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LA Contractors License > Municipal & Public Works > Flashcards

Municipal & Public Works Flashcards

1
Q

Concrete curing procedures and curing compounds should be applied:

A

After final finishing as soon as the concrete surface is dry

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2
Q

Underground conductors for communication circuits entering a manhole that also contains light and power conductors:

A

Must be separated from the light and power conductors by a brick tile or concrete partition

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3
Q

Overhead data communications conductors are to be run between two buildings parallel to and below electrical power conductors. What minimum separation must be maintained between the two sets of conductors?

A

12”

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4
Q

A typical traffic weight manhole cover is how many inches in diameter?

A

12”

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5
Q

Where practical, a separation of at least how many feet shall be maintained between communications wires and cables on buildings and lightning conductors?

A

6 feet

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6
Q

What must a worker in the bottom of a bell hole be supplied with?

A

A lifeline and safety lanyard

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7
Q

What is the percentage of cement in concrete?

A

7-15%

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8
Q

What causes lung problems when sandblasting?

A

Crystalline silica

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9
Q

If workers must pass under scaffolding what should be done prior to use?

A

Provide a screen between the toeboard and the guard rail, extending along the entire opening, consisting of number 18 gauge

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10
Q

What is the best cleaning for a metal surface?

A

White blast

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11
Q

If too much cut back asphalt is applied, what shall be done to prevent bleeding of the prime coat up through the asphalt concrete?

A

Blot the excess coat with sand.

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12
Q

What do you do with rebar that sticks out horizontally from a wall for a future pour?

A

Cap the end to prevent impalement

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13
Q

What is the proper barrier fence for an open hole?

A

42” with a mid-rail

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14
Q

What is the schedule number used for carbon steel pipe 14” - 24”?

A

10-180

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15
Q

What is used in a drinking water plant to trap solids?

A

Sand

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16
Q

A benchmark is at an elevation of 35.11, cut invert is 17.35 height of the instrument is 4.07. What is the elevation of the invert?

A

21.83

35.11 + 4.07 +- 17.35 = 21.83
BM + Back Site - Front Site

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17
Q

If you are installing a socket and spigot tee, you should cut the line ________

A

A little shorter than the tee

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18
Q

When leveling equipment, it should be bolted and shimmed with what?

A

Metal shins

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19
Q

If hazardous atmospheres could reasonably be expected to exist, atmospheres shall be tested at how many feet?

A

4’

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20
Q

Class 4 lines shall be tested to how many times the Maximum Operating Pressure?

A

1.5

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21
Q

The junction box for underground electrical in a tier 5 location would be used for what?

A

A sidewalk with occasional non-deliberate vehicular traffic

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22
Q

According to OSHA, if a trench is unstable soil, the sides shall be sloped, shores, or braced if the trench is how many feet deep or more?

A

5

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23
Q

OSHA regulations state that if the permit for a confined space is canceled, the record must be retained for how many years?

A

1 year

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24
Q

What is true about a mechanical pipe joint?

A

The gasket should go on the socket end

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25
Q

Blowoff valves are placed where?

A

On the low elevations or at dead ends of the system

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26
Q

If employees are working in a building that has been damaged by fire, OSHA requires?

A

Walls or floors to be shored or braced

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27
Q

A jeep tests for holidays in pipeline coatings using?

A

Electrical charge

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28
Q

A tripod is being used for a rescue system for a confined space, however this system does not have a built in speed control. This will also require what?

A

A trained rescue team on site

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29
Q

A small length of steel Water main has been damaged. The piece will be cut out and replaced, what would be the best to use?

A

MJ Sleeve

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30
Q

What is the most stable bedding for underground telecommunications and electrical cable?

A

Sand

31
Q

What is used to avoid electrolysis between copper and other metals?

A

Dialectic union

32
Q

Overhead regulatory highway signs are placed a minimum of how many feet above the roadway?

A

17’

33
Q

What method of connecting a control valve box that will allow easy removal for maintenance?

A

Bolted gasketed connection

34
Q

What type of valve can be opened or closed quickly by lowering or raising a sliding stem?

A

Gate valve

35
Q

What would be used to keep copper from corroding when attached to a different metal?

A

Dielectic Union

36
Q

Water main piping is laid at what grade?

A

Even grade

37
Q

Which fire extinguisher is rated to handle wood, metal, or electrical fires?

A

Dry chemical

38
Q

When the nominal wall thickness of a pipe is not known, the pipe is measured at

A

1/4 points on one end

39
Q

When using cast iron pipe in the construction of a natural gas transportation line, each caulked bell and spigot joint

A

Must be sealed with mechanical leak clamps

40
Q

No welder may weld using a specific welding process unless the welder has been using that specific process within the last proceeding how many months?

A

6

41
Q

With concrete that contains an accelerant, when would curing compound be added?

A

While concrete is slightly dark

42
Q

A 1500 CY excavation needs to be filled. The material to be used has a 25% shrinkage factor. How many cubic yards will be needed?

A

2000

1500/.75

43
Q

When pouring a concrete wall using plywood forms, when would you remove the cone nut?

A

After removing the sheathing

44
Q

Spacers used for PVC underground electrical conduit power duct banks are made of?

A

Plastic

45
Q

Who establishes the weight of large equipment?

A

Manufacturer

46
Q

What test for welds would be used on a gas piping system?

A

Radiographic

47
Q

What is used to disinfect a new ductile iron water main?

A

Chlorine then flush

48
Q

When using LA One Call they will mark sewer gas and water lines from the edge of the property to

A

The construction stopping point

49
Q

What test is used for leak testing concrete pipe and manholes?

A

Hydrostatic

50
Q

A well point system is least effective in?

A

Clay

51
Q

What would be attached to the boom of a track hoe to demolish concrete?

A

Hydraulic breaker

52
Q

A valve box for a water distribution line would be found where?

A

In a larger above ground box

53
Q

What type of lubricant would be used on a gasketed pipe that will contain potable water?

A

AWWA/ANSI standard 60

54
Q

According to OSHA a crane operator certificate is valid for how long?

A

5 years

55
Q

At the beginning intake of a waste water treatment plant, what would be used to remove all large and floating debris?

A

Bar screen

56
Q

A Ph reading of 3.1 is considered

A

Acidic

57
Q

What type of fire extinguisher is approved for burning metals such as fire caused by welding?

A

D

58
Q

What is the minimum burial depth for a high-voltage line in IMC conduit under a parking lot?

A

24”

59
Q

What is the minimum slope for a trench with type C soil?

A

1 1/2:1

60
Q

Threaded taps in cast iron pipe without reinforcement is permitted up to a size of how many percent of the pipe diameter?

A

25%

61
Q

Most pipeline welding is done using

A

SMAW

62
Q

The standard used for pipeline weld quality is?

A

API 1104

63
Q

OSHA requires certification for operators of

A

Cranes

64
Q

Sewer and water mains that cross shall have a minimum vertical separation of how many inches?

A

18”

65
Q

When installed in parallel, sewer and water mains shall be laid not less than how many feet apart?

A

6’

66
Q

What bacteria is tested for when repairing potable water lines?

A

Coliform

67
Q

Pallets containing 15 pipes that are 8 feet long each are being delivered to the job site. The best placement of each pallet should be where?

A

The first pallet at 60 foot and then 120 foot apart

68
Q

A simple slope excavation 20 foot or less in type a soil shall have a maximum slope of

A

3/4:1

69
Q

A PH reading of ____ is neutral

A

7

70
Q

Which type of fire extinguisher is approved for an energized electrical equipment fire and flammable liquids?

A

Type BC

71
Q

Which type of valve allows flow in one direction only?

A

Check

72
Q

What are the standard dimensions of a rectangular manhole cover?

A

26” x 22”

73
Q

According to code, when water service piping is installed in the same trench as sewer piping, there must be a minimum separation of

A

12”

74
Q

A lift station is being built and boring logs sure water and sand at the invert elevation. What should be used to remove water from the excavation?

A

Well point

LA Contractors License (6 decks)

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