Mobile Crane Questions Test #8
Questions and Answers 100% Verified
What is the greatest cause of fatalities in crane related accidents? - ANSWER - Crew members
killed from electrocution during contact with powerlines.
Which is the following is not a characteristic of polypropylene tag line? - ANSWER - Strongest
rope available.
Which of the two methods shown is CORRECT when winding wire rope onto a drum? -
ANSWER - A
What is the signal person directing the operator to do with fist in front of chest and the thumb
tapping chest? - ANSWER - Telescope boom out,
According to OSHA, which of the following is NOT required for a monthly crane inspection? -
ANSWER - Checking the fluid in the differential.
You are operating a crane, slowly hoisting a steel I-beam off a truck. The cranes LMI shows you
are at 75% capacity and the beam is still resting on the truck, according to OSHA
1926.14179(o)(3)(ii), what is the proper procedure you must follow? - ANSWER - Stop the lift
and verify the weight of the beam with the foreman.
According to OSHA 1926.251, how much length must there be between splices or end fittings
on slings? - ANSWER - 10 rope diameters.
What effect can this procedure have on the sling? - ANSWER - Create a low choke angle and
lessen capacity.
T/F A double wrap basket hitch has twice the capacity of a basket hitch? - ANSWER - False
You are operating the mobile crane pictured with the outriggers configured as shown and you
are using the manufacturers correct specified load chart. What issue might still be a concern if
, you swing the boom over the fully extended side and start working in this area - ANSWER -
Backward stability.
Which of the following would be the BEST method to prevent sheave damage when placing
boom tip on the ground? - ANSWER - Place wood blocking behind sheaves or sheave guards to
elevate off the ground.
When operating a crane, which of the following would NOT be an effect of using a hoist hook
with no overhaul weight? - ANSWER - The rope winding unevenly on the drum with gaps.
Your are working in a manbasket being held up by a mobile crane and the wind begins to blow
over 20 mph, what should you do? - ANSWER - Discuss the situation with the operator and/or
foreman to determine if it's safe to keep working.
What is the definition of "REEVING"? - ANSWER - The process in which wire rope is arranged
through sheave blocks to gain mechanical advantage for lifting.
When lifting personnel platforms, which of the following items are NOT allowed to be part of the
wire rope bridle and associated rigging used to lift the platform? (OSHA) - ANSWER - Hooks
and non-locking spring activated latches.
You are operating a lattice boom truck crane that is properly setup with no front outrigger, as you
swing the load over the front, the combined center of gravity of the carrier and the upperworks
will move which way? - ANSWER - Closer to the tipping axis.
According to OSHA 1926.1410(d), which of the following is NOT an essential element required
when operating a mobile crane closer than the minimum clearance distance of a powerline? -
ANSWER - Rotation resistant running rope installed on all hoist drums.
When swinging a heavy load 360º with a mobile crane, what part of the ground will feel the
greatest increase in pressure? - ANSWER - The ground under the outrigger directly between
the load and the center of rotation.
Which of the following factors would NOT be used to determine parts of line? - ANSWER -
Weight of erected jib.
Questions and Answers 100% Verified
What is the greatest cause of fatalities in crane related accidents? - ANSWER - Crew members
killed from electrocution during contact with powerlines.
Which is the following is not a characteristic of polypropylene tag line? - ANSWER - Strongest
rope available.
Which of the two methods shown is CORRECT when winding wire rope onto a drum? -
ANSWER - A
What is the signal person directing the operator to do with fist in front of chest and the thumb
tapping chest? - ANSWER - Telescope boom out,
According to OSHA, which of the following is NOT required for a monthly crane inspection? -
ANSWER - Checking the fluid in the differential.
You are operating a crane, slowly hoisting a steel I-beam off a truck. The cranes LMI shows you
are at 75% capacity and the beam is still resting on the truck, according to OSHA
1926.14179(o)(3)(ii), what is the proper procedure you must follow? - ANSWER - Stop the lift
and verify the weight of the beam with the foreman.
According to OSHA 1926.251, how much length must there be between splices or end fittings
on slings? - ANSWER - 10 rope diameters.
What effect can this procedure have on the sling? - ANSWER - Create a low choke angle and
lessen capacity.
T/F A double wrap basket hitch has twice the capacity of a basket hitch? - ANSWER - False
You are operating the mobile crane pictured with the outriggers configured as shown and you
are using the manufacturers correct specified load chart. What issue might still be a concern if
, you swing the boom over the fully extended side and start working in this area - ANSWER -
Backward stability.
Which of the following would be the BEST method to prevent sheave damage when placing
boom tip on the ground? - ANSWER - Place wood blocking behind sheaves or sheave guards to
elevate off the ground.
When operating a crane, which of the following would NOT be an effect of using a hoist hook
with no overhaul weight? - ANSWER - The rope winding unevenly on the drum with gaps.
Your are working in a manbasket being held up by a mobile crane and the wind begins to blow
over 20 mph, what should you do? - ANSWER - Discuss the situation with the operator and/or
foreman to determine if it's safe to keep working.
What is the definition of "REEVING"? - ANSWER - The process in which wire rope is arranged
through sheave blocks to gain mechanical advantage for lifting.
When lifting personnel platforms, which of the following items are NOT allowed to be part of the
wire rope bridle and associated rigging used to lift the platform? (OSHA) - ANSWER - Hooks
and non-locking spring activated latches.
You are operating a lattice boom truck crane that is properly setup with no front outrigger, as you
swing the load over the front, the combined center of gravity of the carrier and the upperworks
will move which way? - ANSWER - Closer to the tipping axis.
According to OSHA 1926.1410(d), which of the following is NOT an essential element required
when operating a mobile crane closer than the minimum clearance distance of a powerline? -
ANSWER - Rotation resistant running rope installed on all hoist drums.
When swinging a heavy load 360º with a mobile crane, what part of the ground will feel the
greatest increase in pressure? - ANSWER - The ground under the outrigger directly between
the load and the center of rotation.
Which of the following factors would NOT be used to determine parts of line? - ANSWER -
Weight of erected jib.
