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Overhead Crane Exam Prep Questions and Verified ANSWERs| 100% Correct What are the rails that are attached to the building columns on either side of the bay?
ANSWER: runways
Correct; runways are the rails supporting the crane bridge.
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What is it called when the girders are not perpendicular to the runway rails?
ANSWER: skewing
Correct; skewing occurs when the crane bridge is misaligned with the runways.
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What is the use of reverse motor power to stop a forward moving load?
ANSWER: plugging
Correct; plugging uses reverse power to brake the motor.
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What is the term used to indicate very short movement?
ANSWER: inching
Correct; inching refers to precise, small movements.
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What are the power cables that are hung in drape curves on the crane called?
ANSWER: festoon
Correct; festoon cables are draped to allow crane movement.
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What kind of braking uses Eddy current braking?
ANSWER: dynamic
Correct; dynamic braking includes Eddy current methods.
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What kind of brakes are applied mechanically when the hoist is not powered?
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ANSWER: mechanical
Your input said "electrical," which seems incorrect. Mechanical brakes engage when power is off (e.g., spring-applied), per
ASME B30.2.
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What kind of a brake uses foot pressure on a pedal?
ANSWER: mechanical
Correct; a foot pedal operates a mechanical brake.
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What are the 3 types of crane braking?
ANSWER: mechanical, electrical, dynamic
Correct; these are the three primary braking types for cranes.
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What is located on both sides of the bridge and trolley to prevent over travel?
ANSWER: bumpers
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Correct; bumpers limit travel and absorb impact.
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How many wraps must be on a drum when the load block is at its lowest position?
ANSWER: 2 wraps
Correct per ASME B30.2; at least 2 wraps ensure safety.
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What are the girders that are connected on each side of the bay that sits on the runway called?
ANSWER: the bridge
Correct; the bridge spans the bay and rides on the runways.
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ANSI standard for overhead cranes?
ANSWER: B30.2
Correct; ASME B30.2 governs overhead and gantry cranes.