Best GTU MCQ Material For Applied Chemistry Chapter Lubricants And GTU Mock Test IMP Questions With Solutions
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| Chapter Lubricants |
Chemistry | Chapter Lubricants Q & A
1.
Which type of lubricants are Grease and Vaseline ?
Answer : Semi solid
2. For fluid film (hydrodynamic) Lubrication _________ lubrication is used.
Answer : Liquid
3.
Which oil is used as a lubricant in bearing and vehicles ?
Answer : Olive oil
4.
Silicones are _________ Lubricants.
Answer : Synthetic
5.
What is the unit of viscosity ?
Answer : Poise
6. To
measure the flash point of a liquid fuel ________ instrument is used.
Answer : Pensky martens
7.
Shear strength should be ______ in boundary lubrication.
Answer : More
8.
Select solid lubricant in below.
Answer : Graphite
9.
Viscosity of lubricating oil determined by _______ .
Answer : Redwood viscometer
10.
The temperature at which oil becomes cloudy in appearance is called
_______ .
Answer : Cloud point
11.
________ is used to measure the flash point & fire point of lubricants.
Answer : Pensky martin apparatus
12.
Lubricants are used to reduce the __________ resistance between two moving
surfaces.
Answer : Frictional
13.
The temperature at which the liquid lubricant no longer flow is called
_________ .
Answer : Pour point
14.
Which type of lubricant is used in heavy machineries ?
Answer : Solid
15.
The temperature at which when a flame is kept near to the vapour of fuel and it
is burnt continuously then it is called __________ of that fuel.
Answer : Flash point
16.
The mixture of oil and water is called _________ .
Answer : Suspension solution
17.
The number of milligrams of KOH required to make soap from 1 gm of oil is
called _______.
Answer : Saponification number
18.
Which type of lubricant is used for speedy, soft and light weight machines ?
Answer : Solid
19.
Select semi solid lubricant in below.
Answer : Greases, Vaseline
20.
Which oil is used in cloth industry machinery ?
Answer : Olive oil
21.
Which type of lubricant is use in air craft engine ?
Answer : Synthetic Lubricant
22.
Which meter is use for measurment of viscosity ?
Answer : Redwood viscosity
23.
What is meaning of no. of milligrams of KOH required to saponify 1 gm of oil.
Answer : Saponification number
24.
A substance which introduce between moving to reduce friction is called ______
.
Answer : Lubricant
25.
From the following which is not a function of lubricant ?
Answer : Reduce the impact
26.
In which of the following instrument fluid film lubrication is applicable ?
Answer : Sewing machine
27.
Which type of lubricants can be used for railway track joints ?
Answer : Solid
28.
The process of applying lubricant to the moving surface is called _______ .
Answer : Lubrication
29.
Saponification number is the number of milligrams of __________ required
to sponify fatty material persent in 1 gm of the oil.
Answer : KOH
30. Grease
is an example of __________ Lubricant.
Answer : semi solid
31.
Which of the following are additives of lubricant ?
Answer : Corrosion inhibitors, Froth inhibitors, Anti - oxidants
32.
Purpose of lubrication ?
Answer : - High boiling point
- High viscosity
index
- Thermal
stability
- Corrosion
prevention
- Hydraulic
stability
- Low freezing
point
- High resistance
to oxidation
33.
__________ is important
properties of lubrication ?
Answer : Viscosity
34. Lubrication oil used for ___________ .
Answer : Minimised friction
35. The measure of oil's resistance to flow
_________ .
Answer : Viscosity
36.
__________ lubricant oil used for
railway tracks ?
Answer : Graphite
37. Which lubricant is best for tractor
rolling ?
Answer : Grease
38. Lubricating
oil....
Answer : - Minimizes wear
in moving parts
- Helps in keeping the parts cool
- Washes away and carries away dirt
39. The point at which the ignitable vapours
emitted by the oil is sufficient to support a flame
Answer : Fire
Point
40. What
is meaning of no. of milligrams of KOH required to neutralize 1 gm of oil.
Answer : Neutralization number
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