NCCCO MOBILE CRANE EXAM

NCCCO MOBILE CRANE EXAM

EXAM 120 QUESTIONS AND CORRECT

DETAILED ANSWERS VERIFIED ANSWERS

GRADED A+

• Which area do truck cranes without a 5th outrigger generally have no lifting capacity unless the

manufacturer states otherwise?

• The side
• The rear
• The front
• The outriggers - ANSWER✔✔c.
• What is the definition of "operating radius?"
• 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

• The distance from the center of rotation of the crane to the center of the load
• The distance from the center of rotation of the crane to the center of gravity of the load -

ANSWER✔✔d.

• What applies to the capacities below the bold line shown on a load chart?
• They are based on the structural strength of the crane
• They must not be used
• They are based on the stability of the crane
• They should only be used if the crane is set up on outriggers - ANSWER✔✔c.
• In which quadrant are rough terrain crane capacities generally greater?
• Over the front
• Over the rear
• Over the right side 1 / 2

• Over the left side - ANSWER✔✔a.
• According to federal requirements, under what conditions is it okay for a person to ride the headache

ball?

• When there is no other way to gain access
• When the lift has been approved by an engineer
• When other means would be more dangerous
• It is never okay - ANSWER✔✔d.
• 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?

• 10%.
• 15%.
• 20%.
• 30%. - ANSWER✔✔c.
• From which two points should the boom be measured?
• From the base of the boom to the center of the boom tip sheave
• From the boom hinge pins to the boom tip
• From the boom hinge pins to the center of the boom tip sheaved. d. From the base of the boom to the

boom tip - ANSWER✔✔c.

• What is the preferred method of installing wire rope from a reel onto a hoist drum?
• The rope runs from the top of the reel to the bottom of the drum
• The rope runs from the bottom of the reel to the top of the drum
• The rope runs from the top of the reel to the top of the drum
• There is no preferred method - ANSWER✔✔c.
• 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?

• Boom down
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