Lubricants Quiz | Lubricants Objective Type Questions and Answers

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Questions
21 The best example for semi-liquid lubricant is
A Lard oil
B Graphite
C Grease
D Castor oil

Answer: Grease
22 Best example for gravity feed lubrication is
A Tell-tale lubricator
B Ring lubricator
C Wick feed lubricator
D Grease gun

Answer: Wick feed lubricator
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23 Most common type of cutting fluid used in almost all the machining operation is
A Soluble oil
B Compressed air
C Water
D Lard oil

Answer: Soluble oil
24 Graphite is a
A Solid lubricant
B Semi-liquid lubricant
C Liquid lubricant
D None of the above

Answer: Solid lubricant
25 The best example for splash lubrication is
A Grease gun
B Wick feed lubricator
C Pump lubricator
D Ring lubricator

Answer: Ring lubricator
26 Which one of the following is the reason that tap water is not preferred as coolant on machine tool ?
A Danger of corrosion
B It has insufficient cooling effect
C Due to high cooling effect the cutting edges of the tool break off
D None of the above

Answer: Danger of corrosion
27 Which one of the following frictions occurs in an un-lubricated journal bearing ?
A Fluid friction
B Sliding friction
C Dry friction
D Rolling friction

Answer: Dry friction
28 In which one of the following materials no cutting oil is used when drilling ?
A Grey cast iron
B Tool steel
C Aluminium
D Copper

Answer: Grey cast iron
29 Viscosity numbering system is used to rate the _____ of engine, oil.
A Oil temperature
B Oil weight
C Thickness
D Oil gravity

Answer: Thickness
30 High engine oil consumption can not he caused by
A Worn piston rings or cylinders
B Leaking valve cover gaskets
C Oil leakage into combustion chambers
D Leaking exhaust manifold gaskets

Answer: Oil leakage into combustion chambers
31 For heavy cutting, the effective lubricants are _________
A cutting oils
B kerosene
C coconut oils
D diesel

Answer: cutting oils
32 The lubricants that are suitable for internal combustion engines must have ______ viscosity index.
A minimum
B low
C high
D None

Answer: high
33 Slideways of a machine are frequently lubricated by
A Wick feed lubricator
B Grease gun
C Oilcan
D Ring lubricator

Answer: Oilcan
34 The effective cutting of steel with hand hacksaw, which one of the following coolants is suitable ?
A Kerosene oil
B Grease
C Lard oil
D Cutting oil

Answer: Cutting oil
35 Which among the following is NOT a purpose of greasing ?
A Provide a cushion to a load and shocks
B Prevent metal-to-metal contact and reduce friction
C Prevent entry of foreign material i.e dust, dirt etc. in the bearing
D Carry away the heat produced in bearing

Answer: Carry away the heat produced in bearing
36 The most important quality of any lubricant is
A Specific heat
B Specific gravity
C Viscosity
D Emulsification

Answer: Viscosity
37 Which one of the following is common method for applying cutting fluid on the tool point ?
A With a brush
B With an oilcan
C With high pressure jet
D Either 'B' or 'C'

Answer: With high pressure jet
38 While machining cast iron, the coolant used should be
A Soft water
B Machine oil
C Kerosene
D Dry air

Answer: Dry air

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