Power Engineering - 4B1, 4B2, 4B7 Practice
Questions Complete With 100% Verified Answers
If lubricating oil has a high viscosity index number, this means the viscosity will:
a. Change a great deal with temperature change
b. Not change at all with temperature change
c. Vaporize with a temperature increase
d. Change little with temperature change
e. Increase in pressure as the temperature decreases.
d. Change little with temperature change
The viscosity of oil:
1. Is the temperature at which oil will burn
2. Determines the ability of the oil to support a load
3. Will prevent corrosion of bearings
4. Indicates the liquid's ability to flow
a. 2, 3, 4
b. 1, 3
c. 3, 4
d. 1, 2, 4
e. 2, 4.
e. 2, 4.
A semi-solid lubricant:
1. Has a high viscosity
2. Is to seal out dirt and water from bearings
3. Cannot be used for high temperature
4. Can be filtered
a. 1, 2, 3, 4
,b. 1, 2, 3
c. 2, 3, 4
d. 1, 2, 4
e. 3, 4.
b. 1, 2, 3
If an oil's viscosity changes much with little temperature change, it will then have a:
a. Low viscosity index
b. High pour point
c. High carbon residue
d. High viscosity index
e. Low pour point.
a. Low viscosity index
Oil additives:
a. Should not affect all other characteristics greatly
b. Will always affect the pour point greatly
c. Should be used as little as possible
d. Are not a component of most lubrication oil
e. Never lose their effect during use of the oil.
a. Should not affect all other characteristics greatly
The two most important functions of lubrication are for the reduction of:
a. Friction and wear
b. Friction and heat
c. Heat and corrosion
d. Flash point and fire point
e. Pour point and corrosion.
a. Friction and wear
The viscosity of oil:
a. Is the temperature at which oil will burn
b. Will prevent corrosion of bearings
c. Determines the ability of the oil to support a load
,d. Refers to carbon content of the oil
e. Is a measure of its ability to freeze.
c. Determines the ability of the oil to support a load
The point at which oil will give off enough vapor to ignite and burn continuously, is known as
the _____ point.
a. Flash
b. Ignition
c. Fire
d. Vaporization
e. Burning.
c. Fire
The property of oil that indicates its ability to support a load is:
a. Viscosity
b. Viscosity index
c. Pour point
d. Floc point
e. Consistency.
a. Viscosity
The majority of lubricants are:
a. Animal fats
b. Synthetic oils
c. Mineral oils
d. Greases
e. Solid types.
c. Mineral oils
The lubricant performs a number of functions. Indicate which of the following are the most
important:
1. Reduce wear
2. Temperature control
3. Reduce corrosion
4. Reduce friction
, a. 1, 2
b. 2, 3
c. 1, 3
d. 1, 4
e. 3, 4.
d. 1, 4
The kind of grease used for heavily loaded machinery operating at slow speeds is the:
a. Sodium base grease
b. Specialty grease
c. Mixed base grease
d. Calcium base grease
e. Acid base grease.
b. Specialty grease
If you desire an oil to flow at a much lower temperature, you would most likely add:
a. A viscosity index improver
b. Pour point depressants
c. A dispersant
d. A thickening agent
e. Low viscosity oil.
b. Pour point depressants
Which of the following has the greatest effect on the viscosity of lubrication oil?
a. Pressure
b. Load
c. Flow
d. Temperature
e. Speed.
d. Temperature
The instrument which measures the viscosity of an oil at a certain temperature as it flows
through a small diameter tube, is called:
Questions Complete With 100% Verified Answers
If lubricating oil has a high viscosity index number, this means the viscosity will:
a. Change a great deal with temperature change
b. Not change at all with temperature change
c. Vaporize with a temperature increase
d. Change little with temperature change
e. Increase in pressure as the temperature decreases.
d. Change little with temperature change
The viscosity of oil:
1. Is the temperature at which oil will burn
2. Determines the ability of the oil to support a load
3. Will prevent corrosion of bearings
4. Indicates the liquid's ability to flow
a. 2, 3, 4
b. 1, 3
c. 3, 4
d. 1, 2, 4
e. 2, 4.
e. 2, 4.
A semi-solid lubricant:
1. Has a high viscosity
2. Is to seal out dirt and water from bearings
3. Cannot be used for high temperature
4. Can be filtered
a. 1, 2, 3, 4
,b. 1, 2, 3
c. 2, 3, 4
d. 1, 2, 4
e. 3, 4.
b. 1, 2, 3
If an oil's viscosity changes much with little temperature change, it will then have a:
a. Low viscosity index
b. High pour point
c. High carbon residue
d. High viscosity index
e. Low pour point.
a. Low viscosity index
Oil additives:
a. Should not affect all other characteristics greatly
b. Will always affect the pour point greatly
c. Should be used as little as possible
d. Are not a component of most lubrication oil
e. Never lose their effect during use of the oil.
a. Should not affect all other characteristics greatly
The two most important functions of lubrication are for the reduction of:
a. Friction and wear
b. Friction and heat
c. Heat and corrosion
d. Flash point and fire point
e. Pour point and corrosion.
a. Friction and wear
The viscosity of oil:
a. Is the temperature at which oil will burn
b. Will prevent corrosion of bearings
c. Determines the ability of the oil to support a load
,d. Refers to carbon content of the oil
e. Is a measure of its ability to freeze.
c. Determines the ability of the oil to support a load
The point at which oil will give off enough vapor to ignite and burn continuously, is known as
the _____ point.
a. Flash
b. Ignition
c. Fire
d. Vaporization
e. Burning.
c. Fire
The property of oil that indicates its ability to support a load is:
a. Viscosity
b. Viscosity index
c. Pour point
d. Floc point
e. Consistency.
a. Viscosity
The majority of lubricants are:
a. Animal fats
b. Synthetic oils
c. Mineral oils
d. Greases
e. Solid types.
c. Mineral oils
The lubricant performs a number of functions. Indicate which of the following are the most
important:
1. Reduce wear
2. Temperature control
3. Reduce corrosion
4. Reduce friction
, a. 1, 2
b. 2, 3
c. 1, 3
d. 1, 4
e. 3, 4.
d. 1, 4
The kind of grease used for heavily loaded machinery operating at slow speeds is the:
a. Sodium base grease
b. Specialty grease
c. Mixed base grease
d. Calcium base grease
e. Acid base grease.
b. Specialty grease
If you desire an oil to flow at a much lower temperature, you would most likely add:
a. A viscosity index improver
b. Pour point depressants
c. A dispersant
d. A thickening agent
e. Low viscosity oil.
b. Pour point depressants
Which of the following has the greatest effect on the viscosity of lubrication oil?
a. Pressure
b. Load
c. Flow
d. Temperature
e. Speed.
d. Temperature
The instrument which measures the viscosity of an oil at a certain temperature as it flows
through a small diameter tube, is called:
