot water tank must have a shut off valve located:
    a. On the cold water inlet
    b. On the relief valve piping
    c. On the relief valve piping
    d. On both the hot and cold lines
A

a. On the cold water inlet

81
Q
  1. Indirect (momentum) siphonage of a trap:
    a. Causes a negative pressure in the drainage system
    b. Causes a postive pressure in the drainage system
    c. Is due to excessive fall from the fixture to the trap inlet
    d. Is due to the operation of other fixtures in the system
A

d. Is due to the operation of other fixtures in the system

82
Q
  1. Piping material not approved for an interior leader is:
    a. Asbestos cement
    b. ABS
    c. Sheet metal
    d. Copper
A

c. Sheet metal

83
Q
  1. The anode rod in a hot water tank
    a. Becomes smaller in use
    b. Becomes larger in use
    c. Remains the same size in use
    d. Is never used anymore
A

a. Becomes smaller in use

84
Q
  1. The radius of a circular tank is 21 inches. It’s circumference would be:
    a. 5’-6”
    b. 9’
    c. 11’
    d. 13’ - 6”
A

c. 11’

85
Q
  1. A hot water tank, under pressure of 75 psig, has a faulty thermostat and continues to heat. If the T & P relief valve was also stuck in the closed position, the result would be:
    a. The water would change to steam when the temperature reaches 212°F
    b. The pressure would go over 75 psig while the temperature remains at 212°F
    c. The temperature would increase while the pressure remains at 75 psig
    d. The pressure would increase while the temperature rises to more than 212°F
A

d. The pressure would increase while the temperature rises to more than 212°F

86
Q
  1. The minimum degree of hardness in water that warrants the installation of softening equipment is
    a. 7 to 10 1/2 GPG
    b. 10 1/2 to 25 GPG
    c. 25 to 50 GPG
    d. Over 50 GPG
A

b. 10 1/2 to 25 GPG

87
Q
  1. Which of the following would constitute a class B fire?
    a. Wood
    b. Electrical
    c. Combustible metal
    d. Flammable liquid
A

d. Flammable liquid

88
Q
  1. The heating boiler is being used to heat the house and domestic water as well. The hot water pipe from the coil in the burner would have a:
    a. Mixing valve installed
    b. Gate valve installed
    c. Zone valve installed
    d. Globe valve installed
A

c. Zone valve installed

89
Q
  1. What is an activated carbon filter used for:
    a. Iron removal
    b. Acid removal
    c. Water softening
    d. Taste and odour removal
A

d. Taste and odour removal

90
Q
  1. The operation of diaphragm and piston type flush valve is governed by:
    a. The location of the inlet orifice
    b. The length of the relief valve stem
    c. the difference in pressure between the two chambers
    d. total force
A

c. the difference in pressure between the two chambers

91
Q
  1. How many BTUs are required to raise 6 pounds of ice from 14°F to water at 70°F?
    a. 336 BTUs
    b. 946 BTUs
    c. 1146 BTUs
    d. 6776 BTUs
A

c. 1146 BTUs

92
Q
  1. When one cubic foot of water turns into steam, the volume occupied by the steam will be approximately:
    a. 1728 ft.³
    b. 970 ft.³
    c. 720 ft.³
    d. 144 ft.³
A

d. 144 ft.³

93
Q
  1. If a reservoir is located 240 feet above the mains in a town, how much pressure would exist in the mains?
    a. 554 psi
    b. 340 psi
    c. 104 psi
    d. 89 psi
A

c. 104 psi

94
Q
  1. A customer complains of noise and vibration whenever the hot water faucet is turned on. The probable cause is:
    a. The water is too hot
    b. There’s air trapped in the line
    c. Fossett washer is loose
    d. The water pressure is too high
A

d. The water pressure is too high

95
Q
  1. The maximum allowable cumulative change of direction for a fixture other than one that operates by siphonic action shall not be greater than:
    a. 45°
    b. 90°
    c. 100°
    d. 135°
A

d. 135°

96
Q
  1. Vacuum relief valve is used to
    a. Prevent a cross connection
    b. To prevent backflow
    c. Relieve a negative pressure in the HWT
    d. All of the above
A

c. Relieve a negative pressure in the HWT

666 IP (31 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions