1
GATE ME 1992
MCQ (Single Correct Answer)
+1
-0.3
Starting friction is low in
A
hydrostatic lubrication
B
hydrodynamic lubrication
C
mixed (or semi-fluid) lubrication
D
boundary lubrication
2
GATE ME 1991
Subjective
+1
-0
Match the roling element bearings with the most appropriate loading condition

Bearing - type
(a)$$\,\,\,\,\,\,$$ Ball bearing
(b)$$\,\,\,\,\,\,$$ Roller bearing
(c)$$\,\,\,\,\,\,$$ Needle bearing
(d)$$\,\,\,\,\,\,$$ Taper roller bearing

Loading condition
(p)$$\,\,\,\,\,\,$$ Tangential load
(q)$$\,\,\,\,\,\,$$ Radial load
(r)$$\,\,\,\,\,\,$$ Heavy radial load with impact
(s)$$\,\,\,\,\,\,$$ Light radial load with space limitation
(t)$$\,\,\,\,\,\,$$ Heavy radial and axial load
(u)$$\,\,\,\,\,\,$$ Fatigue load

3
GATE ME 1988
MCQ (Single Correct Answer)
+1
-0.3
If the load on a ball bearing is reduced to half, the life of the ball bearing will
A
increase $$8$$ times
B
increase $$4$$ times
C
increase $$2$$ times
D
not change
4
GATE ME 1987
MCQ (Single Correct Answer)
+1
-0.3
The expected life of a ball bearing subjected to a load of $$9800N$$ and working at $$1000RPM$$ is $$3000$$ hours. What is the expected life of the same bearing for a similar load of $$4900$$ $$N$$ and a speed of $$2000rpm$$
A
Unchanged
B
$$12,000$$ hours
C
$$1,500$$ hours
D
$$6,000$$ hours
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Turbo Machinery
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