GATE ME 2024 | Design of Bearings Question 1 | Machine Design

GATE ME 2024

MCQ (Single Correct Answer)

-0.33

For a ball bearing, the fatigue life in millions of revolutions is given by $L = \left(\frac{C}{P}\right)^n$, where $P$ is the constant applied load and $C$ is the basic dynamic load rating. Which one of the following statements is TRUE?

$n = 3$, assuming that the inner racing is fixed and outer racing is revolving

$n = 1/3$, assuming that the inner racing is fixed and outer racing is revolving

$n = 3$, assuming that the outer racing is fixed and inner racing is revolving

$n = 1/3$, assuming that the outer racing is fixed and inner racing is revolving

GATE ME 2022 Set 1

MCQ (Single Correct Answer)

-0.33

A CNC worktable is driven in a linear direction by a lead screw connected directly to a stepper motor. The pitch of the lead screw is 5 mm. The stepper motor completes one full revolution upon receiving 600 pulses. If the worktable speed is 5 m/minute and there is no missed pulse, then the pulse rate being received by the stepper motor is

20 kHz

10 kHz

3 kHz

15 kHz

GATE ME 2016 Set 3

MCQ (Single Correct Answer)

-0.3

Which of the bearings given below SHOULD NOT be subjected to a thrust load?

Deep groove ball bearing

Angular contact ball bearing

Cylindrical (straight) roller bearing

Single row tapered roller bearing

GATE ME 2014 Set 4

Numerical

-0

Ball bearings are rated by a manufacturer for a life of $${10^6}$$ revolutions. The catalogue rating of a particular bearing is $$16$$ $$kN.$$ If the design load is $$2$$ $$kN,$$ the life of the bearing will be $$P \times {10^6}$$ revolutions, where $$P$$ is equal to ___________.

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