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Free download in PDF Lubricants Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(1)
A high temperature lubricants used may undergo ________
[A]
volatilization
[B]
combustion
[C]
vulcanization
[D]
lubrication
(2)
The reduction in friction is only when _____ of the oil film is ______ than that of the metal.
[A]
shear strain, more
[B]
shear strength, less
[C]
shear strength, more
[D]
shear strain, less
Answer: shear strength, less
(3)
The lubricant in internal combustion is exposed to _________
[A]
high temperature
[B]
high pressure
[C]
low temperature
[D]
low pressure
(4)
In gears, the lubricants are exposed to _______
[A]
low pressure
[B]
high temperature
[C]
low temperature
[D]
high pressure
(5)
For, delicate instruments the suitable lubricants are _____
[A]
heavy cutting oil
[B]
thin vegetable oil
[C]
light cutting oil
[D]
sunflower oil
Answer: thin vegetable oil
(6)
The various grads of oils/referred to
[A]
Japan Society of Automotive Engines.
[B]
British Society of Automotive Engines.
[C]
American Society of Automotive Engines.
[D]
None of the above
Answer: American Society of Automotive Engines.
(7)
Pressure fed oiling is not used with
[A]
Cylinder walls
[B]
Hydraulic lifters
[C]
Crankshaft hearings
[D]
Camshaft bearings
(8)
Flickering oil pressure warning light and off at stop lights is an indication of
[A]
Low pressure problems
[B]
Oil level in the engine low
[C]
Light Circuit at fault
[D]
Oil contaminated
Answer: Low pressure problems
(9)
High oil consumption is indicated by
[A]
Oil indicator light glows
[B]
Oil-wet areas on a or around the engine
[C]
Oil added to engine frequently
[D]
None of the above
Answer: Oil added to engine frequently
(10)
Which one of the following is the best way for preparing an emulsion ?
[A]
Add soluble oil to the water
[B]
Add water to the soluble oil
[C]
Mix soluble oil and water by pouring both simultaneously
[D]
None of the above
Answer: Add soluble oil to the water
(11)
Which one of the following is NOT the property of a good lubricant ?
[A]
Takes up the surface pressure between sliding parts
[B]
Becomes thicker after prolonged use
[C]
No change in viscosity due to variation in temperature
[D]
Reduces friction between machine parts
Answer: Becomes thicker after prolonged use
(12)
Lubricant is necessary to
[A]
Produce workpiece of greater accuracy
[B]
Run the machine smoothly taking least load
[C]
Run the machine quickly
[D]
Stop the machine immediately
Answer: Run the machine smoothly taking least load
(13)
The lubricants for transformers must have quality of good ________
[A]
no resistance to oxygen
[B]
less oiliness
[C]
dielectric strength
[D]
low load capacity
Answer: dielectric strength
(14)
In textile industries ____ are added to the lubricants.
[A]
inhibitors
[B]
carbon
[C]
catalyst
[D]
oxygene
(15)
The lubricants used in refrigerators will have ________
[A]
no pour point
[B]
low cloud point
[C]
high pour point
[D]
high viscosity
(16)
What is the best lubricant for tractor roller?
[A]
grease
[B]
vegetable oil
[C]
graphite
[D]
heavy oil
(17)
What are the lubricants used for railway tracks?
[A]
vegetable oil
[B]
coconut oil
[C]
graphite
[D]
None of the above
(18)
The lubricants for gears must possess ______
[A]
resistance to oxygen
[B]
effected by centrifugal force
[C]
less oiliness
[D]
low load carrying capacity
Answer: resistance to oxygen
(19)
The friction is needed to be reduced because _____
[A]
will increase the consumption electricity
[B]
it will be reducing the excess heat generation
[C]
will increase the load
[D]
will increase the excess the heat generation
Answer: it will be reducing the excess heat generation
(20)
Oil emulsions are the most effective lubricants in _________
[A]
gears
[B]
light cutting
[C]
heavy cuttings
[D]
engines
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