Q.1
Static load is defined as the load acting on the bearing when shaft is _____
  • a) Stationary
  • b) Rotating at rpm<10
  • c) Rotating at rpm<5
  • d) None of the listed
Q.2
A total permanent deformation of 0.of the ball diameter is taken for considering static load capacity of the shaft.
  • a) True
  • b) False
Q.3
Stribeck equation gives dynamic load capacity of the bearing.
  • a) True
  • b) False
Q.4
Which of the following is expression for stribeck equation?(Number of balls=z)?
  • a) C=kd²z/5
  • b) C=kd²z/15
  • c) C=kd²z/10
  • d) None of the listed
Q.5
The life of an individual ball bearing is the time period for which it works without any signs of failures.
  • a) True
  • b) False
Q.6
For majority of bearings, actual life is considerably greater than rated life.
  • a) True
  • b) False
Q.7
The dynamic load carrying capacity of a bearing is defined as the radial load in radial bearings that can be carried for a minimum life ofrevolutions.
  • a) True
  • b) False
Q.8
In the expression of dynamic load capacity P=XVF(r) + YF(a), V stands for ?
  • a) Race rotation factor
  • b) Radial factor
  • c) Thrust factor
  • d) None of the listed
Q.9
Calculate the bearing life if expected life forbearings isand shaft is rotating at 1500rpm.
  • a) 850 million rev
  • b) 810 million rev
  • c) 810 h
  • d) 850h
Q.10
The bearing is subjected to a radial load of 4000N. Expected life forbearings isand shaft is rotating at 1500rpm. Calculate the dynamic load capacity.
  • a) 42.21kN
  • b) 37.29kN
  • c) 26.33kN
  • d) 35.22kN
Q.11
A rolling contact bearing is specified as XCalculate the bearing diameter.
  • a) 35mm
  • b) 28mm
  • c) 21mm
  • d) 7mm
Q.12
A rolling contact bearing is specified as XDetermine the series.
  • a) Extra light series
  • b) Light series
  • c) Medium series
  • d) Heavy series
Q.13
Needles bearing consist of rollers of small diameter and very small length.
  • a) True
  • b) False
Q.14
Extreme pressure causes ______ wear in the bearing parts.
  • a) Abrasive
  • b) Corrosive
  • c) Pitting
  • d) All of the mentioned
Q.15
Scoring is a ________ phenomenon.
  • a) Stick-slip
  • b) Fracture
  • c) Fatigue
  • d) In-out
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