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IKING 2 > M3.1 > Flashcards

M3.1 Flashcards

123

1
Q

) What is a unique form of cast iron with
worm shaped graphite particles?
A. Wrought iron C. Mottled cast iron
B. Compacted graphitic iron D. Malleable cast iron

A

B

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2
Q

The absolute viscosity of the fluid
divided by its density expressed in same term of units:
A. Centistokes C. Light petroleum oil
B. Kinematic viscosity D. Petroff’s equation

A

B

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3
Q

Which of the following safety
precautions should be followed when pouring babbitt?
A. The operator must wear goggles
B. The surface to be babbitted must be free of moisture
C. The surface to be babbitted must be clean
D. All of the above

A

D

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4
Q

) Also called semi-solid lubricant.
A. Graphite C. Grease
B. Lube oil D. All of these

A

C

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5
Q

Best coolant and lubricant for cast iron:
A. Dry C. Soluble oils
B. Mineral or fatty oils D. Water soluble oils

A

A

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6
Q

A cutting lubricant used in drilling,
reaming, and tapping for aluminum and copper:
A. Dry C. Soda water
B. Kerosene D. Turpentine

A

B

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7
Q

The major element/component of a
Babbitt metal is:
A. Antimony C. Tin
B. Lead D. Zinc

A

C

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8
Q

It is a low-cost bearing used worldwide
for automotive and low horsepower application. It has a thin
coating with _______, all over metal chips.
A. Babbitt C. Lead
B. Cadmium brass D. Tin

A

A

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9
Q

In itself, it is a lubricant and usually one
of the important elements in casting nonferrous metals like
bronze, for example.
A. Antimony C. Lead
B. Babbitt D. Zinc

A

C

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10
Q

All are functions of a lubricant, EXCEPT:
A. Acts as a coolant C. Lightens the load
B. Prevent adhesion D. Prevents corrosion

A

B

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11
Q

It is considered a semi-solid lubricant.
A. Lube oil C. Grease
B. Graphite D. All of these

A

C

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12
Q

Metals that assist lubrication or a
lubricant in itself.
A. Antimony C. Lead
B. Babbitt D. Zinc

A

B

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13
Q

It is caused by foreign matter such as grit or
metal particles or by a failure of the oil film at low speed
A. Abrasion C. Scoring
B. Corrosion D. Spalling

A

A

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14
Q

Metals that assist lubrication or a
lubricant in itself.
C. Antimony C. Lead
D. Babbitt D. Zinc

A

B BABBIT

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15
Q

Which of the following is a hydrometer scale
used for measuring the relative density of liquids?
A. Baume scale C. Beckman scale
B. Beaufort scale D. Buckley scale

A

AA

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16
Q

Which of the following does not have to be
lubricated when drilling?
A. Brass C. Steel
B. Monel D. Tool steel

A

A

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17
Q

It is used between the cutting tool and work
place to minimize the heat due to friction.
A. Alcohol C. Lubricant
B. Coolant D. Water

A

B

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18
Q

These are mixture of hard cotton seed or
rape-seed oils and mineral oils.
A. Cooling oils C. Emulsion
B. Cutting oils D. Heating oils

A

B

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19
Q

It is a lubrication type or a condition where
non-conformal surfaces are completely separated by
lubricant film and no asperities are in contact.
A. Boundary C. Hydrodynamic
B. Elastohydrodynamic D. Solid film lubrication

A

B

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20
Q

Substances having sufficient carbon and/or
hydrogen for chemical oxidation to produce exothermally,
worthwhile quantities of heat.
A. Fuels C. Grease
B. Graphite D. Lubrication

A

A

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21
Q

It is considered a semi-solid lubricant.
C. Lube oil C. Grease
D. Graphite D. All of these

A

C

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22
Q

Which of the following dynamometer is
widely used for absorption of wide range of powers at wide
range of
speeds?
A. Belt transmission C. Hydraulic
B. Electric generator D. Rope brake

A

C

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23
Q

A bearing Lubrication obtained by
introducing the lubricant, which is sometimes air or water ,
into the load bearing area at a pressure high enough to
separate surfaces with a relatively thick film of lubricant.
This Lubrication does not require motion of one surface
relative to another.
A. Boundary Lubrication C. Hydrostatic Lubrication
B. Hydrodynamic LubricationD. Solid Film Lubrication

A

C

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24
Q

What is the recommended lubricant for the
chain drive operation?
A. Graphite C. Molybdenum Disulfide
B. Grease D. Petroleum oil

A

D

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25
Q

Which of the following refers to the measure
of fluid sensitivity to changes in viscosity with changes of
temperature?
A. Viscosity coefficient C. Viscosity index
B. Viscosity factor D. Viscosity ratio

A

C

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26
Q

) Rope brake dynamometer uses what type of
lubricant?
A. Grease as lubricant C. Oil as lubricant
B. No lubricant . D. Water as lubricant

A

B

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27
Q

If a set of spur gears are made, installed, and
lubricated properly, they normally may be subjected to
failures like:
A. Pitting C. Surface fatigue
B. Scouring D. Breakage

A

A

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28
Q

) If a set of spur gears are made, installed, and
lubricated properly, they normally may be subjected to
failures like:
C. Pitting C. Surface fatigue
D. Scouring D. Breakage

A

A PITTING

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29
Q

Materials having thermal expansion of about
10 times higher than those of metals and has more heat
generated during machining is:
A. Aluminum C. Plastic
B. Asbestos D. PVC

A

C

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30
Q

) All are functions of a lubricant, EXCEPT:
C. Acts as a coolant C. Lightens the load
D. Prevent adhesion D. Prevents corrosion

A

B PREVENT ADHESION

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31
Q

In ASTM standard, what is the instrument
used in determining viscosity?
A. Dynamic viscometer
B. Hagen–Poiseuille viscometer
C. Saybolt universal furol
D. Saybolt universal viscometer

A

D

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32
Q

It occurs when the oil film fails, but in this
case, the load and speed are so high that the metal is melted
and the metal is smeared down the profile. What is this?
A. Abrasion C. Scoring
B. Corrosion D. Spalling

A

C

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33
Q

) It is a surface fatigue of greater extent than
pitting that is the flakes are much larger. This type of failure
occurs in surface-hardened teeth.
A. Abrasion C. Scoring
B. Corrosion D. Spalling

A

D

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34
Q

Which of the following dynamometer is used
for power measurement when the speed is high and the
viscous force is small?
A. Tesla fluid friction dynamometer
B. Froude water vortex dynamometer
C. Rope brake dynamometer
D. Amsler dynamometer

A

A

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35
Q

For hydrocarbon oils, the specific gravity will
be closed to:
A. 0.76 C. 0.83
B. 0.80 D. 0.93

A

C

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36
Q

) At higher temperatures, oil oxidizes more
rapidly above:
A. 120 °F C. 160 °F
B. 140 °F D. 200 °F

A

D

37
Q

A Babbit bearing material maybe melted in a
pouring ladle over an open fire. The temperature is about
right when a wooden pine stick used for stirring chars but
does not ignite and at the same stage the molten metal
temperature is in the vicinity of:
A. 590 °F C. 870 °F
B. 760 °F D. 1010 °F

A

C

38
Q

The measure of fluid resistance when acted upon by an
external force.
A. Density C. Tackiness
B. Flash Point D. Viscosity

A

D

39
Q

A dry lubricant with a high electrical conductivity; in
powdered form, it can be applied to the rubbing surfaces or
it can be used with sintered metals.
A. Boron Nitride C. Molybdenum Disulfide
B. Graphite D. Niobium Diselenide

A

D

40
Q

A common dry lubricant used as a powdered mineral or
suspended in oils or greases that tends to “plate” onto
surfaces.
A. Boron Nitride C. Molybdenum Disulfide
B. Graphite D. Niobium Diselenide

A

C

41
Q

A very expensive white powdered mineral used as a dry
lubricant.
A. Boron Nitride C. Molybdenum Disulfide
B. Graphite D. Niobium Diselenide

A

A

42
Q

It is the property of a lubricating oil due to which the oil
retains a thin film between the two surfaces.
A. Adhesiveness C. Oiliness
B. Film Strength D. None of these

A

B

43
Q

It is the measure of the density of oil.
A. Adhesiveness C. Specific gravity
B. Film Strength D. None of these

A

C

44
Q

It is the property of lubricating oil due to which the oil
particles stick with the metal surfaces.
A. Adhesiveness C. Pour point
B. Oiliness D. None of these

A

A

45
Q

The API gravity is measured in:
A. Gravity meter scale C. Richer scale
B. Hydrometer scale D. None of these

A

B

46
Q

For machines operating at the high speed and low pressure
__________ are used.
A. Crude oils C. Heavy oils
B. Diesel oil D. Light oils

A

D

47
Q

Excessive friction takes place when the viscosity is:
A. Moderate C. Too low
B. Too high D. Zero

A

B

48
Q

The viscosity of the oil changes rapidly with the change in
temperature has:
A. High V.I. C. Moderate V.I.
B. Low V.I. D. Zero V.I.

A

D

49
Q

The following are not a lighter fraction of fuel oil EXCEPT:
A. Aviation fuel C. Gasoline
B. Boiler fuel D. Kerosene

A

B

50
Q

The minimum temperature at which fuel oil can be ignited.
A. Pour point C. Heating value
B. Flash point D. Viscosity

A

B

51
Q

It is the separation of some of the liquid phase from a grease.
A. Adhesion C. Cohesion
B. Bleeding D. Contaminant

A

B

52
Q

When the API rating is not known, an assumed value of
_____ may be used.
A. 0.75 C. 0.85
B. 0.80 D. 0.90

A

C

53
Q

. Mathematically, viscosity index can be given by:
A. {(L+U)/(L-H)}100 C. {(L -U)/(L+H)}100
B. {(L+U)/(L+H)}100 D. {(L -U)/(L-H)}100

A

D

54
Q

Which property measures the resistance of a liquid to flow?
A. Density C. Viscosity
B. Volume D. Solubility

A

C

55
Q

What happens to the viscosity of liquid with the increase in
temperature?
A. Increases C. Decreases
B. No change D. increases/decreases

A

C

56
Q

The coefficient of friction in fluid film or hydrodynamic
lubrication is:
A. 0.1 to 0.3 C. 0.01 to 0.03
B. 0.001 to 0.03 D. None of these

A

B

57
Q

This is an anti-wear additive in extreme pressure.
A. Graphite C. Soapstone
B. Mica D. Tricresyl Phosphate

A

D

58
Q

Graphite is a ________ lubricant.
A. Liquid C. Solid
B. Semi-solid D. None of these

A

C

59
Q

Calcium soap base grease is also called:
A. Axle grease C. Soap grease
B. Cup grease D. None of these

A

B

60
Q

What is the SI unit of viscosity?
A. Candela C. Poiseiulle
B. Newton/m D. Stokes

A

C

61
Q

Which of the following are the properties of lubricants?
A. Fire point C. Viscosity
B. Flash point D. All of these

A

D

62
Q

The coefficient of friction for boundary lubrication is:
A. 0.5 to 15 C. 0.005 to 0.05
B. 0.5 to 0.15 D. 0.05 to 0.15

A

D

63
Q

. It is the property which enables oil to spread over and
adhere to the surface of the bearing.
A. Fire point C. Pour point
B. Oiliness D. None of these

A

B

64
Q

That property of a substance that causes it to resist being
pulled apart by mechanical means.
A. Adhesion C. Cohesion
B. Bleeding D. Contaminant

A

C

65
Q

The property of a lubricant that causes it to cling or adhere
to a solid surface.
A. Adhesion C. Cohesion
B. Bleeding D. Contaminant

A

A

66
Q

A type of oil used in machines operating at high pressure and
slow speeds.
A. Crude oil C. Heavy oil
B. Diesel oil D. Kerosene

A

C

67
Q

The common lubrication system used in IC engines of an
automobile is called:
A. Gravity System C. Pressure System
B. Petrol System D. Splash System

A

C

68
Q

used in a:
A. Four-stroke diesel engine C. Wankel engine
B. Four-stroke petrol engine D. Two-stroke engine

A

D

69
Q

. It is lubricated by pressure feed system.
A. Cams on cam shaft C. Tappet
B. Piston rings D. Timing gears

A

D

70
Q

In two-stroke engines, the type of lubrication system
employed in the crankcase is the:
A. Dry sump lubrication C. Splash lubrication
B. Mist lubrication D. Wet sump lubrication

A

B

71
Q

In a CGS system, it is the unit of kinematic viscosity.
A. Stokes C. Poise
B. Pa∙sec D. Reyn

A

A

72
Q

A type of lubricant composed of lubricant oils thickened with
a material that contributes a degree of plasticity.
A. Graphite C. Motor oil
B. Grease D. All of these

A

B

73
Q

A crystalline form of carbon having a laminar structure,
which is used as a lubricant.
A. Graphite C. Molybdenum disulfide
B. Grease D. All of these

A

A

74
Q

Oil that is used to lubricate the moving components of an
internal-combustion engine.
A. Kerosine oil C. Motor oil
B. Mineral oil D. All of these

A

C

75
Q

The degree Baume gravity is measured in:
A. Gravity meter scale C. Richer scale
B. Hydrometer scale D. None of these

A

B

76
Q

The progressive failure of a machine or lubricant.
A. Degradation C. Emulsifier
B. Demulsibility D. Volatility

A

A

77
Q

The use of Petroff’s equation to calculate the coefficient of
friction assumed that the lubricant film thickness is:
A. Converging C. Non-uniform
B. Diverging D. Uniform

A

D

78
Q

The viscosity of petroleum oil for hydraulic lifts is:
A. High C. Moderate
B. Low D. Very high

A

B

79
Q

The property of a liquid that defines its evaporation
characteristics.
A. Degradation C. Emulsifier
B. Demulsibility D. Volatility

A

D

80
Q

Viscosity means the flow of the liquid is resisted by:
A. Alcohol C. Other liquid
B. Itself D. Water

A

B

81
Q

The viscosity of an oil decrease when temperature ________
A. Decreases C. Is constant
B. Increases D. It varies

A

B

82
Q

The rate of change of the viscosity with raise in temperature
is measured by an arbitrary scale called as _________
A. Arbitrary constant C. Viscosity constant
B. Arbitrary index D. Viscosity index

A

D

83
Q

A lubricant’s ability to separate from water.
A. Degradation C. Emulsifier
B. Demulsibility D. Volatility

A

B

84
Q

An additive that promotes the mixing of water and oil to
form an intimate mixture of the oil and water.
A. Degradation C. Emulsifier
B. Demulsibility D. Volatility

A

C

85
Q

Any foreign or unwanted substance that can have a negative
effect on system operation, life, or reliability.
A. Adhesion C. Cohesion
B. Bleeding D. Contaminant

A

D

86
Q

The lubricating oil is circulated in an IC engine by:
A. Centrifugal pump
B. Natural circulation thermosiphon
C. Positive displacement pump
D. Soot blower

A

C

87
Q

What is the importance of the valley on an irregular surface?
A. Improve surface texture
B. Reduce metal to metal contact
C. Reduce stress concentration
D. Retain film of lubricating oil

A

D

88
Q

When an oil is heated to above this temperature, its viscosity
changes abruptly, and oxidation occursix
.
A. 135°F C. 155 °F
B. 145 °F D. 165 °F

A

C

89
Q

Lubrication is necessary to protect wear and tear caused by:
A. Electrostatic force C. Gravitational force
B. Frictional force D. Magnetic force

A

B

IKING 2 (10 decks)

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