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2nd Sixth > 302 > Flashcards

302 Flashcards

1
Q

Thin layer of lubricant between the surfaces enable one surface to _____ the other

A

Slide over

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2
Q

By separating two surfaces slightly a lubricant helps reduce

A

Wear

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3
Q

A lubricant can equalize pressures in various places along the contacting surfaces thereby reducing

A

Mechanical shock

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4
Q

An oil cooler radiates heat into the air, usually through its

A

Metal fins

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5
Q

By forming a slight scab where it is exposed to the air, grease can

A

Seal out dirt and other contaminants

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6
Q

The compounds in crude oil are classified as

A

Hydro carbons

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7
Q

The most important property of lubricating oil is it’s

A

Viscosity

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8
Q

The viscosity of a industrial lubricating oil is measured in

A

Saybolt Universal Seconds

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9
Q

Grease is used in applications where liquid lubricant would leak out or where frequent lubrication is not

A

Possible

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10
Q

The dropping point of a grease is the same as it’s

A

Melting point

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11
Q

Antifoam agents are necessary additives for oils used in?

A

Hydraulic Systems

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12
Q

Oil additives that react with metal surfaces to form a sulfide or chloride coating are called

A

Extreme-Pressure Additive

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13
Q

Demulsifiers are useful oil additives when you need to?

A

Remove water from the oil system

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14
Q

Lubrication by means of a film consisting of impurities, oxides, and air molecules
is called lubrication

A

Boundary

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15
Q

In full- film lubrication, the moving

surfaces are

A

Completely separated from each other

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16
Q

Of the following oil blends the one that undergoes the least change in Viscosity as the temperature changes consists of ____ napthene-base oil and ____ pariffin
based oil

A

10% , 90%

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17
Q

The highest quality circulating oil is ___ oil

A

Turbine

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18
Q

One of the most important additives in hydraulic oil is a(n) ____ additive

A

Antifoam

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19
Q

Spindle oils are premium grade lubricants with a(n)

A

Low viscosity

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20
Q

Animal fat is sometimes included in ___ oil to help it stick to the surfaces being lubricated

A

Steam cylinder

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21
Q

The function of a soap in a grease Is to

A

Hold the oil

22
Q

Calcium soap grease begins to ___if the temperature rises to 180 degrees

A

Dry out

23
Q

Sodium soap greases are good ___ purpose greases for use in the ___ of water

A

General, Absence

24
Q

Lithium soap greases work well over a __ range of temperatures in the __ of water

A

Wide, Presence

25
Q

Non soap bases for greases include clay minerals, gels, and ___

A

Organic complexes

26
Q

Additives can protect a grease from changes in ___

A

Chemical makeup

27
Q

The ability of EP grease to overcome short cycle, high load conditions depends on the ___ of the ___ in the grease

A

Film strength, Oil

28
Q

The primary characteristics of Calcium soap greases is their resistance to

A

Water

29
Q

The particles of lamellar are _____ in shape

A

Thin and Flat

30
Q

In a silicone grease the lubricant is a ____ and the thickener is a _____ material

A

Synthetic polymer, soap or nonsoap

31
Q

One of the operating requirements of a lubricating device is it’s ability to

A

Regulate lubricant flow

32
Q

Drip feed oiling depends on ___ for its operation

A

Gravity

33
Q

The sump for a splash-or ring-type natural lubrication system is ____

A

Part of the machine housing

34
Q

Most pressure lubricating systems have ___ pumps

A

Gear

35
Q

Most lubrication systems are similar in operation to air line lubricators, but they handle ___ lubricant at a ____ pressure

A

More , Lower

36
Q

In some positive feed oil lubrication systems the pump must both increase the oil pressure and ___ the oil

A

Meter

37
Q

A reciprocating force feed lubricator can be adjusted to ___ the flow of lubricant

A

Control

38
Q

In metered lubrication, lubricants is dispensed to the individual lubrication points by (a) ____

A

Separate metering device

39
Q

In a two line header lubrication system, the control valve?

A

Reverses the lubricant flow

40
Q

A centralized lubrication system is also called ___ metering

A

Progressive

41
Q

In addition to weather and dirt, a plant’s ____ should be considered in protecting lubricants stored outside.

A

Equipment

42
Q

New grease being added to a grease distribution system should be _____

A

At room temperature

43
Q

Used lubricating oils can be made suitable for reuse by purification or ______

A

Reclamation

44
Q

The gravity setting method of purifying oil is

A

Effective

45
Q

Final filtering of fluids can be accomplished by using:

A

Sintered metals

46
Q

The single greatest cause of lubricant failure is:

A

Contamination of the lubricant

47
Q

The main purpose of using route sheets for all lubricators is to:

A

Make sure all lubrication is performed

48
Q

One of the best ways to prevent lubricators from using the wrong lubricant is to provide:

A

Color coded fitting on the equipment

49
Q

The first step in computerizing a plant’s lubrication program is to?

A

Survey all lubrication requirements

50
Q

Which number means “monthly” on a 5 day work week coding system?

A

20

2nd Sixth (8 decks)

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