R4B01-01-02-08 All semi-solid lubricants:
Select one:
a. Have a low viscosity
b. Are capable of sealing out dirt and water from bearings
c. Contain
... [Show More] graphite
d. Resist moisture - ✔✔ B
R4B01-01-03-18 Which type of oil produces higher fluid friction?
Select one:
a. High viscosity oil
b. Low viscosity oil
c. Synthetic oils
d. Fixed oils - ✔✔ A
R4B01-02-04-17 When replacing or removing an anti-friction ball bearing, the applied force should:
Select one:
a. Not be transmitted through the bearing balls
b. Always be against the inner race
c. Always be against the outer race
d. Be made only after heating the bearing - ✔✔ A
R4B01-01-03-17 If an oil must flow at a very low temperature, it must have the following additive:
Select one:
a. Viscosity index improver
b. Pour point depressant
c. Dispersant
d. Floc point improver - ✔✔ B
R4B01-01-03-14 The oil for a refrigeration compressor must:
Select one:
a. Have a low pour point
b. Have a high flash point
c. Have a high fire point
d. Be a multi-grade type - ✔✔ A
R4B01-02-03-12 A thrust bearing which does not utilize the oil wedge principle of lubrication is the:
Select one:
a. Michell type
b. Collar type
c. Radial type
d. Kingsbury type - ✔✔ B
R4B01-01-02-11 The _____ number of oil indicates the acidity of oil.
Select one:
a. Acidity
b. Alkalinity
c. Neutralization
d. Viscosity index - ✔✔ C
R4B01-01-03-22 Air compressor oil should:
Select one:
a. Have a very low viscosity
b. Have low carbon residue
c. Have a low flash point
d. Not contain anti-oxidants - ✔✔ B
R4B01-02-02-04 A journal bearing:
Select one:
a. Controls thrust movement
b. Does not require lubrication
c. require cooling water
d. Supports a shaft - ✔✔ D
R4B01-02-05-21 Applying installation forces through the balls of a bearing can cause:
Select one:
a. Bearing misalignment
b. too large an air gap
c. Cracking or breaking of the balls
d. Brinelling - ✔✔ D
R4B01-02-03-10 A type of anti-friction bearing is the _____ .
Select one:
a. Kingsbury
b. Ball bearing
c. Sleeve bearing
d. Journal bearing - ✔✔ B
R4B01-02-04-16 When grease is used in an antifriction bearing after cleaning, the bearing housing should not be filled _____ full.
Select one:
a. more than 1/3
b. more than 1/2
c. more than 3/4
d. less than completely - ✔✔ A
4B01-02-02-06 The groove that is cut in the top half in the lining of a shell bearing should not extend closer to the ends than:
Select one:
a. 3 mm
b. 10 mm
c. 1.25 cm
d. 1.7 cm - ✔✔ C
R4B01-01-02-04 The kind of grease used for heavily loaded machinery operating at slow speeds is the:
Select one:
a. Sodium base grease
b. Specialty grease
c. Calcium base grease
d. Aluminum base grease - ✔✔ B [Show Less]