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NCCCO Core Prep Test exam
What is the most common type of wire rope used on a crane?
Right regular lay
According to Table A of OSHA 1926.1408 the minimum clearance distance for a power line over 200 KV is?
20 ft.
What is the purpose of installing an auxiliary boom point sheave to the main boom tip?
Separate hoist lines
When lifting from a jib/extension and the main boom is not fully extended. What information must you use to get the gross capacity from the load chart?
Main boom angle
According to Table A of OSHA 1926.1408 the minimum clearance distance for a power line up to 50 KV
is?
10 ft.
According to Table A of OSHA 1926.1408 the minimum clearance distance for a power line at 100 KV
is?
15 ft.
According to Table A of OSHA 1926.1408 the minimum clearance distance for a power line over 350 KV is?
25 ft.
According to Table A of OSHA 1926.1408 the minimum clearance distance for a power line over 500 KV is?
35 ft.
According to Table A of OSHA 1926.1408 the minimum clearance distance for a power line at 750 KV
is?
35 ft.
According to Table A of OSHA 1926.1408 the minimum clearance distance for a power line at 1000 KV
is?
45 ft.
If carrying a load on a downward slope, the radius will ____?
Increase
If carrying a load on an upward slope, the radius will ____?
Decrease
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?
20%
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 top of the drum
Over which quadrant are truck crane capacities usually greater?
Over the rear
According to OSHA, which accessible area of an operating crane must always be barricaded?
The swing radius of the rear of the rotating superstructure
What is the OSHA regulation governing cranes in construction?
Under which circumstance is a crack in the windshield of a crane cab okay? As long as it causes no visible distortion that would interfere with safe operations Under which circumstance does OSHA permits hoisting of personnel by crane?
As long as there is no less hazardous or practicable way
Unless the manufacturer states otherwise, what crane capacity chart is appropriate when a crane is set up with 3 of its 4 outriggers extended and the fourth is retracted?
On-rubber chart
According to OSHA, while hoisting personnel, the total load must not exceed what percentage of the crane's rated capacity?"
50%
When is side loading of crane booms permitted?
Only with freely suspended loads
What is indicated if an operator makes two audible signals when moving a crane?
He/she intends to go ahead
What is the result of placing timber blocking under the tips of the tracks on a crawler crane?
Makes the crane more stable
According to ASME, what percentage of the manufacturer's crane rating must not be exceeded if a load test is done on a repaired crane?
110%
What should be done with materials placed under overhead energized power lines?
Not be lifted by crane
Where should the crane's outrigger pads or tracks be placed when working at ground floor level near a cellar wall?
At least as far back as the depth of the wall below ground
A swivel on rotation resistant wire rope can be used when ________?
The manufacturer gives approval
If the anti-two block is not working properly, an alternative measure is _______?
Immediately report to the supervisor and mark the wire rope
When a crane suddenly stops during a lift, the loading on the crane tends to _________?
Increase
What type of jib can increase or decrease angle during operation? Luffing jib
What happens to the leverage of the load on a crane as the boom is being lowered?
It increases
The minimum approach distance for cranes driving, in transit, under power lines that are over 50 kV is _____?
10'
During disassembly of a long boom, the pendant lines are connected at the maximum cantilever point and the boom is slightly lifted off the ground. Which pins are to be removed next?
The bottom pins ahead of the cantilever point
Which configuration requires the greatest capacity reduction when out of level?
Long boom, minimum radius
What is the purpose of a Load Moment Indicator?
Aid the operator by displaying relevant information and alert the operator of unsafe conditions.
According to ASME B30.5, how often must a crane operator take a physical exam?
Every 3 years
What is an example of high duty cycle?
High speed concrete operations
While setting a crane up on unstable ground what must the operator ensure?
The stabilizer is 90° to the pad
When a lattice boom is being dismantled __________.
Never touch any pin on any boom section located between the pendant attachment points and the crane.
How can an operator ensure the radius being displayed by the LMI is correct?
By proper measurement
What is the purpose of a barge chart?
To account for list and trim
What must be done when working on a barge?
The crane must be secured
The capacity listed on the load chart given the configuration minus all applicable attachments/load handling devices
The term "center of gravity" means:
The point of an object around which the weight is averaged (concentrated) ANSI/ASME B30.5 deals with which type of cranes?
Mobile and locomotive
What is the meaning of "boom stop"?
Device used to limit the boom at its highest position.
In order to calculate the working load limit of wire rope, you must:
Divide the breaking strength by the appropriate design factor "Effective weight" is:
The calculated amount of effect a component will have on the lifting point of a crane
On a lattice boom crane, which position should the gantry be in when lifting a load?
Highest position
Blocking angle type outriggers too high could cause:
Tipping axis reduction
The effect of external pressure on wire rope is described as:
Crushing
Due to its tendency to untwist, which of these types of wire rope should NOT be used on single part hoisting lines?
Lang lay
Rotation resistant wire rope sometimes has a lower Working Load Limit than an equal sized regular lay wire rope because:
Rotation resistant wire rope has a higher design factor
At what angle to the horizontal will the stress on each sling leg (using 2 slings) be equal to the weight of the load?
30°
Extra load radius can be caused by:
Rapid swing
Crane stability is based on:
The leverage principle
The effective weight of an attachment is:
Any of these options
The primary purpose of a jib is:
To increase tip height
Crane User
Who is responsible for ensuring crane operations are stopped if alerted to an unsafe condition?
Lift Director
If the operator or A/D determine that ground conditions are not suitable for the equipment being operated, they should request the _________ correct the issue
Controlling Entity
Who is responsible for ensuring that personnel involved in crane operations understand their responsibilities, assigned duties and associated hazards?
Lift Director
When can the operator of a crane set the crane up with less than fully extended outriggers?
When the load chart allows
The outrigger pad and cribbing should be strong enough to support?
The total weight of the crane and the load
What must be known prior to setting up your crane?
Location of underground vaults
What is the minimum distance the flange on the hoist drum should extend above the last wrap of rope?
½ inch
Eccentric main boom tip reeving will
Twisting of the boom
What is the most common wire rope used on most cranes?
Right regular lay
Prior to leveling a crane what should be done with the outrigger jack?
Secure the float pad to jack cylinder
What three functions will not work after two-blocking a crane that has a prevention system?
Boom down, extend the boom and hoist
Boom angle on a telescoping boom is measured from above or below horizontal to the _________?
Longitudinal axis of the boom base section
The line pull of the innermost layer on the hoist drum is __________than the outermost layer.
Greater
Side loading of a crane can be caused by?
Wind
If power fails to the crane what must the operator ensure is done?
The controls are put in the neutral position
Which statement about sling angles is correct?
As sling angle decreases, sling stress increases
When installing a wedge socket end termination on the crane the live section of the rope should be in line with the? Pin
Which of the following hitches would be best suited for lifting a bundle of items?
Double wrapped choker
If the signal person extends his arm at shoulder height with his thumb pointing down what do they want the operator to do?
Boom down
If the signal person has their arm extended and is pointing to his/her left, what do they want you to do?
Swing right
Why is a carry deck crane, called a carry deck?
The deck of the crane has carrying capacities
How much clearance is required between the counterweight of the crane and all objects?
2 ft.
Which of the following would be good ground conditions for setting up a crane?
Compacted and level
When using a carpenter's level to check the level condition of the crane, where would be the best location to put the level?
Swing bearing of the upper works
What is the advantage to placing mats or cribbing under the outrigger floats?
Lowers the ground pressure applied by the crane
When operating a crane within 100 feet of water what degree of level should your crane be?
.57 degrees
When is it ok to place blocking under the outrigger beams of a crane?
Never
What is the purpose of installing a auxiliary boom point sheave to the main boom tip?
Separate hoist lines
Which of the following is considered standing rope?
Pendant line
How many broken wires are allowed in one strand of one lay of standard wire rope?
3
The lubricant used for wire rope should be of what type?
When booming down with a jib/extension erected the effective weight of the jib_____?
Increases
When using a crane in a duty cycle operation manufacturers usually de-rate the cranes capacity by?
20%
How would the operator of the crane know if the radius on the LMI is correct?
By measuring
According to OSHA, each series of voice signals contain how many elements?
3
What is the first element of voice signals given to a crane operator prior to the lift?
Function and direction
When working within the boom's length of energized power lines what is required?
A dedicated spotter to maintain safe clearances
What is the first thing the operator should do if the crane comes in contact with an energized power line?
Remain in the cab until power line is de-energized
The weight deduction for a stowed jib is _______?
The effective weight
If the boom angle of the crane falls between values on the load chart you should use?
The lower angle
Unless otherwise noted by the manufacturer, lattice boom sections should be added:
With the shorter sections installed toward the butt end.
The term "slew" means:
Swing
Quadrants of operation can be found in:
Work area diagram
Which of these functions could increase deflection of the crane's boom?
Swinging the load
Which of these statements is true?
Jib capacities increase as the angle to the ground increases
Which of the following would be okay to remove from a carry deck crane for lifting operations?
Boom extension
Which of these functions can change a mobile crane's quadrant of operation?
Swing
The angle between the legs of a 2-leg bridle hitch is referred to as the
