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Contractors License Trade Test > Test #4 > Flashcards

Test #4 Flashcards

1
Q

The purpose of a vent in a plumbing system is to:

A: allow fixtures to flow properly
B: prevent sewer gas from entering the interior of the structure
C: allow air to enter the structure
D: both A and B

A

D
Vents serve three purposes; to prevent trap siphonage so sewer gas does not enter; to equalize the air pressure in the drainage system, which allows fixtures to drain properly; snd to provide fresh air in the system to help prevent corrosion of the pipe system. As the question is presently worded. “D” is the best answer. However, the State’s question may be worded differently and you may be asked to split hairs and choose between answers that are all technically correct. If you are forced to choose only one, “B” is the most important.

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2
Q

How long does it take for grout to dry?

A: 6 Hours
B: 12 Hours
C: 36 Hours
D: 72 Hours

A

D

This question refers to the grout between wythes in grouted brick masonry and not the grout found between ceramic tiles, which can set up in 5 to 20 minutes. In either case, the grout is considered completely cured in 28 days.

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3
Q

A truly vertical wall, correctly installed, is said to be:

A: upright
B: level
C: plumb
D: square

A

C

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4
Q

What is the standard depth of a closet?

A: 18 inches
B: 20 inches
C: 22 inches
D: 24 inches

A

D

Standard closet depth for residential clothes closets in 24 inches to 30 inches

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5
Q

A contractor is adding a room to a 1960 original construction, built to 1960 codes. Which of the following best reflects the permit requirements for the existing and new construction?

A: the 1960 portion of the house must be brought up to current building standards
B: the 1960 portion of the house (w/the exception of the smoke and carbon monoxide detectors) doesn’t have to be updated.
C: the permit for new construction doesn’t affect the 1960 construction
D: the 1960 portion of the house doesn’t have to be upgraded

A

B

Any additions, alterations, or repairs must comply with current codes but existing structures do not. However, when work valued at 1,000 or more is performed, smoke and carbon monoxide detecters must be installed to meet current codes.

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6
Q

Which of the following is the best place to install a heater register?

A: interior wall opposite a window
B: interior wall opposite a door
C: exterior wall under a window
D: exterior wall away from doors

A

C

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7
Q

How many square feet will be covered by one square of composition shingles?

A: 36 square
B: 48 square feet
C: 96 square feet
D: 120 square feet

A

C

One roofing square covers 100 square feet. If the State does not offer this as an answer choose the next closest answer without going over.

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8
Q

What is a disadvantage of using a China bristle brush?

A: it swells when used with latex paint
B: it swells when used with oil-based paint
C: it leaves streaks when applying a clear finish coat
D: it leaves behind bristles in the paint

A

A

A China bristle brush is made from the hair of a Chinese hog. Because it is a natural fiber brush, it needs to absorb water and should not be used with water-based paint.

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9
Q

Which of the following is the most durable wallpaper?

A: foil
B: hemp
C: burlap
D: vinyl

A

D

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10
Q

Which statement is correct concerning oily rags stored at a job site?

A: oily rags may not be stored at a job site
B: oily rags may be stored at a job site in plastic bags
C: oily rags may be stored at a job site in sealed containers
D: oily rags may be stored at a job site only overnight

A

C

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11
Q

What is the maximum length of a double-cleat ladder?

A: 12 feet
B: 24 feet
C: 36 feet
D: 48 feet

A

B

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12
Q

What is the diameter for scaffolding bracing and posts?

A: 2-1/2 inches
B: 2 inches
C: 1-1/2 inches
D: it depends on the height of the scaffolding

A

B

This is for tube and coupler scaffolds

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13
Q

The constant-contact on/off switch for a circular saw may be disabled:

A: by the contractor
B: when placing the saw blade next to the material being cut
C: by the worker
D: never

A

D

A circular saw must always have a constant-contact on/off switch without exception.

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14
Q

Before digging, drilling, or excavating at a job site, notify the Regional Underground Service Alert Notification Center:

A: at least 2 working days but not more than 7 calendar days before beginning work
B: at least 3 working days but not more than 7 calendar days before beginning work
C: at least 2 working days but not more than 14 calendar days before beginning work
D: at least 3 working days but not more than 14 calendar days before beginning work

A

C

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15
Q

You would use a voltmeter wired in _________ to test a (n)__________ circuit.

A: parallel; energized
B: parallel; non-engergized
C: series; energized
D: series; non-energized

A

A

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16
Q

If needed, which of the following must be provided by the employer during demolition?

A: hearing protection
B: safety goggles
C: hard hats
D: all of the above

A

D

Employers must provide hearing protection when the noise level is at 85 decibels or higher, eye protection (such as goggles), and head protection (such as hard hats).

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17
Q

Who must be present for all fire sprinkler tests?

A: fire chief
B: HVAC contractor
C: contractor
D: owner

A

C

The installer is responsible for running all acceptance test and forwarding the information to the proper authorities.

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18
Q

How is a vapor barrier installed on interior walls with drywall?

A: vapor barrier faces the room
B: vapor barrier faces away from the room
C: used only for ceiling
D: not used on interior walls

A

D

Vapor barrier are not needed on interior walls. But they are installed on the interior side of exterior walls.

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19
Q

What is the requirement for tree stump removal prior to construction?

A: stumps must be removed outside of the foundation
B: stumps must be removed to a depth of 12 inches
C: stump removal is not required
D: stump removal is only required for commercial buildings

A

B

All roots and stamps must be removed to a depth of at least 12 inches in the area that is to be occupied by the building.

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20
Q

What is the most likely cause if alligator cracks in paint?

A: too thin a coat
B: too few coats
C: painting over a wet base coat
D: painting an unprimed surface

A

C

Other causes include applying hard finish coats over soft priming coats, applying too many coats, having too much oil in the paint, or having incompatible pigments or vehicles in the paint.

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21
Q

What is the standard width of a garage door?

A
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22
Q

What is a standard width of a garage door?

A: 8 feet
B: 8-1/2 feet
C: 9 feet
D: 9-1/2 feet

A

C

The size of a standard single door is 9 feet wide and 6-1/2 feet or 7 feet high. Double doors are usually 16 feet wide.

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23
Q

When insulation is installed on exterior walls of a house, the foil side should be faced:

A: the interior of the walls
B: the exterior of the walls
C: there should be foil on both sides
D: faced insulation shouldn’t be used in walls

A

A

The foil side should face the living space.

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24
Q

When replacing a hardwood floor, the first thing you should do is:

A: inspect the existing floor
B: put building paper down
C: put plywood down
D: reinforce the joints

A

A

The existing subfloor should be inspected for raised nails and loose boards needing nailing and warped boards needing to be replaced. Asphalt felt or building paper should be put down next. Plywood is not necessarily needed.

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25
Q

When installing gas lines in the crawl space of a house, what should you use when tapping into an existing gas lines?

A: junction
B: all-threaded coupling
C: union
D: ground joint union

A

D

General joint unions are used to make new connections to threaded gas piping systems.

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26
Q

What is the minimum height of a railing on a scaffold?

A: 36 inches
B: 40 inches
C: 42 inches
D: 48 inches

A

C

The rail on a scaffold should be between 42 inches and 45 inches above the platform.

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27
Q

When of the following rooms must meet certain lighting requirements?

A: kitchen
B: bathroom
C: kitchen and bathroom
D: none of the above

A

C

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28
Q

Which type of material would not be installed on a 2/12 pitch roof?

A: shingles
B: torch down
C: hot mop
D: roll roofing

A

A

Shingles should not be used on roofs 2/12 or less.

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29
Q

What is the maximum distance an anchor bolt can be from the edge of the footing?

A: 4 inches
B: 6 inches
C: 8 inches
D: 12 inches

A

D

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30
Q

What is the minimum requirement for natural light in a room?

A: 5%
B: 8%
C: 15%
D: 20%

A

B

All habitable rooms with more than 10 square feet of floor area must have a window with an area at least 8% of the floor area of the room.

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31
Q

What is the minimum clearance in an attic crawl space?

A: 18 inches
B: 24 inches
C: 28 inches
D: 30 inches

A

D

This is the minimum unobstructed headroom required.

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32
Q

Where may you use BX cable?

A: outdoor areas
B: indoor dry areas
C: wet areas
D: none of the above

A

B

BX cable is armored cable that can be embedded in the plaster finish on brick or other masonry and run or fished through air voids of masonry block or tile walls, provided that the areas exposed or subject to excessive moisture or dampness.

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33
Q

What is the minimum insulation required for a water heater?

A: R12
B: R15
C: R18
D: R21

A

A

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34
Q

Where should you put a vapor barrier in relation to a concrete slab?

A: under the slab
B: on top of the slab
C: around the edges of the slab
D: embedded in the slab

A

A

35
Q

Which of the following is the least important when using a chainsaw?

A: goggles
B: ear plugs
C: knee cups
D: hard hat

A

C

36
Q

Asbestos is most dangerous when:

A: friable
B: encapsulated
C: forming
D: encased

A

A

Asbestos is most dangerous when it can be inhaled or ingested. When asbestos is friable it is easily crumbled into powder and made airborne.

37
Q

What is the minimum required width of a residential shower door?

A: 22 inches
B: 24 inches
C: 28 inches
D: 30 inches

A

A

38
Q

High-Frequency vibration used to compact freshly poured concrete results in:

A: higher lateral pressures
B: faster curing time
C: lower lateral pressures
D: slower curing time

A

A

39
Q

What is the volume of a cylinder with a diameter of 2 feet and a length of 4 feet?

A: 8.00 cubic feet
B: 12.56 cubic feet
C: 25.12 cubic feet
D: 50.24 cubic feet

A

B

To find the volume of a cylinder multiply the surface area of the end of the cylinder by the length of the cylinder. Area of a circle = pir2 where r = d divide 2.

In this problem r = 1.
Area = 3.14 x (1 foot)2 = 3.14 square feet.
Volume = 3.14 square feet x 4 feet = 12.56 cubic feet.

40
Q

The proper technique for lifting heavy loads is to:

A: bend knees and keep back straight
B: bend back and keep knees straight
C: bend knees as well as the back
D: let someone else do it

A

A

41
Q

What is the length of the hypotenuse of a right triangle where both sides are 4 feet long?

A: 4.00 feet
B: 5.66 feet
C: 6.50 feet
D: 7.33 feet

A

B

Use the Pythagorean Theorem:

(4 feet)2 + (4 feet)2 = C2

** More in book

42
Q

How high should a chimney extend above a roof?

A: 1 foot
B: 2 feet
C: 3 feet
D: 4 feet

A

C

The tip pf the flue lining must extend at least 3 feet above the point where it passes through the roof, and must be at least 2 feet above the ridge or any raised part of a roof within 10 feet of the chimney.

43
Q

How many cubic yards of cement are required for a circle 4 inches thick with a diameter of 10 feet?

A: 1/10 cubic yard
B: 1/5 cubic yard
C: 1/2 cubic yard
D: 1 cubic yard

A

D

Area of a circle = pi2 where PI - 3.14 and r = 1/2 diameter.

Area = 3.14 x (5 feet)2 = 78.5 square feet.

4 inches divided 1by 12 inches/foot = 0.33 feet

Volume = 78.5 square feet x 0.33 feet = 25.91 cubic feet.

25.91 cubic feet divided by 27 cubic feet/cubic yard = 0.96 cubic yards.

44
Q

What is the standard depth of a base cabinet?

A: 18 inches
B: 20 inches
C: 24 inches
D: 32 inches

A

C

45
Q

What is the minimum fine for illegally removing asbestos?

A: $100
B: $1,000
C: $3,000
D: $25,000

A

B

The fine is $1,000 to $3,000 for the first offense and $3,000 to $5,000 for subsequent offenses.

46
Q

What is the standard height of kitchen cabinets?

A: 32 inches
B: 34 inches
C: 36 inches
D: 38 inches

A

C

The Architectural Woodwork Institute (AWI) industry practice is to measure base cabinet height from the finished floor to the top of the countertop deck.

47
Q

What is the minimum lap for opposing joints?

A: 3 inches
B: 12 inches
C: 18 inches
D: 24 inches

A

A

48
Q

What are you required to do to discourage sexual harassment at the workplace?

A: hire only one sex
B: post signs
C: have employees sign papers
D: hold weekly meetings

A

B

49
Q

What is the allowable live load for a flat roof that is less than 200 square feet?

A: 12 psf
B: 16 psf
C: 20 psf
D: 24 psf

A

C

50
Q

LPG stands for:

A: light petroleum gas
B: liquid petroleum gas
C: laminated parallel guide
D: lighted parallel guide

A

B

51
Q

Which of the following is most dangerous about LP gas?

A: it attacks the nervous system
B: is has no taste or color
C: it accumulates near the ceiling and can ignite
D: it accumulates near the floor and can explode

A

D

Liquid petroleum gas (LPG) is any mixture of primarily propane, propylene, butane, or butylenes. LPG is heavier than air and will sink. An undetected leak can be quite dangerous because the escaping gas will accumulate in layers at the floor level. An explosion can result if the gas reaches the level of a pilot flame or encounters a spark.

52
Q

Title 24 includes:

A: Energy Code
B: Building Code
C: Plumbing Code
D: all of the above

A

D

53
Q

Which of the following is the smallest wire gage?

A: 00
B: 0
C: 1
D: 3

A

D

The larger the American Wire Gage number, the smaller the wire diameter.

54
Q

If a contract has been signed, when must a contractor start work?

A: within 10 days
B: within 15 days
C: within 20 days
D: within 30 days

A

C

55
Q

An “R-value” is a measure of a material’s resistance to the flow of:

A: electricity
B: moisture
C: cold
d: heat

A

D

56
Q

According to the California Residential Code, what is the minimum height of a kitchen ceiling?

A: 7 feet
B: 7 feet-6 inches
C: 8 feet
D: 8 feet-6 inches

A

A

According to the California Residential Code, habitable space, hallways, and portions of basements containing these spaces must have a ceiling height of at least 7 feet. Bathrooms, toilet rooms, and laundry rooms must have a ceiling height of at least 6 feet 8 inches.

57
Q

According to the California Residential Code, what is the minimum height of a bedroom ceiling?

A: 7 feet
B: 7 feet-6 inches
C: 8 feet
D: 8 feet-6 inches

A

A

According to the Residential Code, habitable spaces, hallways , and portions of basements containing these spaces (other than bathroom, toilet rooms, and laundry rooms) must have a ceiling height of at least 7 feet.

58
Q

How many cubic yards of cement are required for a 4 inches thick with a circumference of 10 feet?

A: 1/10 cubic yard
B: 1/55 cubic yard
C: 1/2 cubic yard
D: 1 cubic yard

A

A

59
Q

Which of the following is most important when using a chainsaw?

A: hat
B: gloves
C: earplugs
D: knee pads

A

C

You should always wear eye protection and head protection when working in areas with flying or failing objects, but earplugs are necessary for chainsaws to protect against excessive noise.

60
Q

What is the minimum permitted distance between convenience outlets?

A: 6 feet
B: 8 feet
C: 10 feet
D: 12 feet

A

D

A convenience electrical outlet is required for any wall space that is more than 2 feet in width, and no point along on the wall may be more than 6 feet from outlet. The midpoint between outlets spaced 12 feet apart will be 6 feet from either outlet.

61
Q

What is the minimum size nail used to attach 1/2 inch gypsum wallboard?

A: 3d
B: 5d
C: 6d
D: 10d

A

B

62
Q

What is typically installed under the frame of the door?

A: sill
B: threshold
C: flashing
D: weatherstripping

A

C

The sill is the bottom part of the door frame, and the threshold sits on top of the sill. Most construction requires flashing under door and window sills.

63
Q

The phrase “dropping a stringer” means:

A: to balance stairs
B: to allow for the thickness of the first tread
C: to snap a chalk line from the stair stringer
D: to dangle a plumb line when laying out the stringer

A

B

It also allows for the thickness of the finished flooring

64
Q

In determining the size of rafters, what are the factors that must be considered?

A: span, spacing, live load, dead load
B: type of sheathing, span, spacing
C: span, length type of material
D: span, live load, type of Sheathing

A

A

Length of the rafters may also be a factor. The type of sheathing or other material is not specific enough to determine the size of rafters.

65
Q

In a house with a passive solar system, the windows should face:

A: north
B: east
C: west
D: south

A

D

66
Q

Non-metallic sheathed cable must be supported every:

A: 3 feet
B: 4 feet
C: 4-1/2 feet
D: 6 feet

A

C

Non-metallic sheathed cable is also known as “Romex” and should also be supported within 12 inches of every cabinet, box, or fitting.

67
Q

If you have all of your workers in a building, with one crew sanding down a wall to be painted, what should you do with your other workers?

A: put up plastic sheeting
B: give them masks
C: give them breathing instructions
D: nothing

A

B

68
Q

Which of the following is not acceptable when making electrical connections?

A: wire nut
B: split bolt
C: compression fitting
D: twist wires and wrap and electrical tape

A

D

Wire nuts are used when splicing small size wires, usually #14 to #10. Split bolt connectors are used for large numbers of wires, or if the size of wires is too large for the available wire nuts. Compression connectors are used for No. 8 AWG through 1000 mem. The wire is inserted into the end of the connector, then crimped with a special compression tool. A pigtail is a short wire linking two or more circuit wires to a terminal. The wires and the pigtail are joined with a connector and the other end of the pigtail is connected to the terminal.

69
Q

For which of the following is a DOSH permit required?

A: an excavation 5 feet or deeper that workers must enter
B: scaffolding that is 2 stories high
C: roofing operations 1 story above grade
D: ladder jack scaffolds over 7-1/2 feet high

A

A

DOSH permits are also required for constructing and demolishing buildings, structures, scaffolding, or falsework more than 3 stories in height; erecting, climbing, and dismantling tower cranes; operating diesel engines in tunnels; and in some cases operating air compressors or tower cranes.

70
Q

When placing a ladder, the distance from the wall to the foot of the ladder should be equal to ________ of the distance from the ground to the top support?

A: 1/10
B: 1/5
C: 1/4
D: 1/3

A

C

71
Q

What is an HD5 used for in residential construction?

A: a holdown in wall framing
B: a shim in door framing
C: a hanger in ceiling framing
D: a spray lubricant

A

A

Holdowns are used to transfer tension loads and keep framing in place during events such as earthquakes.

72
Q

The rough opening around a door should be:

A: 2 inches all the way around
B: 2 inches side to side and 1 inch in height
C: 2 inches side to side, 2 inches in height + height of finished floor
D: 1 inch side to side and 2 inches in height

A

C

73
Q

Which of the following is most critical when mixing concrete?

A: water-to-cement ratio
B: water-to-sand ratio
C: water-to-gravel ratio
D: sand-to-gravel ratio

A

A

Too much water will weaken the concrete, and too little water will make the concrete too stiff to be worked easily.

74
Q

What is the minimum depth for a one-story foundation?

A: 8 inches
B: 12 inches
C: 18 inches
D: 24 inches

A

B

75
Q

How many nails are used on a standard three-tab shingle?

A: 2
B: 3
C: 4
D: 6

A

C

There should be one nail at each end and above each of the cutouts.

76
Q

How many roofing squares are required for a 50 foot x 100 foot flat roof?

A: 5 squares
B: 10 squares
C: 50 squares
D: 100 squares

A

C

50 feet x 100 feet = 5,000 square feet.

5,000 square feet (divided by) 100 square feet/squares = 50 squares

77
Q

How many board feet are in. A 6 inch D x 8 inch W x 12 foot L beam?

A: 48 bf
B: 72 bf
C: 144 bf
D: 576 bf

A

A board one inch thick, 12 inches wide, and one foot long = one board foot. The standard formula used in figuring board feet is (thickness in inches x width in inches x length in feet) (divide by) 12.

(6 inches x 8 inches x 12 feet) divided by 12 = 576 divided by 12 = 48 bf

78
Q

What is the total price for 12 2 inch x 4 inch x 20 foot boards at 50 cents pre board foot?

A: $600
B: $800
C: $1,600
D: $3,200

A

B

It is common practice to calculate the board feet of a piece of lumber using the nominal dimensions.

(2 x 4 x 20) divided by 12 =

160 divided by 12 = 13.34 board feet

13.34 bf x 120 = 1,600.8 bf

1,600.8 bf x $0.50/bf = $800.40

79
Q

A second guide for ladder placement is to locate the ladder at a minimum ________ angle from the floor to the ladder.

A: 60 degrees
B: 65 degrees
C: 70 degrees
D: 75.5 degrees

A

D

80
Q

What is the maximum length of a 2-inch trap arm?

A: 3-1/2 feet
B: 5 feet
C: 6 feet
D: 10 feet

A

B

The minimum length of a trap arm may not be less than twice the diameter.

81
Q

Handrails must be:

A: at least 2 inches from the wall
B: 1-1/2 inches in diameter
C: round or oval
D: not more than 38 inches above the tread nosing

A

D

Handrails must be between 34 inches and 38 inches above landing and the nosing of threads. They also must extend at least 12 inches beyond the top and bottom risers. The handgrip must have a smooth surface with no sharp corners but is not required to be round or oval.

82
Q

How much rebar is required for the wall below if it is 46 feet long and the overlap is 12 inches?

A: 48 feet
B: 92 feet
C: 96 feet
D: 108 feet

A

C

Rebar is generally supplied in 20 foot increments, so a 46 foot wall would need at 3 pieces to span the length.

46 feet + 2 feet (for the two overlapping areas) = 48 feet. The drawing shows two rods, so 48 feet x 2 = 96 feet.

83
Q

What is the minimum height for a kickplate on a door?

A: 6 inches
B: 10 inches
C: 12 inches
D: 18 inches

A

B

The bottom 10 inches of a door must be smooth so that the footrest of a wheelchair can easily bump it open without becoming trapped.

84
Q

What is the minimum number of dedicated circuits required for a residential kitchen?

A: one 15-amp circuit
B: one 2–amp circuit
C: two 20-amp circuits
D: three 15-amp circuits

A

C

The countertop receptacles in kitchens must be supplied by no fewer than two 20-amp small appliance branch circuits. These circuits may also supply receptacles in the pantry, dining room, and breakfast room, as well as the electrical loads associated with gas-fired appliances, but no other outlets on those circuits are allowed. The refrigerator may be on an individual 15-amp or larger circuit or it may be included in the 20-amp small appliance branch circuit.

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