MILLWRIGHT LEVEL 3 UPDATED STUDY GUIDE
QUESTIONS AND ANSWERS SURE A+
✔✔What does the letter Z mean in a bearing code - ✔✔The bearings shielded
✔✔What do the letter RS mean in a bearing code - ✔✔Rubbing seal
✔✔What does ISO stand for - ✔✔International Organization of Standardization
✔✔What bearing setup would you use to cradle a load - ✔✔Face to Face
✔✔What type of setup you used for to support something over hung - ✔✔Back to back
✔✔What are the last 2 digits in a bearing code - ✔✔The last 2 digits times 5 is the bore
diameter
✔✔What does the first digit in a bearing code represent - ✔✔Rolling element
✔✔What does the second digit mean in a bearing code - ✔✔Service weight
✔✔What is the process of scraping a bearing called - ✔✔Fitting
, ✔✔How much contact should you have in a Babbitt bearing - ✔✔85%
✔✔What should the width of a shaft key be - ✔✔1/4 shaft diameter
✔✔What is the taper on a taper key - ✔✔1/8" per foot
✔✔What are the 2 stresses on a shaft - ✔✔Torsional and bending
✔✔What is fatigue - ✔✔Repeated stresses
✔✔How should you stagger packing joints - ✔✔90° apart
✔✔How should set screw be spaced - ✔✔90° apart
✔✔Why are lantern rings used - ✔✔To distribute oil
✔✔How are clearances expressed in bearings - ✔✔C1-C5, C1 being the least amount
and C5 being the greatest
✔✔What can be used to cover damage on a shaft - ✔✔Speedy sleeve
✔✔What type of pillow block can take load in any direction - ✔✔Jib joint
✔✔What can you do if a clutch is slipping - ✔✔Increase pressure
✔✔What type of flow do you get when running - ✔✔Laminar flow
✔✔What would you do if a clutch is engaging to slow - ✔✔Increase flow rate
✔✔What must you make sure when using u-joints in pairs - ✔✔Both u-joints running in
phase
✔✔What pitch change does an offset link provide - ✔✔1 pitch
✔✔How long before you inspect a chain - ✔✔8 hours after install after 100 hours and
after 500 hours
✔✔How much stronger is a double strand chain then a single strand - ✔✔1.7 Times
✔✔How much longer do o-ring chains last - ✔✔10 Times
✔✔What is the most effective way to lubricate a gearbox - ✔✔Scrapers, troughs and
dams
QUESTIONS AND ANSWERS SURE A+
✔✔What does the letter Z mean in a bearing code - ✔✔The bearings shielded
✔✔What do the letter RS mean in a bearing code - ✔✔Rubbing seal
✔✔What does ISO stand for - ✔✔International Organization of Standardization
✔✔What bearing setup would you use to cradle a load - ✔✔Face to Face
✔✔What type of setup you used for to support something over hung - ✔✔Back to back
✔✔What are the last 2 digits in a bearing code - ✔✔The last 2 digits times 5 is the bore
diameter
✔✔What does the first digit in a bearing code represent - ✔✔Rolling element
✔✔What does the second digit mean in a bearing code - ✔✔Service weight
✔✔What is the process of scraping a bearing called - ✔✔Fitting
, ✔✔How much contact should you have in a Babbitt bearing - ✔✔85%
✔✔What should the width of a shaft key be - ✔✔1/4 shaft diameter
✔✔What is the taper on a taper key - ✔✔1/8" per foot
✔✔What are the 2 stresses on a shaft - ✔✔Torsional and bending
✔✔What is fatigue - ✔✔Repeated stresses
✔✔How should you stagger packing joints - ✔✔90° apart
✔✔How should set screw be spaced - ✔✔90° apart
✔✔Why are lantern rings used - ✔✔To distribute oil
✔✔How are clearances expressed in bearings - ✔✔C1-C5, C1 being the least amount
and C5 being the greatest
✔✔What can be used to cover damage on a shaft - ✔✔Speedy sleeve
✔✔What type of pillow block can take load in any direction - ✔✔Jib joint
✔✔What can you do if a clutch is slipping - ✔✔Increase pressure
✔✔What type of flow do you get when running - ✔✔Laminar flow
✔✔What would you do if a clutch is engaging to slow - ✔✔Increase flow rate
✔✔What must you make sure when using u-joints in pairs - ✔✔Both u-joints running in
phase
✔✔What pitch change does an offset link provide - ✔✔1 pitch
✔✔How long before you inspect a chain - ✔✔8 hours after install after 100 hours and
after 500 hours
✔✔How much stronger is a double strand chain then a single strand - ✔✔1.7 Times
✔✔How much longer do o-ring chains last - ✔✔10 Times
✔✔What is the most effective way to lubricate a gearbox - ✔✔Scrapers, troughs and
dams
