Mobile Crane Operator Core
Review Questions with Verified
Solutions.,
1. 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/her thumb up?
a. Boom down
b. Swing
c. Boom up
d. Extend boom - CORRECT ANSWER>>c.
2. When hoisting personnel, within what percentage of level must a telescopic
boom crane be in order for the gross ratings in the load chart to remain valid?
a. 1%
b. 2%
c. 5%
d. 8% - CORRECT ANSWER>>a.
3. The load line of the crane you're operating contacts an energized power line.
There's no sign of any other danger, such as fire. What should you do?
a. Climb down carefully from the crane cab
b. Jump down, feet together
c. Stay in the cab until the lines are de-energized
d. Get as far away from the crane as possible - CORRECT ANSWER>>c.
4. According to OSHA 1926.1413, how many randomly distributed broken wires in
rotation-resistant rope are cause for replacement of the rope?
a. 1 broken wire in 6 rope diameters
b. 2 broken wires in 30 rope diameters
c. 3 broken wires in one strand in one lay
d. 2 broken wires in 6 rope diameters - CORRECT ANSWER>>d.
5. What is the net capacity of a crane on main boom unless the manufacturer states
otherwise?
a. The capacity listed in the load chart minus the weight of the rigging and all
attachments
, b. The capacity listed in the load chart plus the weight of the rigging and all
attachments
c. The capacity listed in the load chart minus the weight of the rigging and all
attachments not in use
d. The capacity listed in the load chart minus the weight of the rigging alone -
CORRECT ANSWER>>a.
6. What may happen to a properly rigged load when lifted off the ground unless the
operator takes account of boom deflection?
a. It could swing out away from the crane
b. It could swing in towards the crane
c. It could raise absolutely vertically
d. It could shift in its rigging - CORRECT ANSWER>>a.
7. What Standard Method hand signal is being illustrated?
a. Swing
b. Stop
c. Emergency Stop
d. Travel - CORRECT ANSWER>>a.
8. Who should an operator respond to a "stop" signal from?
a. Appointed signal person only
b. Project manager only
c. Superintendent only
d. Anyone - CORRECT ANSWER>>d.
9. Which area do truck cranes without a 5th outrigger generally have no lifting
capacity unless the manufacturer states otherwise?
a. The side
b. The rear
c. The front
d. The outriggers - CORRECT ANSWER>>c.
10. What is the definition of "operating radius?"
a. The distance from the base of the boom to the center of the load b. The distance
from the front of the crane to the center of gravity of the load
c. The distance from the center of rotation of the crane to the center of the load
Review Questions with Verified
Solutions.,
1. 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/her thumb up?
a. Boom down
b. Swing
c. Boom up
d. Extend boom - CORRECT ANSWER>>c.
2. When hoisting personnel, within what percentage of level must a telescopic
boom crane be in order for the gross ratings in the load chart to remain valid?
a. 1%
b. 2%
c. 5%
d. 8% - CORRECT ANSWER>>a.
3. The load line of the crane you're operating contacts an energized power line.
There's no sign of any other danger, such as fire. What should you do?
a. Climb down carefully from the crane cab
b. Jump down, feet together
c. Stay in the cab until the lines are de-energized
d. Get as far away from the crane as possible - CORRECT ANSWER>>c.
4. According to OSHA 1926.1413, how many randomly distributed broken wires in
rotation-resistant rope are cause for replacement of the rope?
a. 1 broken wire in 6 rope diameters
b. 2 broken wires in 30 rope diameters
c. 3 broken wires in one strand in one lay
d. 2 broken wires in 6 rope diameters - CORRECT ANSWER>>d.
5. What is the net capacity of a crane on main boom unless the manufacturer states
otherwise?
a. The capacity listed in the load chart minus the weight of the rigging and all
attachments
, b. The capacity listed in the load chart plus the weight of the rigging and all
attachments
c. The capacity listed in the load chart minus the weight of the rigging and all
attachments not in use
d. The capacity listed in the load chart minus the weight of the rigging alone -
CORRECT ANSWER>>a.
6. What may happen to a properly rigged load when lifted off the ground unless the
operator takes account of boom deflection?
a. It could swing out away from the crane
b. It could swing in towards the crane
c. It could raise absolutely vertically
d. It could shift in its rigging - CORRECT ANSWER>>a.
7. What Standard Method hand signal is being illustrated?
a. Swing
b. Stop
c. Emergency Stop
d. Travel - CORRECT ANSWER>>a.
8. Who should an operator respond to a "stop" signal from?
a. Appointed signal person only
b. Project manager only
c. Superintendent only
d. Anyone - CORRECT ANSWER>>d.
9. Which area do truck cranes without a 5th outrigger generally have no lifting
capacity unless the manufacturer states otherwise?
a. The side
b. The rear
c. The front
d. The outriggers - CORRECT ANSWER>>c.
10. What is the definition of "operating radius?"
a. The distance from the base of the boom to the center of the load b. The distance
from the front of the crane to the center of gravity of the load
c. The distance from the center of rotation of the crane to the center of the load
