TSSA 4th class B Test Exam Questions With Correct Answers Newest Update 2026

TSSA 4th class B Test Exam Questions With Correct
Answers Newest Update 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 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



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

, TSSA 4th class B Test Exam Questions With Correct
Answers Newest Update 2026
d. Sodium carbonate - ANSWER---c. Molybdenum disulfide



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

, TSSA 4th class B Test Exam Questions With Correct
Answers Newest Update 2026
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

, TSSA 4th class B Test Exam Questions With Correct
Answers Newest Update 2026
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