Overhead Crane Test Prep (New 2023/ 2024 Update) Questions and Verified Answers| 100% Correct
Overhead Crane Test Prep (New 2023/ 2024
Update) Questions and Verified Answers|
100% Correct
QUESTION
what components shall be provided for outdoor bridge cranes?
Answer:
rail clamps and wind indicator
QUESTION
what type of fire extinguisher should NOT be used?
Answer:
carbon tetrachloride
QUESTION
what procedures are used when the load approaches near or over personel?
Answer:
A warning signal shall be sounded
QUESTION
what is a hoist limit switch that is operated when the load block hits a lever pulling contacts
apart interrupting the hoist and circuit?
Answer:
the paddle type
QUESTION
what is a hoist limit switch that is attached to a shaft in the hoisting mechanism?
Answer:
the rotating gear type
QUESTION
what are the three basic types of hoist limit switches?
Answer:
- the paddle type
- the weight switch
- the rotating gear type
QUESTION
what must be checked when lifting a heavy load?
Answer:
the hoist brake
QUESTION
when lowering a heavy load, it is recommended NOT to use what speed?
Answer:
2nd, 3rd, or 4th
QUESTION
as the numbers increase, will the speed increase or decrease?
Answer:
increase
QUESTION
by pulling the lever backwards, what will the hook do?
Answer:
the hook will raise
QUESTION
by pushing the lever forward, what will the hook do?
Answer:
the hook will lower
QUESTION
what capacity rating does a sister hook usually have?
Answer:
over 60 tons
QUESTION
what capacity rating does a single hook usually have?
Answer:
up to 60 tons
QUESTION
wire rope has a safety factor of what?
Answer:
5 to 1
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hat are the rails that are attached to the building columns on either side of the bay?
runways
what is it called when the girders are not perpendicular to the runway rails?
skewing
what is the use of reverse motor power to stop a forward moving load?
plugging
what is the term used to indicate very short movement?
inching
what are the power cables that are hung in drape curves on the crane called?
festoon
what kind of braking uses Eddy current braking?
dynamic
what kind of brakes are applied mechanically when the hoist is not powered?
electrical
what kind of a brake uses foot pressire on a pedal?
mechanical
what are the 3 types of crane braking?
mechanical, electrical, dynamic
what is located on both sides of the bridge and trolley to prevent over travel?
bumpers
how many wraps must be on a drum when the load block is at its lowest position?
2 wraps
what are the girders that are connected on each side of the bay that sits on the runway called?
the bridge
ANSI standard for overhead cranes?
B30.2
what should be done before lifting the load?
determine the weight of the load
A hoist limit switch is triggered when the block contacts and raises the weight, what is suspended from the counterweighted limit switch?
the weighted switch
when should limit switches be checked?
the beginning of each shift
operating the trolley over long distnaces with intermediate speeds may do what?
heat up the motor
whenever possible you should keep one hand on what?
the hoist
If you accelerate and stop gradually what does this avoid?
excessive draft
on a three light system, what does the RED light indicate?
- Crane is not to be moved under any circumstances
- Crane is not manned
- Crane is out of service
on a three light system, what does the GREEN light mean?
- Crane is operational
- Crane is manned
- Operator must be in cab
What is the working range for a radio reception?
120 to 160 ft
what kind of service operates at LESS than 85% of the rated load with no more than 10 lifts an hour?
normal service
on a hook block on an overhead crane, the hook may have how much twist and how much opening?
10 degree body twist
15% opening
what are the 3 motors that drive a standard overhead crane?
- Bridge
- Trolley
- Hoist
what should be done before loading or unloading a crane?
centering
How do you secure an overhead crane?
- Park the crane at an authorized platform
- Secure the trolley next to the cab
- Raise the hoist block just below limit switch.
- Position controls to the off position
- Open Mon switch
- Turn on red light
- Put on parking brake
what kind of service is operating at 85% of the rated load and OVER 10 lifts per hour?
heavy service
what is position 1 used for on the hoist controller?
unloaded hook
what is position 3 on the hoist controller used for?
smooth start on heavy loads
what is position 2 used for on the hoist controller?
smooth start of medium loads
what is the OSHA standard for overhead cranes?
1910.179
what components shall be provided for outdoor bridge cranes?
rail clamps and wind indicator
what type of fire extinguisher should NOT be used?
carbon tetrachloride
what procedures are used when the load approaches near or over personel?
A warning signal shall be sounded
what is a hoist limit switch that is operated when the load block hits a lever pulling contacts apart interrupting the hoist and circuit?
the paddle type
what is a hoist limit switch that is attached to a shaft in the hoisting mechanism?
the rotating gear type
what are the three basic types of hoist limit switches?
- the paddle type
- the weight switch
- the rotating gear type
what must be checked when lifting a heavy load?
the hoist brake
when lowering a heavy load, it is recommended NOT to use what speed?
2nd, 3rd, or 4th
as the numbers increase, will the speed increase or decrease?
increase
by pulling the lever backwards, what will the hook do?
the hook will raise
by pushing the lever forward, what will the hook do?
the hook will lower
what capacity rating does a sister hook usually have?
over 60 tons
what capacity rating does a single hook usually have?
up to 60 tons
wire rope has a safety factor of what?
5 to 1
what does the hoist consist of?
- Hoist motor
- Speed reducer
- Hoist brake
- Drum
- Wire rope
- Hoist block
- Hook
what kind of service happens under abnormal operating conditions when dealing with a normal or heavy service?
servere service