TSSA 4th class B Test with questions
and well verified answers actual
exam!!! 2026
Unit 1 Lubrication and bearings - ANSWER -
Large journal or sleeve bearings have grooves:
Select one:
a. In the non-pressure area
b. For distributing lubricant evenly just after the pressure area
c. Cut into the bearing housing
d. In the high pressure area of the bearing babbit - ANSWER -In the non-pressure area
A collar thrust bearing:
Select one:
a. Has boundary lubrication
b. Is used with steam turbines only
c. Is an anti-friction type bearing
d. Can support more load than a Michell thrust bearing - ANSWER -a. Has boundary
lubrication
A material that is commonly used as a solid lubricant is:
Select one:
a. Tallow
,b. Lime
c. Molybdenum disulfide
d. Sodium carbonate - ANSWER -c. Molybdenum disulfide
A normal anti-friction bearing temperature operating range is:
Select one:
a. 80°C to 120°C
b. 20°C to 50°C
c. 65°C to 70°C
d. 150°C to 160°C - ANSWER -65°C to 70°C
Lubricants used for high-output steam turbines should:
Select one:
a. Mix well with water
b. Have a low pour point
c. Be fire resistant
d. Have a very high viscosity - ANSWER -c. Be fire resistant
All semi-solid lubricants:
Select one:
a. Have a low viscosity
b. Are capable of sealing out dirt and water from bearings
c. Contain graphite
d. Resist moisture - ANSWER -b. Are capable of sealing out dirt and water from bearings
Which of the following has the greatest effect on the viscosity of lubrication oil?
Select one:
a. Pressure
b. Load
c. Temperature
d. Speed - ANSWER -c. Temperature
,Applying installation forces through the balls of a bearing can cause:
Select one:
a. Brinelling
b. Cracking or breaking of the balls
c. too large an air gap
d. Bearing misalignment - ANSWER -a. Brinelling
If an oil must flow at a very low temperature[comma] it must have the following additive:
Select one:
a. Viscosity index improver
b. Pour point depressant
c. Dispersant
d. Floc point improver - ANSWER -b. Pour point depressant
The oil for a refrigeration compressor must:
Select one:
a. Be a multi-grade type
b. Have a high fire point
c. Have a high flash point
d. Have a low pour point - ANSWER -d. Have a low pour point
The characteristics of a grease are determined by:
Select one:
a. Its thickening agent or €œsoap€
b. Its consistency
c. The type of oil used in the grease
d. Its protective coating - ANSWER -a. Its thickening agent or €œsoap€
If ambient air temperatures are very low[comma] the preferred lubricant is a:
Select one:
, a. Solid
b. Semi-solid
c. Fixed oil
d. Liquid - ANSWER -a. Solid
A common cause of antifriction bearing failure is:
Select one:
a. Shaft misalignment
b. Drive motor overload
c. Extreme cold temperature cracking
d. High RPM service - ANSWER -a. Shaft misalignment
The cheapest and most commonly used grease is:
Select one:
a. Sulphate base
b. Lime base
c. Chlorine base
d. Potassium base - ANSWER -b. Lime base
A form of lubrication that requires continual motion of a shaft or surface is:
Select one:
a. Fluid film lubrication
b. Forced lubrication
c. Continuous lubrication
d. Boundary lubrication - ANSWER -a. Fluid film lubrication
The ability of an oil to lift and support heavy loads depends upon:
Select one:
a. Pour point
b. acceleration
c. Hydraulic pressure
and well verified answers actual
exam!!! 2026
Unit 1 Lubrication and bearings - ANSWER -
Large journal or sleeve bearings have grooves:
Select one:
a. In the non-pressure area
b. For distributing lubricant evenly just after the pressure area
c. Cut into the bearing housing
d. In the high pressure area of the bearing babbit - ANSWER -In the non-pressure area
A collar thrust bearing:
Select one:
a. Has boundary lubrication
b. Is used with steam turbines only
c. Is an anti-friction type bearing
d. Can support more load than a Michell thrust bearing - ANSWER -a. Has boundary
lubrication
A material that is commonly used as a solid lubricant is:
Select one:
a. Tallow
,b. Lime
c. Molybdenum disulfide
d. Sodium carbonate - ANSWER -c. Molybdenum disulfide
A normal anti-friction bearing temperature operating range is:
Select one:
a. 80°C to 120°C
b. 20°C to 50°C
c. 65°C to 70°C
d. 150°C to 160°C - ANSWER -65°C to 70°C
Lubricants used for high-output steam turbines should:
Select one:
a. Mix well with water
b. Have a low pour point
c. Be fire resistant
d. Have a very high viscosity - ANSWER -c. Be fire resistant
All semi-solid lubricants:
Select one:
a. Have a low viscosity
b. Are capable of sealing out dirt and water from bearings
c. Contain graphite
d. Resist moisture - ANSWER -b. Are capable of sealing out dirt and water from bearings
Which of the following has the greatest effect on the viscosity of lubrication oil?
Select one:
a. Pressure
b. Load
c. Temperature
d. Speed - ANSWER -c. Temperature
,Applying installation forces through the balls of a bearing can cause:
Select one:
a. Brinelling
b. Cracking or breaking of the balls
c. too large an air gap
d. Bearing misalignment - ANSWER -a. Brinelling
If an oil must flow at a very low temperature[comma] it must have the following additive:
Select one:
a. Viscosity index improver
b. Pour point depressant
c. Dispersant
d. Floc point improver - ANSWER -b. Pour point depressant
The oil for a refrigeration compressor must:
Select one:
a. Be a multi-grade type
b. Have a high fire point
c. Have a high flash point
d. Have a low pour point - ANSWER -d. Have a low pour point
The characteristics of a grease are determined by:
Select one:
a. Its thickening agent or €œsoap€
b. Its consistency
c. The type of oil used in the grease
d. Its protective coating - ANSWER -a. Its thickening agent or €œsoap€
If ambient air temperatures are very low[comma] the preferred lubricant is a:
Select one:
, a. Solid
b. Semi-solid
c. Fixed oil
d. Liquid - ANSWER -a. Solid
A common cause of antifriction bearing failure is:
Select one:
a. Shaft misalignment
b. Drive motor overload
c. Extreme cold temperature cracking
d. High RPM service - ANSWER -a. Shaft misalignment
The cheapest and most commonly used grease is:
Select one:
a. Sulphate base
b. Lime base
c. Chlorine base
d. Potassium base - ANSWER -b. Lime base
A form of lubrication that requires continual motion of a shaft or surface is:
Select one:
a. Fluid film lubrication
b. Forced lubrication
c. Continuous lubrication
d. Boundary lubrication - ANSWER -a. Fluid film lubrication
The ability of an oil to lift and support heavy loads depends upon:
Select one:
a. Pour point
b. acceleration
c. Hydraulic pressure
