OVERHEAD CRANE UPDATED EXAMS ACTUAL
QUESTIONS AND ANSWERS SURE A+
✔✔What are causes of crushed strands in wire rope? - ✔✔-Too many layers of rope
wrapped on a drum, and
-Cross winding
✔✔Cross winding is a result of - ✔✔Poor winding procedures when the rope is wound in
a pile in the middle of the drum.
✔✔In relation to overhead cranes, what is dynamic lowering? - ✔✔2 systems used to
prevent heavy loads from lowering too fast. Both are automatic.
One method is a mechanical load brake built into the drum mechanism to limit the
maximum lowering speed of the motor under any condition, and
The other dynamic lowering method is electrical. It is an automatic feature of the
controller which drives the empty hook or non-overhauling load down, and holds back a
heavy, overhauling load.
✔✔Overhead cranes with more than one hoisting unit shall have- - ✔✔Each hoist shall
have its rated load marked on it or its load block, and this marking shall be clearly
legible from the ground floor.
, ✔✔The rated load of a crane shall be - ✔✔Plainly marked on each side of the crane.
✔✔An "E" (emergency) Stop switch is - ✔✔A switch which is a manually or
automatically operated electric switch to cut off electric power independently of the
regular operating controls.
-it removes power to the ENTIRE crane.
✔✔How often does OSHA require a WRITTEN wire rope inspection? - ✔✔Once a
month.
-a thorough inspection of all ropes shall be made at least once a month, and a
certification record including the date, signature of person inspecting, and an identifier of
the ropes inspected SHALL be kept on file where readily available to appointed
personnel.
✔✔Most loads should be loaded within how many degrees of level? - ✔✔5 degrees
✔✔According to ASME B30.2, what is the safety factor for rigging? - ✔✔5:1 for all
rigging—except chain, which is 4:1
✔✔The safety factor for rigging on elevators is - ✔✔20:1
✔✔Critical lifts, with a danger to personnel, should be calculated using a safety factor of
- ✔✔10:1
✔✔According to OSHA, when shall frequent inspections be performed? - ✔✔Daily to
monthly intervals.
-items shall be inspected for defects, at intervals or as specifically indicated, including
observation during operation for any defects which might appear between regular
inspections. All deficiencies shall be carefully examined and determination made as to
whether they constitute a safety hazard.
✔✔According to ASME B30.2, a frequent inspection must be preformed by a -
✔✔Designated person.
-Any deficiencies identified shall be examined by a qualified person, and a
determination made as to whether they constitute a hazard, and if a more detailed
inspection is required.
✔✔According to ASME B30.2, a frequent inspection is required: - ✔✔-Monthly for
normal service.
-Weekly to monthly for heavy service.
-Daily to weekly for severe service.
QUESTIONS AND ANSWERS SURE A+
✔✔What are causes of crushed strands in wire rope? - ✔✔-Too many layers of rope
wrapped on a drum, and
-Cross winding
✔✔Cross winding is a result of - ✔✔Poor winding procedures when the rope is wound in
a pile in the middle of the drum.
✔✔In relation to overhead cranes, what is dynamic lowering? - ✔✔2 systems used to
prevent heavy loads from lowering too fast. Both are automatic.
One method is a mechanical load brake built into the drum mechanism to limit the
maximum lowering speed of the motor under any condition, and
The other dynamic lowering method is electrical. It is an automatic feature of the
controller which drives the empty hook or non-overhauling load down, and holds back a
heavy, overhauling load.
✔✔Overhead cranes with more than one hoisting unit shall have- - ✔✔Each hoist shall
have its rated load marked on it or its load block, and this marking shall be clearly
legible from the ground floor.
, ✔✔The rated load of a crane shall be - ✔✔Plainly marked on each side of the crane.
✔✔An "E" (emergency) Stop switch is - ✔✔A switch which is a manually or
automatically operated electric switch to cut off electric power independently of the
regular operating controls.
-it removes power to the ENTIRE crane.
✔✔How often does OSHA require a WRITTEN wire rope inspection? - ✔✔Once a
month.
-a thorough inspection of all ropes shall be made at least once a month, and a
certification record including the date, signature of person inspecting, and an identifier of
the ropes inspected SHALL be kept on file where readily available to appointed
personnel.
✔✔Most loads should be loaded within how many degrees of level? - ✔✔5 degrees
✔✔According to ASME B30.2, what is the safety factor for rigging? - ✔✔5:1 for all
rigging—except chain, which is 4:1
✔✔The safety factor for rigging on elevators is - ✔✔20:1
✔✔Critical lifts, with a danger to personnel, should be calculated using a safety factor of
- ✔✔10:1
✔✔According to OSHA, when shall frequent inspections be performed? - ✔✔Daily to
monthly intervals.
-items shall be inspected for defects, at intervals or as specifically indicated, including
observation during operation for any defects which might appear between regular
inspections. All deficiencies shall be carefully examined and determination made as to
whether they constitute a safety hazard.
✔✔According to ASME B30.2, a frequent inspection must be preformed by a -
✔✔Designated person.
-Any deficiencies identified shall be examined by a qualified person, and a
determination made as to whether they constitute a hazard, and if a more detailed
inspection is required.
✔✔According to ASME B30.2, a frequent inspection is required: - ✔✔-Monthly for
normal service.
-Weekly to monthly for heavy service.
-Daily to weekly for severe service.
