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dc2 course material > damage control > Flashcards

damage control Flashcards

0
Q

You can locate cutout valves by using what diagram?

A

Firemain diagram/DC plates

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1
Q

What reference is NSTM 079 Volume 2?

A

Damage control-practical damage control

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2
Q

When rigging a jumper hose to a flange, what fitting must be used?

A

A double female

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3
Q

List three piping systems that should be restored immediately if damaged?

A

ASW
Firemain
Chill water supplying vital spaces

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4
Q

Disadvantage of rigging a jumper to a fire station?

A

lose the use of two fire plugs for fire fighting

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5
Q

What should be used top hold flanges together?

A

Bolt or C clamp

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6
Q

Forward edge of the stern is the ?

A

cutwater

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7
Q

Each compartment is given an number, this number is on a plate secured to the door and on a ___X___ yellow rectangle on the bulkhead called the bulls eye.

A

11 inch x 15 inch

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8
Q

When a compartement extends through two or more decks, which number is used to show what deck it is on?

A

the lower deck

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9
Q

What letter would a compartment holding stores or stowage be?

A

A

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10
Q

Equation for a cubic foot

A

12”x12”x12”

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11
Q

One cubic yard is equal to?

A

3’x3’x3’ or 27 cubic ft

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12
Q

According to niosh, that under ideal conditions what is the maximum weight to be lifted with two hands by one person?

A

51lbs

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13
Q

An estimate of wood, screws, and a finishing product for a project would be what kind of estimate?

A

Materials

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14
Q

What type of estimate consist of a list of various types of equipment required to complete a given task?

A

Equipment

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15
Q

How many square inches are in a square foot?

A

144

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16
Q

One cubic foot is equal to?

A

12”x12”x12”

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17
Q

What are the measurements in a board foot?

A

12”x12”x1”

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18
Q

How many board feet are there in a piece of wood 2”x8”x6’?

A

8

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19
Q

What is usually the first step when planning a project?

A

Obtain or create a drawing

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20
Q

PMS manual is broken down into what six section?

A 
Maintenance schedule
Record of changes
Letter of promulgation
Unit distribution
System description
PMS procedures index
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21
Q

Each MPC is listed in the PMS procedures index and broken down into what four section?

A

Section 1- Auxiliary (A)
Section 2- Electrical (E)
Section 3- Main prop/Machinery (M)
Section 4- Damage Control (R)

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22
Q

Each MPC serial number is broken down into three components, what are they?

A

First indicates the system it belongs to.
second indicates the frequency.
Third is the numerical indexing identification number

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23
Q

How many blocks of information are there in addition to the MPC serial number?

A

10

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24
Q

How do you find the cutter PMS completion percentage?

A

Number of completed PMS (minus daily and weekly) divided by number of procedures scheduled times 100= percent complete

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25
Q

Where will Cutter PMS completion percentages be listed at?

A

Cutter engineering report

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26
Q

THE SHIPS WORK BREAK-DOWN STRUCTURE GROUPS SIMILAR NAVAL ENGINEERING EQUIPMENT INTO CATEGORIES AND ASSIGNS THOSE CATEGORIES THREE DIGIT CODES BETWEEN ___ AND ____

A

001-999

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27
Q

WHAT COMDTINST IS THE NAVAL ENGINEERING MANUAL?

A

M9000.6

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28
Q

What is FEDLOG?

A

A logistics information system that allows you to retrieve information from the Federal Logistics information system(FLIS). Contains management, part numbers and data for items in FED stock.

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29
Q

What is the MICA manual?

A

Management information for configuration and allowances.Contains detailed supply and technical information on every piece of equipment attached to a specific unit.

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30
Q

This reference provides guidance to Coast Guard personnel responsible for safe operation, maintenance, and repair of engineer equipment?

A

NEM

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31
Q

The supply module of CMPLUS allows which functions?

A

Accessing inventory information.

Create/update/track purchase request for supplies.

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32
Q

What are corrective maintenance actions used for?

A

CMA are used to record and update unscheduled maintenance repair and casualties

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33
Q

Which database system allows you to manage personnel rating information required for performing maintenance procedures?

A

CMPLUS

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34
Q

Which CMPLUS option is used to identify maintenance and unit operations due within a specific timeframe?

A

Maintenance scheduler option.

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35
Q

Maintenance history reports can be selected, sorted, and printed by which of the following selections?

A

work center, maintenance procedures, all unit maintenance and CI

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36
Q

Presence of cavities in the weld metal?

A

Porosity

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37
Q

What causes porosity in welds?

A

Gases that are trapped in the weld pool as it solidifies.

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38
Q

What four forms of porosity are there?

A

Distribution, Surface breaking pores, Wormhole, crater pipes

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39
Q

What are the main causes of porosity in a weld?

A

Air entrapment from leaks in shielding gas, dust rust oil grease moisture on base metal, excessive current or arc length, moisture in shielding gas lines

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40
Q

Spatter is caused by what?

A

long arc length, high welding current, improper electrode angles

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41
Q

Causes of a solidification crack?

A

insufficient weld bead size or shape, welding under high restraint, material properties such as high impurity content

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42
Q

Undercut can by detected by the naked eye and also using what gauge?

A

V-WAC gauge

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43
Q

Excess weld metal in a weld is called overfill, reinforcement and _____ when it protrudes beyond the weld interface at the toe of the weld.

A

Overlap

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44
Q

Test used to identify or determine the various effects of discontinuities within a weld.

A

Destructive testing

45
Q

Minor flaws in a weld are known as what?

A

discontinuities

46
Q

Information on NDT criteria can be found where?

A

MIL-STD 2035

47
Q

What are the five methods used in NDT?

A 
Visual (VT)
Magnetic particle (MT)
Liquid penetrant (PT)
Ultrasonic testing (UT)
X-Ray (RT)
48
Q

What are some of the limitations of the MT Magnetic particle inspection method?

A

Cannot be used with austenitic steels, joints may be falsely interpreted as unsound

49
Q

Ultrasonic Testing UT uses high frequency sound waves at more that _____ Megahertz MHz

A

one million

50
Q

To ensure good contact is made between the transducer and the material during UT, what must be used?

A

A couplant. can be water, oil or glycerol

51
Q

Which defect is caused by absorption of nitrogen, oxygen, and hydrogen in the molten weld pool that is released on solidification and becomes trapped in a weld metal?

A

Porosity

52
Q

Which type of weld defect is principally pieces trapped or included in the weld?

A

Slag inclusion

53
Q

What type of weld defect is the most serious type of imperfection found in a weld?

A

Solidification cracking

54
Q

Undercut welding defects can be prevented by what?

A

Reducing travel speed, welding voltage and welding current

55
Q

What could result if you touch un-insulated electrodes or holders with bare skin or wet gloves?

A

A fatal shock

56
Q

What is the purpose of having a shielding gas out of the nozzle in GMAW?

A

Keep oxygen and impurities in the air from contacting the weld.

57
Q

Which type of current is not used in GMAW?

A

AC

58
Q

What are the three methods for transferring metal across the arc in the GMAW process?

A

Globular transfer, Spray transfer, Pulsed-spray transfer

59
Q

What are the three power sources used with GMAW?

A

Transformers-rectifier, inverters, engine-driven generators

60
Q

Pressure rolls have one or two grooves cut in them and they are sized for specific wire ______.

A

Diameter

61
Q

Which shielding gas is used for GMAW and produces a weld that covers well, but has an unstable arc with a great deal of splatter?

A

Carbon dioxide

62
Q

What is another name for a proper shielding gas flow rate?

A

Laminar flow

63
Q

What type of GMAW gun is used with argon or helium above 300A or for continuous duty?

A

Water-cooled

64
Q

In GMAW, what are the two types of liners?

A

Steel coil, teflon

65
Q

Contact tubes are made from _____.

A

Copper or copper alloys

66
Q

What type of liner us used with softer materials such as aluminum?

A

Teflon

67
Q

What is increased as the electrode extension increases?

A

Resistance heating of electrode

68
Q

Which GMAW method gives the best penetration when using the flat welding position?

A

Backhand

69
Q

What protective clothing is required to prevent burns when making an out of position weld?

A 
Leathers
A)cap
B)Coat
C)Cape
D)Chaps
70
Q

How do you bleed the gas lines when shutting down the GMAW station?

A

Squeeze gun trigger for a few seconds

71
Q

At what angles are the electrode and gun held if the backhand welding procedure is used to make a flat fillet weld?

A

5-15 degrees forward of the vertical axis

72
Q

What two metal transfer methods are recommended for overhead welding?

A

Short circuiting and pulsed spray

73
Q

GMAW is done using direct current electrode positive (DCEP) also known as?

A

Direct current reverse polarity (DCRP)

74
Q

For every pound of solid electrode wire used, ___ to___ percent becomes deposited weld metal

A

92-98

75
Q

SMAW deposits ____ to____ percent of the electrode wire as weld metal

A

60-70

76
Q

Short circuit gas metal arc welding is used with high or low welding currents?

A

low

77
Q

GMAW-S uses wire sizes under what size?

A

0.045 inches

78
Q

Since short circuit gas metal arc welding has a low-heat input, it is also used to weld thick section in what positions?

A

overhead and vertical

79
Q

The droplet transfer or short circuiting process repeats itself how many times per second?

A

20-200 times per second

80
Q

Where must the welding current be set when using the globular metal transfer method?

A

slightly above the range used for short circuiting

81
Q

Spray transfer will only take place when a high percentage of ____ is used

A

argon

82
Q

How much percent argon shielding gas is used when welding nonferrous metals and alloys?

A

100%

83
Q

The transition current decreases as the electrode extends farther from the contact tube. T or F

A

True

84
Q

Spray transfer only occurs when ___ percent argon is used as shielding gas.

A

90%

85
Q

What position is spray transfer best done in and on metal of what thickness?

A

flat or horizontal and metal that is over 1/8in thick

86
Q

Pulsed spray transfer only occurs when?

A

During the peak current within the pulsed cycle

87
Q

Pertaining to pulsed spray transfer, basic welders allow the welder to select pulse frequencies of ____ to _____ pulses per second.

A

60-120

88
Q

GMAW units with wire spool contained in machine run off of what power?

A

115v or 230v AC

89
Q

What two types of penetrating liquids are there for Liquid penetrate NDT ?

A

Fluorescent and visible dye

90
Q

How long should you allow the liquid to penetrate after applying and what is this time referranced to as?

A

20 minutes, dwell time

91
Q

What type of weld inspection is often referred to as an extension of the visual inspection?

A

Liquid Penetrate Test PT

92
Q

What is the minimum lens shade number for nonferrous GMAW/MIG welding?

A

Number 11

93
Q

What is the minimum lens shade for ferrous GMAW/MIG welding?

A

Number 12

94
Q

The switch on the wire drive control panel used to rotate the drive motor slowly is called what?

A

inch switch or jog switch

95
Q

What is the term used to describe when a wire gets jammed in the wire feeder?

A

birds nest

96
Q

What are the fiver inert gases used for GMAW?

A 
Argon AR
Helium HE
Oxygen O2
Carbon dioxide CO2
Nitrogen N2
97
Q

This gas causes a squeezing of the arc, resulting in deep penetrtaion, a narrow bead and almost no spatter

A

Argon

98
Q

True or false, Helium transfers heat through the arc better than argon?

A

True

99
Q

Beads from this gas have very good contour, are wide and have deep penetration with no undercutting.

A

Carbon Dioxide

100
Q

About 7 to 12 percent of the CO2 used in GMAW becomes what hazardous gas?

A

CO Carbon Monoxide

101
Q

A mixture of Argon and Helium uses what percentages of each gas?

A

25% Argon and 75% Helium

102
Q

What are the advantages of using a argon-helium mixture?

A

Gives deeper penetration with arc stability, Reduces spatter to almost zero, produces good welds on thick nonferrrous sections

103
Q

What may cause a popping sound while mig welding?

A

Too little gas

104
Q

Gas flow rates of ____ to____ Cubic feet per hour (CFH) are acceptable for most welding application

A

20-30

105
Q

Torches used with CO2 above 600A or during continuous duty are gas or water cooled?

A

Water cooled

106
Q

What material are contact tubes on GMAW guns made of?

A

Copper or copper alloys

107
Q

GMAW nozzle exit diameters are based on a ____inch increment

A

1/16th

108
Q

Hardened steel liners are used for what of steels?

A

steel and stainless steel wires

109
Q

What can be done to remove fine particles stuck in a GMAW wire liner?

A

blow compressed air through it

110
Q

Pertaining to GMAW, square groove edges on metal up to how thick can be accomplished without edge sharping?

A

3/8th inch

dc2 course material (2 decks)

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