NCCCO Mobile Crane Operator Test 2

Question 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?

Accepted Answer

Boom up

Answer

Swing

Answer

Extend boom

Answer

Boom down

Question 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?

Accepted Answer

1%

Answer

2%

Answer

5%

Answer

8%

Question 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?

Accepted Answer

Stay in the cab until the lines are de-energized

Answer

Get as far away from the crane as possible

Answer

Climb down carefully from the crane cab

Answer

Jump down, feet together

Question 4

According to OSHA 1926.1413, how many randomly distributed broken wires in rotation- resistant rope are cause for replacement of the rope?

Accepted Answer

2 broken wires in 6 rope diameters

Answer

2 broken wires in 30 rope diameters

Answer

1 broken wire in 6 rope diameters

Answer

3 broken wires in one strand in one lay

Question 5

What is the net capacity of a crane on main boom unless the manufacturer states otherwise?

Accepted Answer

The capacity listed in the load chart minus the weight of the rigging and all attachments

Answer

The capacity listed in the load chart minus the weight of the rigging and all attachments not in use

Answer

The capacity listed in the load chart minus the weight of the rigging alone

Answer

The capacity listed in the load chart plus the weight of the rigging and all attachments

Question 6

What may happen to a properly rigged load when lifted off the ground unless the operator takes account of boom deflection?

Accepted Answer

It could swing out away from the crane

Answer

It could shift in its rigging

Answer

It could raise absolutely vertically

Question 7

Who should an operator respond to a "stop" signal from?

Accepted Answer

Anyone

Answer

Superintendent only

Answer

Appointed signal person only

Answer

Project manager only

Question 8

What is the definition of "operating radius"?

Accepted Answer

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

Answer

The distance from the center of rotation of the crane to the center of the load

Answer

The distance from the base of the boom to the center of the load

Answer

The distance from the front of the crane to the center of gravity of the load

Question 9

According to federal requirements, under what conditions is it okay for a person to ride the headache ball?

Accepted Answer

It is never okay

Answer

When other means would be more dangerous

Answer

When there is no other way to gain access

Answer

When the lift has been approved by an engineer

Question 10

According to OSHA, which accessible area of an operating crane must always be barricaded?

Accepted Answer

The swing radius of the rear of the rotating superstructure

Answer

The carbody or chassis

Answer

The distance between the car body or chassis and the boom tip

Answer

The swing radius of the crane