NCCCO MOBILE CRANE QUESTIONS & ANSWERS
CORRECT 100%
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 - 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% - ANSWER a.
,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 - 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
d. The distance from the center of rotation of the crane to the center of gravity of the load - ANSWER d.
11. What applies to the capacities below the bold line shown on a load chart?
a. They are based on the structural strength of the crane
b. They must not be used
c. They are based on the stability of the crane
, d. They should only be used if the crane is set up on outriggers - ANSWER c.
12. In which quadrant are rough terrain crane capacities generally greater?
a. Over the front
b. Over the rear
c. Over the right side
d. Over the left side - ANSWER a.
13. According to federal requirements, under what conditions is it okay for a person to ride the headache ball?
a. When there is no other way to gain access
b. When the lift has been approved by an engineer
c. When other means would be more dangerous
d. It is never okay - ANSWER d.
14. By what percentage do most manufacturers require a crane's load chart capacity to be reduced by for duty
cycle operations such as high-volume concrete placement?
a. 10%.
b. 15%.
CORRECT 100%
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 - 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% - ANSWER a.
,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 - 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
d. The distance from the center of rotation of the crane to the center of gravity of the load - ANSWER d.
11. What applies to the capacities below the bold line shown on a load chart?
a. They are based on the structural strength of the crane
b. They must not be used
c. They are based on the stability of the crane
, d. They should only be used if the crane is set up on outriggers - ANSWER c.
12. In which quadrant are rough terrain crane capacities generally greater?
a. Over the front
b. Over the rear
c. Over the right side
d. Over the left side - ANSWER a.
13. According to federal requirements, under what conditions is it okay for a person to ride the headache ball?
a. When there is no other way to gain access
b. When the lift has been approved by an engineer
c. When other means would be more dangerous
d. It is never okay - ANSWER d.
14. By what percentage do most manufacturers require a crane's load chart capacity to be reduced by for duty
cycle operations such as high-volume concrete placement?
a. 10%.
b. 15%.
