Oils and Lubrication

What is the purpose of lubrication?

• To reduce friction, heat and water.

• To increase friction and heat.

• To reduce water.

• To increase speed of gear.

Name the Fixed Oils.

• Neats-foot oil and whale oil.

• Olive, cottonseed and peanut oil.

• Castor, olive and neats-foot oil.

• Coconut, olive and lard oil.

Viscosity of oil decreases with increase of temperature. For what purpose the viscosity of index for a given oil always includes the temperature of the oil when viscosity was measured?

• To measure the lubrication of the bearing

• To measure the wear and tear of the bearing

• To measure the amount of heat produced in the bearing

• To measure the acceptable load capacity of the bearing

What is the effect of an increase in the oil pressure within a bearing?

• It increases the viscosity of the oil.

• It decreases the load carrying ability of the oil.

• It reduces the oil’s internal friction loss.

• It improves the flow into close tolerances

When selecting a lubricant for a specific bearing, what is one of the conditions laid out by the manufacturer?

• The viscosity of the oil should be high

• The lubricant should not be sophisticated

• The speed of the journal should be low

• The load should be low

What type of lubrication is used for slow speed, heavily loaded bearings?

• Linseed oil

• Ester oil

• Grease lubricant

• Mineral oil

What is the effect of improperly lubricating a ring lubricated bearing?

• The bearing may turn too slowly or not at all.

• The bearing may not be able to carry a sufficient amount of the thin lubricant

• Damage may be caused to the bearing journal

• All of the above

What is the reason for lubricating an anti-friction bearing?

• To reduce friction between the moving parts.

• To avoid rust and corrosion within the bearing.

• To maintain pressure within the bearing.

• To ensure that the bearing is not overloaded.

Which of the following is the disadvantage of over-filling a grease filled bearing?

• Heat production.

• Leaks around the shaft.

• Difficult journal bearing.

• Difficult coupling bearing.

What is a general rule while lubricating an anti-friction bearing?

• Fill the housing only ½ full when using grease.

• Fill only to the gauge mark when using oil.

• Fill nearly full the housing with grease to protect against contamination

• All of the above