Which liquid lubricant is the most commonly used class?

Which liquid lubricant is the most commonly used class?

a. Mineral oils
b. Fixed oils
c. Synthetic oils
d. High viscosity oil
e. Low viscosity oil





Answer: A

Aluminum Base Greases may be used for temperatures up to __°C.

Aluminum Base Greases may be used for temperatures up to __°C.

a. 82
b. 98
c. 65
d. 74
e. 57






Answer: A

Barium and Lithium Base Greases are suitable for extreme low temperatures __°C.

Barium and Lithium Base Greases are suitable for extreme low temperatures __°C.

a. -80
b. -40
c. -60
d. -50
e. -10






Answer: D

Sodium (Soda) Base Greases are suitable for temperatures as high as ___°C.

Sodium (Soda) Base Greases are suitable for temperatures as high as ___°C.

a. 150
b. 120
c. 180
d. 100
e. 160





Answer: B

Calcium (Lime) Base Greases are not suitable for use where temperatures exceed __C.

Calcium (Lime) Base Greases are not suitable for use where temperatures exceed __C.

a. 55
b. 91
c. 42
d. 84
e. 71






Answer: E

The semi-solid lubricants or greases are produced by combining a ___ lubricant, usually petroleum oil, with a __ agent.

The semi-solid lubricants or greases are produced by combining a ___ lubricant, usually petroleum oil, with a __ agent.

a. solid, thinning
b. liquid, thickening
c. liquid, thinning
d. solid, thickening






Answer: B

A material that is commonly used as a solid lubricant is:

A material that is commonly used as a solid lubricant is:

a. tallow, graphite, molybdate sulfide, mica, and polymer films
b. graphite, soapstone, molybdenum disulphide, mica, and polymer films
c. lime, sodium carbonate, molybdate sulfide, mica, and polymer films
d. lime, graphite, molybdenum disulphide, tallow, and polymer films
e. graphite, soapstone, molybdate sulfide, mica, and polymer films






Answer: B

Which one is NOT a service a lubricant must provide:

Which one is NOT a service a lubricant must provide:

a. Fluidity at high temperatures
b. Minimum coefficient of friction
c. Resistance to oxidation
d. Maximum adhesion to the surfaces to be lubricated
e. Resistance to emulsion






Answer: A

High viscosity oils are normally used for the following applications:

High viscosity oils are normally used for the following applications:

a) low speed, high load
b) low speed, low pressure
c) high speed, high load
d) high speed, low temperature
e) high temperature, low load





Answer: A

Oil additives

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 lube oils
e) never lose their effect during use of the oil



Answer: A

Which type of grease is the cheapest and most commonly used?

Which type of grease is the cheapest and most commonly used?

a) lithium base
b) teflon base
c) paraffin base
d) calcium base
e) silicon base






Answer: A

Lubricant for an anti-friction bearing is

Lubricant for an anti-friction bearing is

a) mineral oil
b) graphite
c) calcium or lime base grease
d) not required
e) barium and lithium base grease






Answer: E

A semi-solid lubricant:

A semi-solid lubricant:

a) can only be used for high temperature services
b) has a low viscosity
c) is less likely to drip or splash from bearings
d) has a low pour point
e) is best suited for heat removal





Answer: C

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

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





Answer: D

Relative to lubrication, one place where wear is beneficial is

Relative to lubrication, one place where wear is beneficial is

a) new babbitt bearing surfaces which wear smooth
b) on pump wear rings
c) on the oil pump sealing surfaces
d) on the cylinder walls of internal combustion engines
e) in antifriction bearings






Answer: A

The cheapest and most commonly used grease is:

The cheapest and most commonly used grease is:

a. Potassium base
b. Chlorine base
c. Lime base
d. Sulphate base
e. Water base




Answer: C

Greases are a mixture of mineral oil and:

Greases are a mixture of mineral oil and:

a. Carbon powder
b. Soap
c. Lard
d. Synthetic oils
e. Paraffin




Answer: B

The point at which oil will give off enough vapour to ignite and burn continuously is known as the _____ point.

The point at which oil will give off enough vapour to ignite and burn continuously is known as the _____ point.

a. Flash
b. Ignition
c. Fire
d. Vaporization
e. Burning






Answer: A

The resistance of a liquid to internal deformation or shear is known as:

The resistance of a liquid to internal deformation or shear is known as:

a. Pour point
b. Viscosity index
c. Flash point
d. Viscosity
e. Friction resistance





Answer: D

All semi-solid lubricants:

All semi-solid lubricants:

a. Have a low viscosity
b. Are capable of sealing out dirt and water from bearings
c. Contain graphite
d. Resist moisture
e. Can be filtered






Answer: B