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5th Sixth > 106 > Flashcards

106 Flashcards

1
Q

A liquid has a __ shape and a ___ volume

A

Changeable; fixed

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2
Q

Kilograms per cubic meter is the unit of measurement for

A

density

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3
Q

the temperature of a liquid decreases as it

A

evaporates

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4
Q

During laminar flow the fluid in a pipe

A

moves in parallel layers

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5
Q

the solubility of a gas in a liquid is usually ___ at the liquids boiling point

A

lowest

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6
Q

plastics that can be reheated and reshaped many times are called

A

thermoplastics

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7
Q

what method of molding produces intricate parts at high speed and low costs

A

injection molding

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8
Q

in filament winding glass fiber is wound around a form called

A

mandrel

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9
Q

when drilling most plastics you should reduce the feed rate just before the drill point ___ the work

A

penetrates the far side of

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10
Q

when preparing an area of corroded surface to be patched, which side of the material should be cleaned

A

both sides

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11
Q

if stretched to twice its normal length and released an elastomer will

A

return to its original shape

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12
Q

class T rubber compounds resist damage from

A

extreme temperatures

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13
Q

most rubber compounds are

A

flammable

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14
Q

in vulcanization the more sulfur that is added the __ the rubber becomes

A

harder

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15
Q

what characteristic is most important in the rubber coating of wire in extension cords

A

flexibility

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16
Q

cutting a log lengthwise through or near its centerline produces a ___ cut

A

radial

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17
Q

the actual length of a board is stated in __ feet. Lumber is sold in ___ feet

A

Running; board

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18
Q

the best veneer in softwood plywood is graded

A

N

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19
Q

wood with many knots should not be used for structural support because it is

A

weak

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20
Q

how deep should the pilot hole for a screw be drilled in softwood

A

half the screw length

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21
Q

air entrained concrete is commonly used for

A

structures exposed to severe cold

22
Q

cinder block is commonly used for contsruction

A

above ground

23
Q

type n mortar is a ___ strength mortar used for ___ bearing clay tile contsruction

A

Medium; load

24
Q

which type of plaster sets very quickly and should be used only for small patching jobs

A

plaster of paris

25
Q

the correct size of the pane of glass for this window is

A

23 7/8 in x 26 7/8

26
Q

convection heat is the

A

transfer of heat by fluids

27
Q

what type of insulation can withstand both high and low temperatures is chemically inert and may be used in ovens and freezers

A

mineral wood

28
Q

you can use lead sheet or plastic film for

A

reducing vibration of pipes or ducts

29
Q

an asphalt coating serves as an ___ on the outside of underground walls

A

moisture barrier

30
Q

which of the following materials has the highest dielectric strength

A

mica

31
Q

the part of a paint that binds solid particles into a uniform film is called the

A

vehicle

32
Q

the single most important factor for success in painting a structure is

A

surface preparation

33
Q

in sandblasting the intensity that produces the best anchor pattern for paint is called __ blasting

A

white

34
Q

the color specified ANSI to indicate first aid stations and safety equipment in a plant is

A

green

35
Q

the process of melting zinc with an oxyacetylene flame and spraying it onto a metal surface for protection is called

A

metalizing

36
Q

what pH value below indicates an acid solution

A

5

37
Q

the solvent ___ should not be used for cleaning because it is highly flammable and irritates the skin

A

gasoline

38
Q

you should use ___ acid to dissolve hard water deposits in heating and cooling systems

A

sulfamic

39
Q

chemicals used to prevent the formation of scale in piping systems and boilers are called

A

sequestrants

40
Q

fires involving electrical equipment and wiring are designated

A

class C

41
Q

the completion of all chemical and physical reactions that affect adhesive bonding is called

A

curing

42
Q

an adhesive made of water soluble gums and starches is called

A

mucilage

43
Q

the strongest adhesive joint is the __ joint

A

bevel lap

44
Q

good electrical insulation is provided by __ tape

A

rubber

45
Q

tapes coated with fluorocarbon adhesives are used where service conditions include

A

high temperatures

46
Q

activated carbon is widely used for

A

absorbing impurities

47
Q

at room temperature carbon is chemically

A

inert

48
Q

excessive noise in electric hand tools often indicates

A

carbon brush problems

49
Q

nonporous carbon seals are used in applications where

A

even a tiny leak would be harmful

50
Q

in shaft seals that have two individuals packing rings the joints should be positioned ___ apart

A

180 degrees

5th Sixth (8 decks)

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