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Lubricants- Introduction, Types
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Lubricant act as a coolant to carry away heat.
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1 point
True
False
Following is/are the property/ies of lubricant
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reduces friction
b) increases smoothness
acts as coolant
all of these.
Lubrication is necessary to protect wear and tear caused due to
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1 point
Electrostatic force
Gravitational force
Frictional force
Magnetic force
On increasing the lubrication, the efficiency of the machine
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1 point
Increases
Decreases
Remain same
Does not get affected
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vegetable oil is ___ type of lubricant
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1 point
solid
semi-sloid
liquid
gase
Graphite is ___ type of lubricant
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1 point
solid
semi-sloid
liquid
gase
The friction is needed to be reduced because _____
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1 point
it will increase the load
it will increase the consumption electricity
it will be reducing the excess heat generation
it will increase the excess the heat generation
At high temperature lubricants used may undergo ________
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vulcanization
volatilization
lubrication
combustion
_____oils are obtained by mixing of two or more lubricants together.
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1 point
vegetable
animal
mineral
blended
Petroleum jelly is ___ type of lubricant
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1 point
solid
semi-sloid
liquid
gase
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