M4. Ball Bearing Flashcards
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
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
B
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
B
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
B
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
D
What do impact tests measure?
A. Compactness C. Plasticity
B. Ductility D. Toughness
D
The material that can cut or wear the
hardest substance subjected to2
:
A. Abrasive C. Tungsten
B. Carbide D. Vanadium
A
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
B
Steel balls of ball bearing are
manufactured by:
A. Casting C. Rolling
B. Cold heading D. Turning
B
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
B
An object in equilibrium may not have:
A. Acceleration C. Any torque acting on it
B. Any force acting on it D. Velocity
A
Babbitt metal is used primarily in:
A. Ball bearings C. Sleeve bearings
B. Roller bearings D. Thermocouples
C
Best coolant and lubricant for cast iron
is/are:
A. Dry C. Soluble oils
B. Mineral or fatty oils D. Water soluble oils
A
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 less expensive bearing for light loads.
A. Babbittized bearing C. Roller bearing
B. Ball bearing D. Thrust bearing
B
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
B