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LA Contractors License > Industrial Piping > Flashcards

Industrial Piping Flashcards

1
Q

Transit pipe is also known as

A

Asbestos cement

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2
Q

Insulation must be used on surfaces within normal reach a building occupants at which of the following temperatures?

A

140°

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3
Q

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

A

1/4 points on one end

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4
Q

In new liquid pipeline construction for hazardous materials, the manufacturers specifications must be marked on the wall of the pipe which is at least ____ in diameter or larger

A

4”

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5
Q

To ensure proper compaction around piping, trenches shall be backfilled with clean earth in thin layers to at least ____ inches above the top of the pipe thereafter deeper layers are permitted

A

12

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6
Q

When liquid transportation pipelines that convey hazardous substances are installed underground in an industrial area, the distance from the top of the pipe to the ground level must be a minimum of ________ inches for normal excavation

A

18

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7
Q

What material must not be used in low pressure steam and hot water piping?

A

Aluminum

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8
Q

Which is not an approved material for use in a natural gas piping system?

A

Copper

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9
Q

What is the minimum airgap required when potible water is discharged into the drainage system?

A

2 pipe diameters not less than 1”

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10
Q

When it is impractical to test 100% of the days girth welds made on a liquid transportation pipeline for hazardous substances, no less than _____ shall be non destructively tested if the pipe is run within a railroads right of way

A

90%

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11
Q

Each valve installed in a liquid pipeline system for hazardous substances must be ____________ tested?

A

Nondestructively

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12
Q

Low pressure steam heating valves up through two inches in size must have bodies of steel, malleable iron, or?

A

Brass

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13
Q

Plastic pipe used to convey gas can be placed how deep underwater?

A

200’

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14
Q

Any below ground structure used in a propane transmission system must have?

A

Forced ventilation provided that prevents accumulation

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16
Q

When preparing pipe for welding, the bevel angle is approximately ______ from level

A

30°

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17
Q

Excluding exceptions, under what conditions may nonmetallic conduit not approved for direct burial be used for an underground 12.5KV insulation.

A

Non metallic conduit not approved for direct burial

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19
Q

For a T-weld or fillet weld that will not distort parent metal should?

A

Use a chill ring

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20
Q

Each valve other than a check valve in a liquid pipeline for hazardous substances must be equipped with?

A

An indicator which clearly indicates when the valve is open or closed

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23
Q

Zinc coating (galvanizing) on metallic fuel gas piping installed below ground

A

Is NOT adequate protection against corrosion

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24
Q

Joints in black wrought iron steam or hot water piping which are embedded in concrete shall be?

A

Welded

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25
Q

Which is not required to be marked on new 8 inch diameter pipes that will be used to convey hazardous substances?

A

The stress level of the pipe

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26
Q

Process piping shall withstand the required pressure test for a period of no less than ________ minutes after all piping is installed

A

10

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27
Q

When a natural gas transmission pipeline is installed underground, it may not be installed closer than ______ inches to any other pipeline or structure

A

12”

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27
Q

Each transmission line must have secondary block valves installed at each point on a pipe line within ____ miles of transmission line valve in a class III location

A

4

28
Q

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

A

Must be sealed with mechanical leak clamps

30
Q

Pressure relief valves on water distribution lines shall be set to limit the maximum pressure to no more than _____ PSI

A

100

31
Q

What percentage of the welding procedures used during welding qualification test must be recorded?

A

100%

33
Q

Each gas main that will be operated at pressure above 1 P.S.I.G. shall be tested at a pressure of ________P.S.I.G.

A

90

33
Q

Which of the following is not an advantage of hydraulic shoring over the use of screw jacks?

A

The pump cylinders are all activated at the same time

34
Q

On Corporation stop, where does stop come off the mainline of the sewer?

A

2-10 o’clock

36
Q

When connecting J-M big blue pvc pipe to mechanical joint or flanged fitting, it is recommended to?

A

Use a blunt end of the pvc pipe

37
Q

When laying slip ring pipe it is necessary to

A

lubricate the spigot end before connecting together

38
Q

An orifice meter is in line and begins to pulsate. You should __________?

A

Move the meter

39
Q

A cathodic protection system must be installed no later than _______ after construction is completed for liquid transportation pipeline that will convey hazardous substances

A

1 year

40
Q

When taping J-M Big Blue water pipe, what is the maximum outlet size recommended with service clamps or saddles?

A

2

41
Q

The marking on a pipe is ABC API 14.00 49.93 AS. Identify 49.93.

A

Weight per linear foot

42
Q

The grade stake who’s top indicates a reference grade is called a

A

Hub

44
Q

The orifice meter measures?

A

Volume

44
Q

If a pipe is stamped MEE this would mean?

A

Pipe is milled on each end

44
Q

When tunneling is permitted for outdoor piping, there should be at least _____ feet of clear height above the pipe

A

2

45
Q

Underground vaults used as a pressure reducing station must be ventilated if the internal volume of the vault exceeds?

A

200

46
Q

When installing used pipe in a liquid transportation pipeline for a hazardous substance, what percent of the old girth welds must be given a nondestructive test?

A

100%

47
Q

Where local water pressure exceeds _____ PSI, a pressure regulator shall be installed to reduce the pressure to an allowable limit

A

80

48
Q

The grade stake whose top indicates a finished grade is called

A

Blue top

49
Q

The class 1 location for a natural gas pipeline is a location that has?

A

10 or less building intended for human occupancy

49
Q

The joint compound approved for use in a fuel gas piping must be applied to the ______ and must be _______ in fuel gas

A

Male thread only and insoluble

50
Q

To clean stainless with a mixture of nitrogen prior to installation is called?

A

Pickle

50
Q

Which soil compaction test uses a test rod in a 1/2” hole 12” deep?

A

Nuclear

54
Q

All pipes entering into a vault must be steel for any pipe that is ______ inches or less in diameter

A

10

54
Q

A backflow prevention device for a boiler shall be installed at least

A

12” above the surrounding ground

54
Q

What is used to clean out a pipeline?

A

Pig

55
Q

When installing J-M big blue pvc water pipe, the manufacturers recommend thrust blocking at all of the following locations except?

A

At joints where different types of pipe are connected

55
Q

Before using rolling equipment over the top of J-M big blue water pipe, a minimum of ______ inches of backfill material should be placed over the top of the pipe?

A

18

56
Q

Which of the following taps may be made into 4 inch cast-iron pipe without reinforcement?

A

1 1/4”

57
Q

Compaction with water from a hose works best in?

A

Granular BF in granular soil

58
Q

The first weld pass on a pipe weld is called

A

Root pass

58
Q

According to the code of federal regulations “nominal wall thickness” means?

A

Wall thickness listed in the pipe specifications

59
Q

Which is the most heat resistant piping?

A

Wrought iron

59
Q

A relief valve is usually used with?

A

Ball valve

LA Contractors License (6 decks)

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