Industrial Mechanic Millwright Study Notes and Review

Industrial Mechanic / Millwright Study Notes and Review Source : PV-T May 2010 Page 2 of 53 RIGGING 1. THE “LAY” OF THE ROPE MEANS THE ANS. DIRECTION THE WIRES AND STRANDS ROTATE 2. DEFECTIVE RIGGING COMPONENTS SHOULD BE ANS. DESTROYED 3. INSPECTION OF RIGGING EQUIPMENT SHOULD BE MADE ANS. AS OFTEN AS NECESSARY FOR SAFE OPERATION 4. THE MINIMUM ECCEPTABLE FACTOR OF SAFETY FOR WIRE ROPE IS ANS. 5.1 5. A GOOD RULE OF THUMB FOR CALCULATING THE SAFE WORKING LOAD (S.W.L.) FOR WIRE ROPE IS ANS. DIA. X DIA. X 8 = TONS 6. THE DIAMETER OF A WIRE ROPE IS MEASURED BY THE ANS. DIAMETER OF THE CIRCLE THAT CAN ENCLOSE ALL STRANDS 7. IF A WIRE ROPE HAS A CATALOUGE BREAKING STRENGTH OF 10.4 TONS, THE MAX. WORKING LOAD IS ANS. 2.08 8. THE SAFE WORKING LOAD FOR A ½” DIA. STEEL WIRE ROPE IS ANS. 2 TONS 9. BEFORE YOU MOVE AN OBJECT, YOU NEED TO KNOW ITS ANS. WEIGHT 10. PULLEYS IN A BLOCK ARE CALLED ANS. SHEAVES 11. WHAT MUST YOU KNOW ABOUT A ROPE TO PREVENT OVERLOADING ANS. ITS BREAKING STRENGTH, THE SAFETY FACTOR AND ITS SAFE WORKING LOAD