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Machine Design 2 > M3.1 LUBRICATION > Flashcards

M3.1 LUBRICATION Flashcards

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.
A. Antimony B. Lead
C. Babbitt D. Zinc

A

C

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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

A

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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

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

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

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

21
Q

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

A

C

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

23
Q

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

A

C

24
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

25
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

26
Q

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

A

D

27
Q

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

A

C

28
Q

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

A

B

29
Q

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

A

C

30
Q

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

A

D

31
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

32
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

33
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

34
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

35
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

36
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

37
Q

The lubrication method called ‘mist lubrication system’ is
used in a:
A. Four-stroke diesel engine C. Wankel engine
B. Four-stroke petrol engine D. Two-stroke engine

A

D

38
Q

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

A

D

39
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

40
Q

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

A

A

Machine Design 2 (5 decks)

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