Mobile Crane Questions Test #6 UPDATED
ACTUAL Exam Questions and CORRECT
Answers
What action does a signal person intend the operator to perform if he extends his arm at shoulder
height, makes a fist with his hand, and sticks his thumb up? - CORRECT ANSWER Boom
up.
Within what percentage of level does a telescopic boom crane have to be for the gross ratings in
the load chart to remain valid? - CORRECT ANSWER 1%.
The load line of the crane you 're operating comes into contact with an energized power line.
There's no sign of any other danger, such as fire. In such a situation, you should: - CORRECT
ANSWER Stay in the cab until the lines are de-energized.
You're setting your crane up in a confined area and you cannot fully extend your fourth
outrigger. Your crane does not have a load chart for intermediate extension working. In such a
situation you should use the capacities in the: - CORRECT ANSWER On-rubber load
chart.
According to the 830.5 mobile crane standard, how many randomly distributed broken wires in
rotation-resistant rope are cause for considering replacement of the rope? - CORRECT
ANSWER 2 broken wires in 6 rope diameters.
Unless the manufacturer states otherwise, the net capacity of a crane on main boom is the
capacity listed in the load chart: - CORRECT ANSWER Minus the weight of the rigging
and all attachments.
Unless the operator takes account of boom deflection, when lifted off the ground, a properly
rigged load may: - CORRECT ANSWER Swing out away from the crane.
, Which is the most common cause of death to crane operators? - CORRECT
ANSWER Crane turnover.
According to the B30.5 mobile crane standard, it's OK for an operator to leave the cab of a crane
with the engine running so long as: - CORRECT ANSWER The operator keeps the crane
in view and restricts access to the area-around the crane.
An operator should respond to a "stop" signal from: - CORRECT ANSWER Anyone .
Unless the manufacturer states otherwise, truck cranes generally have no lifting capacity over
which area? - CORRECT ANSWER The front.
Working radius" is defined as the distance from the: - CORRECT ANSWER Center of
rotation of the crane to the center of gravity of the load.
If the bold line is shown on a load chart, the capacities below the line: - CORRECT
ANSWER Are based on the stability of the crane.
Rough terrain crane capacities are generally greater over the: - CORRECT
ANSWER Front.
According to federal requirements, under what conditions is it OK for a person to ride the
headache ball? - CORRECT ANSWER It is never OK.
On duty cycle operations, such as skipping concrete, most manufacturers require a crane's load
chart capacity to be reduced by: - CORRECT ANSWER 20%.
Boom length is measured from the: - CORRECT ANSWER Boom hinge pins to the center
of the boom tip sheave.
ACTUAL Exam Questions and CORRECT
Answers
What action does a signal person intend the operator to perform if he extends his arm at shoulder
height, makes a fist with his hand, and sticks his thumb up? - CORRECT ANSWER Boom
up.
Within what percentage of level does a telescopic boom crane have to be for the gross ratings in
the load chart to remain valid? - CORRECT ANSWER 1%.
The load line of the crane you 're operating comes into contact with an energized power line.
There's no sign of any other danger, such as fire. In such a situation, you should: - CORRECT
ANSWER Stay in the cab until the lines are de-energized.
You're setting your crane up in a confined area and you cannot fully extend your fourth
outrigger. Your crane does not have a load chart for intermediate extension working. In such a
situation you should use the capacities in the: - CORRECT ANSWER On-rubber load
chart.
According to the 830.5 mobile crane standard, how many randomly distributed broken wires in
rotation-resistant rope are cause for considering replacement of the rope? - CORRECT
ANSWER 2 broken wires in 6 rope diameters.
Unless the manufacturer states otherwise, the net capacity of a crane on main boom is the
capacity listed in the load chart: - CORRECT ANSWER Minus the weight of the rigging
and all attachments.
Unless the operator takes account of boom deflection, when lifted off the ground, a properly
rigged load may: - CORRECT ANSWER Swing out away from the crane.
, Which is the most common cause of death to crane operators? - CORRECT
ANSWER Crane turnover.
According to the B30.5 mobile crane standard, it's OK for an operator to leave the cab of a crane
with the engine running so long as: - CORRECT ANSWER The operator keeps the crane
in view and restricts access to the area-around the crane.
An operator should respond to a "stop" signal from: - CORRECT ANSWER Anyone .
Unless the manufacturer states otherwise, truck cranes generally have no lifting capacity over
which area? - CORRECT ANSWER The front.
Working radius" is defined as the distance from the: - CORRECT ANSWER Center of
rotation of the crane to the center of gravity of the load.
If the bold line is shown on a load chart, the capacities below the line: - CORRECT
ANSWER Are based on the stability of the crane.
Rough terrain crane capacities are generally greater over the: - CORRECT
ANSWER Front.
According to federal requirements, under what conditions is it OK for a person to ride the
headache ball? - CORRECT ANSWER It is never OK.
On duty cycle operations, such as skipping concrete, most manufacturers require a crane's load
chart capacity to be reduced by: - CORRECT ANSWER 20%.
Boom length is measured from the: - CORRECT ANSWER Boom hinge pins to the center
of the boom tip sheave.
