4th Class Power Engineering Part B Unit 1 – Lubrication Questions With Complete Solutions
Solid Lubricant - (ANSWER)Used for heavy loads, extreme temperatures, or both
Barium or lithium base grease - (ANSWER)A lubricant for an anti-friction bearing under high
temperature is
Graphite, Soapstone, Molybdenum disulfide, Mica and polymer films - (ANSWER)Materials commonly
used as solid lubricants
Low carbon residue - (ANSWER)Reciprocating air compressor oil should have
A large amount of cooling is desired - (ANSWER)Grease is not a suitable lubricant when
Grease - (ANSWER)Can be used under conditions where oil may leak away and leave the bearing dry, Is
less likely to drip or splash from bearings and therefore finds wide application in the textile and food
industries, Serves to seal out dirt and water from bearings, Gives the working surfaces a permanent
protective coating to prevent rusting during idle periods
Liquid lubricant and a Thickening agent - (ANSWER)Greases are a mixture of what
Low viscosity index - (ANSWER)If an oil's viscosity changes a lot with little temperature change, it will
then have a
High viscosity index - (ANSWER)If an oil's viscosity changes a small amount with temperature change, it
will then have a
Thickening agent (soap) - (ANSWER)The characteristics of good grease are largely determined by its
Lime/Calcium base - (ANSWER)The cheapest and most commonly used grease
, 4th Class Power Engineering Part B Unit 1 – Lubrication Questions With Complete Solutions
Saybolt viscometer - (ANSWER)The instrument which measures the viscosity of an oil at a certain
temperature as it flows through a small diameter tube
Reduce wear, Reduce friction - (ANSWER)Most important functions of a lubricant
Fire point - (ANSWER)The point at which oil will give off enough vapor to ignite and burn continuously
Neutralization number - (ANSWER)Indicates the acidity of oil
High viscosity oil - (ANSWER)Type of oil that produces higher fluid friction
Fire resistant - (ANSWER)High capacity steam turbine oils should be
Semi-solid or Oil - (ANSWER)Two types of lubrication that can be used for an anti-friction bearing
Semi-solid Lubricant - (ANSWER)Seals out dirt and water from bearings, Cannot be used for heat
removal, Cannot be filtered
Pour point depressants - (ANSWER)Can be added to an oil in order to make it flow at a much lower
temperature
Oil additives - (ANSWER)This product should not significantly affect all other characteristics other than
the main one it is used for
Lubricant - (ANSWER)Reduces friction, wear, and corrosion, Separates the moving parts
Intermeshing of Gear teeth - (ANSWER)Area where lubrication shock absorption is very important
Solid Lubricant - (ANSWER)Used for heavy loads, extreme temperatures, or both
Barium or lithium base grease - (ANSWER)A lubricant for an anti-friction bearing under high
temperature is
Graphite, Soapstone, Molybdenum disulfide, Mica and polymer films - (ANSWER)Materials commonly
used as solid lubricants
Low carbon residue - (ANSWER)Reciprocating air compressor oil should have
A large amount of cooling is desired - (ANSWER)Grease is not a suitable lubricant when
Grease - (ANSWER)Can be used under conditions where oil may leak away and leave the bearing dry, Is
less likely to drip or splash from bearings and therefore finds wide application in the textile and food
industries, Serves to seal out dirt and water from bearings, Gives the working surfaces a permanent
protective coating to prevent rusting during idle periods
Liquid lubricant and a Thickening agent - (ANSWER)Greases are a mixture of what
Low viscosity index - (ANSWER)If an oil's viscosity changes a lot with little temperature change, it will
then have a
High viscosity index - (ANSWER)If an oil's viscosity changes a small amount with temperature change, it
will then have a
Thickening agent (soap) - (ANSWER)The characteristics of good grease are largely determined by its
Lime/Calcium base - (ANSWER)The cheapest and most commonly used grease
, 4th Class Power Engineering Part B Unit 1 – Lubrication Questions With Complete Solutions
Saybolt viscometer - (ANSWER)The instrument which measures the viscosity of an oil at a certain
temperature as it flows through a small diameter tube
Reduce wear, Reduce friction - (ANSWER)Most important functions of a lubricant
Fire point - (ANSWER)The point at which oil will give off enough vapor to ignite and burn continuously
Neutralization number - (ANSWER)Indicates the acidity of oil
High viscosity oil - (ANSWER)Type of oil that produces higher fluid friction
Fire resistant - (ANSWER)High capacity steam turbine oils should be
Semi-solid or Oil - (ANSWER)Two types of lubrication that can be used for an anti-friction bearing
Semi-solid Lubricant - (ANSWER)Seals out dirt and water from bearings, Cannot be used for heat
removal, Cannot be filtered
Pour point depressants - (ANSWER)Can be added to an oil in order to make it flow at a much lower
temperature
Oil additives - (ANSWER)This product should not significantly affect all other characteristics other than
the main one it is used for
Lubricant - (ANSWER)Reduces friction, wear, and corrosion, Separates the moving parts
Intermeshing of Gear teeth - (ANSWER)Area where lubrication shock absorption is very important
