TSSA 4th class B Test UPDATED ACTUAL Exam Questions and CORRECT Answers

TSSA 4th class B Test UPDATED ACTUAL
Exam Questions and CORRECT Answers
Unit 1 Lubrication and bearings - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT ANSWER - a. Fluid film lubrication