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Machine Design 2 > M4. Ball Bearing > Flashcards

M4. Ball Bearing Flashcards

1
Q

Which of the following device is used for
transmitting energy in CNC machine tools?
A. Recirculating ball screw and nut assembly
B. Screw and nut assembly
C. Pulley and belt
D. Gears

A

A

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2
Q

Which of the following is the ratio of the
fatigue strength without a stress concentration to the
fatigue stress with a stress concentration?
A. Factor of safety
B. Fatigue stress concentration factor
C. Reliability factor
D. Wahl’s factor

A

B

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3
Q

Roller bearing is utilized on __________
carrying capacity and is better than ball bearing in this
condition.
A. High temperature load C. Low load
B. Heavy load D. Reversing load

A

B

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4
Q

To hold to minimum the axial direction
of deflection/movement, a separate thrust bearing or pre-
loaded bearing capable of absorbing considerable load is
required; the type of bearing to use is:
A. Deep groove ball
B. Double row angular contact
C. Tapered roller bearing
D. Wide type self-aligning

A

B

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5
Q

To avoid scoring in the bearing surface
and the shaft due to contamination/absorption of the fine
dirt in the bearing during operation/lubrication, the bearing
material to apply should have good ________ properties.
A. Anti-scoring
B. Corrosion resistance
C. Corrosion resistance conformability
D. Embeddability

A

D

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6
Q

What do impact tests measure?
A. Compactness C. Plasticity
B. Ductility D. Toughness

A

D

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7
Q

The material that can cut or wear the
hardest substance subjected to2
:
A. Abrasive C. Tungsten
B. Carbide D. Vanadium

A

A

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8
Q

When working on bearings and
checking for high spots, it is customary to apply:
A. Dykem blue C. Red lead
B. Prussian blue D. White lead

A

B

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9
Q

Steel balls of ball bearing are
manufactured by:
A. Casting C. Rolling
B. Cold heading D. Turning

A

B

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10
Q

Ball bearings are provided with a cage:
A. To facilitate the slipping of balls
B. To maintain the balls at a fixed distance apart
C. To prevent the lubricant out
D. To reduce friction

A

B

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11
Q

An object in equilibrium may not have:
A. Acceleration C. Any torque acting on it
B. Any force acting on it D. Velocity

A

A

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12
Q

Babbitt metal is used primarily in:
A. Ball bearings C. Sleeve bearings
B. Roller bearings D. Thermocouples

A

C

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13
Q

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

A

A

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14
Q

Various kinematic pairs are given below,
choose the (lower) power pair.
A. Ball bearings C. Crank shaft and bearing
B. Cam and follower D. Tooth gear in mesh

A

A

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15
Q

A less expensive bearing for light loads.
A. Babbittized bearing C. Roller bearing
B. Ball bearing D. Thrust bearing

A

B

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16
Q

Roller bearings is utilized on _______
carrying capacity and is better than ball bearing in this
condition.
A. High temperature load C. Low load
B. Heavy load D. Reversing load

A

B

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17
Q

To hold to minimum the axial direction
of deflection/movement, a separate thrust/ preloaded
bearing capable of absorbing considerable load is required.
The type of bearing to use is:
A. Deep groove ball
B. Double row angular contact
C. Tapered roller bearing
D. Wide type self-aligning

A

B

18
Q

For better mounting of bearing, it is
preferred to heat the inner ring in the range of 200°F and
______ but never more than ______ as overheating might
reduce the ring hardness.
A. 250 °F C. 300 °F
B. 280 °F D. 320 °F

A

A

19
Q

Ball bearing is less expensive than roller
bearing when applied economically or requirement in:
A. High load C. Static installation
B. Low load D. Steady load

A

D

20
Q

The purpose of these parts in application
are to have better bearings to seal the guard against
marring, etc.
A. Journal bearings C. Shaft seals
B. Metallic seals D. Washers

A

D

21
Q

Which of the following materials is
unsuitable as a bearing?
A. Cast iron C. Nylon
B. Low carbon steel D. Teflon

A

B

22
Q

Which of the following is NOT a function of
bearings?
A. To give free rotation to the shaft
B. To guide the shaft
C. To support the shaft
D. To transmit power

A

D

23
Q

The property of the bearing material to yield
and adopt its shape to that of journal.
A. Conformability C. Endurance limit stress
B. Embeddability D. Viscosity

A

A

24
Q

It is the ability to deform plastically to
compensate for irregularities in bearing assembly.
A. Conformability C. Embeddability
B. Elasticity D. Plasticity

A

A

25
Q

Bearings are generally made of :
A. Gunmetal C. Mild steel
B. Tin D. Cast iron

A

A

26
Q

Special bearing used with high deflection.
A. Babbitt C. Ball
B. Roller D. Self-aligning

A

D

27
Q

What is the operating temperature range of
oil films in the bearing?
A. 130°F to 150°F C. 150°F to 170°F
B. 140°F to 160°F D. 160°F to 180°F

A

B

28
Q

The following are types of ball bearing
EXCEPT:
A. Deep-groove C. Self-aligning
B. Filling-slot D. Shallow-groove

A

D

29
Q

Which of the following pairs is formed if shaft
is revolving in a bearing?
A. Cylindrical pair C. Sliding pair
B. Lower pair D. Turning pair

A

B

30
Q

In general, in order to engage securely and
prevent dragging the clearance between release bearing and
release collar in a clutch is usually:
A. 2 - 3 mm C. 6 - 7 mm
B. 4 - 5 mm D. 8 - 9 mm

A

A

31
Q

These are surfaces that do not conform to
each other very well as in the rolling-element bearings.
A. Conformal surfaces C. Rolling surfaces
B. Non-conformal surfaces D. Sliding surfaces

A

B

32
Q

The most widely used ball bearing and is
employed in many modified forms; it is also known as the
“Conrad” type or “Deep-groove” type.
A. Double-row Bearings
B. Single-row Angular-contact
C. Single-row Radial, Filling Slot
D. Single-row Radial, Non-filling Slot

A

D

33
Q

What is this type of ball bearing in which the
balls are assembled by the eccentric displacement of the
inner ring?
A. Deep-groove ball bearing
B. Filling-slot ball bearing
C. Self-aligning ball bearing
D. Shallow groove ball bearing

A

A

34
Q

The 300 series bearing is called:
A. Heavy series C. Medium series
B. Light series D. None of these

A

C

35
Q

The 200 series bearing is called:
A. Heavy series C. Medium series
B. Light series D. None of these

A

B

36
Q

To avoid scoring in the bearing surface and
the shaft due to contamination/absorption of the fine dirt
in the bearing during operation/lubrication, the bearing
material to apply should have good ______ properties.
A. Anti-scoring C. Conformability
B. Corrosion resistance D. Embeddability

A

D

37
Q

To avoid scoring in the bearing surface and
the shaft due to contamination/absorption of the fine dirt
in the bearing during operation/lubrication, the bearing
material to apply should have good ______ properties.
A. Anti-scoring C. Conformability
B. Corrosion resistance D. Embeddability

A

D

38
Q

For thrust bearing, the speed at moderate
operating conditions is:
A. 50 < Vm > 200 fpm C. 50 < Vm > 250 fpm
B. 50 < Vm > 220 fpm D. 50 < Vm > 290 fpm

A

A

39
Q

Steel balls for ball bearings are manufactured
by:
A. Casting C. Rolling
B. Cold heading D. turning

A

B

40
Q

Which of the following is NOT a type of ball
bearing?
A. Deep-groove C. Self-aligning
B. Filling-slot D. Shallow groove

A

D

Machine Design 2 (5 decks)

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