Tower Crane Test Prep (New 2023/ 2024 Update) Questions and Verified Answers| 100% Correct
Tower Crane Test Prep (New 2023/ 2024
Update) Questions and Verified Answers|
100% Correct
QUESTION
What is radius?
Answer:
The horizontal distance between a projection of the axis of rotation to the base of the crane
QUESTION
What is rated load or load rating?
Answer:
The maximum allowable working load designated by the manufacturer
QUESTION
What is rotation resistant rope?
Answer:
Wire rope with inner layers strand laid in one direction with the outer layer on the opposite
direction
QUESTION
What is running ropes?
Answer:
Rope the spool on and off the drum
QUESTION
What rule indicates that the rule is mandatory and must be followed
Answer:
Shall
QUESTION
What rule indicates only a recommendation or advisability
Answer:
Should
QUESTION
What is structural competence
Answer:
The ability of the machine and its component to withstand opposite stress
QUESTION
What is the trolley?
Answer:
Components the move along the Jib of a hammerhead Tower Crane
QUESTION
What is wedge?
Answer:
A tempered device used to provide stability
QUESTION
On out of service stability requirement on travel cranes
Answer:
Rail clamps shall not be used for this purpose
QUESTION
Temporary constructions Tower Crane
Answer:
Less than five years
QUESTION
Out of service stability requirements may be satisfied by using stabilizer or Balast, what can not
be use?
Answer:
Rail clamps shall not be used for this purpose
QUESTION
When erecting, who shall prepare a site plan, including drawings that defined the following for
each crane
Answer:
Qualified person
QUESTION
Minimum clearance from structure in counterweight
Answer:
2 meters or 6′,6″
QUESTION
True or false the base support shall be accessible and free of debris, material, and standing water
Answer:
True
QUESTION
A list of weights of each crane components to be erected of dismantle
Answer:
Shall be available at the site
QUESTION
Crane erections and dismantling shall be performed under the direction direct supervisor of a
designated person
Answer:
True
QUESTION
Before installing fasteners, such as bolt, not support pins, they shall be visually inspected for
crack, neck and down
Answer:
Visual and by hand
QUESTION
Shims can be used to achieve plumbness, true or false
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Permanently mounted Tower Cranes is erected for long terms used at one location true or false
True
What is a hammerhead Tower Crane?
A Tower Crane with a horizontal jib, and a trolley that travels to change load radius
What is braced port guyed Tower Crane?
A Tower, Crane with braces or guys attached to the Tower Crane to permit the crane to be erected a crane greater than the maximum freestanding height
What is a luffing boom Tower Crane?
A tower with the hoist mechanism, the raise and lowered the boom in a vertical plane to change load radius
What is braced or guyed Tower Crane
A Tower Crane with brace or a guys attached to the Tower Crane to permit the crane to be erected or climb greater than the maximum standing height
What is freestanding Tower Crane?
Tower Crane that is supported by a foundation or a structural support without assistance from brace or guys
What is internal climbing Tower Crane’s?
A Tower Crane, arrange to raise itself from floor to floor in a building as construction advances
Secondary parts or assembly of parts that contribute to the overall function and usefulness of the machine
Accessories
What is axis of rotation?
The vertical line about which a crane swings
The condition of a super structure of a Tower Crane necessary for climbing
Needs to be Balance
What is ballast?
The weight added to the crane base to create additional stability. It does not rotate when the crane swings.
What is base anchor bolts?
A base that is bolted to the footing
How many times can the bolt be used on a Tower Crane?
Only once
What is base traveling on a Tower Crane?
A crane base that is a Ballast platform mounted on buggies that ride along rails
What is the device other than the motor use for retarding or stop in motion by friction or power means
Breaks
What is an energy absorbed in device for reducing impact we’re moving the crane trolley In-N-Out
Buffer
What is climbing crossmember?
Hydraulic cylinder used to engage when climbing ladders, or log via Pawls to raise or lower the structure
What is a climbing ladder?
A steel member with cross bar used as Jacking support points when some cranes climb
What is the mean for engaging or disengaging of power?
Clutch
What is the counter jib?
A horizontal member of the Crane on wish the counterweight are hoist into
What is counterweights?
Weights added to the Crane superstructure to create additional stability
What are cranes that is not in regular service use
Standby, Cranes
What is flange point?
The point of contact in which the rope change layers in the drum
What is guy ropes?
Pendant
What is limited device?
A device that restrict loads or motion of the machine or equipment when capacity is exceeded
What is the operation aid?
A device that provides information to facilitate the operations on the Crane (LMI)
What is the device for possibly holding against motion in one or more direction?
Pawls
What is pitch diameter?
Diameter of the sheave or rope drum measure at the centerline of the rope
What is a qualified person?
A person who by possession of recognized degree or certification or professional standing
What is radius?
The horizontal distance between a projection of the axis of rotation to the base of the crane
What is rated load or load rating?
The maximum allowable working load designated by the manufacturer
What is rotation resistant rope?
Wire rope with inner layers strand laid in one direction with the outer layer on the opposite direction
What is running ropes?
Rope the spool on and off the drum
What rule indicates that the rule is mandatory and must be followed
Shall
What rule indicates only a recommendation or advisability
Should
What is structural competence
The ability of the machine and its component to withstand opposite stress
What is the trolley?
Components the move along the Jib of a hammerhead Tower Crane
What is wedge?
A tempered device used to provide stability
On out of service stability requirement on travel cranes
Rail clamps shall not be used for this purpose
Temporary constructions Tower Crane
Less than five years
Out of service stability requirements may be satisfied by using stabilizer or Balast, what can not be use?
Rail clamps shall not be used for this purpose
When erecting, who shall prepare a site plan, including drawings that defined the following for each crane
Qualified person
Minimum clearance from structure in counterweight
2 meters or 6′,6″
True or false the base support shall be accessible and free of debris, material, and standing water
True
A list of weights of each crane components to be erected of dismantle
Shall be available at the site
Crane erections and dismantling shall be performed under the direction direct supervisor of a designated person
True
Before installing fasteners, such as bolt, not support pins, they shall be visually inspected for crack, neck and down
Visual and by hand
Shims can be used to achieve plumbness, true or false
False unless approved by manufacturer
Signs, panels, storage boxes, structures, or enclosures, no provided by the manufacturer
Shall not be installed on the crane
True or false construction Tower Crane’s are regulated by ANSI 30.3 standard
True
Low rise, tower crane
Up to six stories
mid rise, tower crane
From 7 to 15 stories
High-rise, Tower Crane
Over 15 stories
A fixed Tower Crane requires what kind of concrete pad?
A concrete pad that is 30′ x 30′ x 4′ thick
The base is not moving, and a rotating or slewing ring, is located beneath the jib
Fixed tower
When does a slewing ring is located at the base and the entire assembly rotates, what is it?
Slewing Tower
If erected by a building, the crane must have?
Must be braced at least every four floors
All crane components most have what
The crane manufacturers name, serial number, model number, year of manufacturers, weight and size of the unit
Crane components can be mix and match with any other crane
False they cannot be mixed match with other cranes
Who have to sign the logbook that is kept on the Crane to record or operating hours inspections and any other maintenance
Must be signed by Operator, service mechanic, and supervisor
True or false a site plan must be carefully prepare before Tower Crane is set up
True
When a tower is set inside a structure, what has to be considered?
Open most be large enough to permit, climbing in hardwood support
Wedges must be inserted at a minimum of four floors, true or false
True
During assembly, the bolts are usually torque at?
75% during erecting and 100% after the crane is erected
Guidelines are not often needed to support a freestanding guidelines
False
What kind of clips are use on the pins?
Use cotter pins, not spring clips on the pin
How many floors is the tower supposed to be secured to a building?
Every four floors
All electrical connection must be done by who
Certified electrician in accordance with the applicable local authorities
To torque the bolts 100% where is the counterweight supposed to be?
Right on top of the bolt that is being tighten
All limit switches must be set, and tested true or false
True
What type of fire extinguisher is required on all crane?
10 BC
What is trolley limit switch?
Cuts the power when the trolley reaches a predetermined position
What is Hook high limit switch?
Stop the block from hoisting at a predetermined distance from the jib sheave
Rail travel, limit switch
Apply brakes when approaches at the rail end
Hoist drum stop limit switches
Stop the drum when is overload
Hoist line overload switch
Cut Power at 105% overload on the line
Control fail safe
The type that automatically returns to neutral when released
Never allow the load to be lowered only by the brakes control unless the hoist has a speed limit device
True
Many crane types are tested at 125%. Where can you text Tower Cranes
No more than 5% or 105%
When most you check the controls?
Every day for proper function
Control must be installed, and Mark to move the crane in the direction indicator
True
What are the operating wind speed limits?
20 to 30 mph
What degree should be considered an operating limit on cold weather?
At 0° or -17 Celsius
The jib is allowed to side load under certain circumstances
False under any circumstance do not allow the Jib to side load
Never use the limit, switches or computerized control system to scale or judge a load weight
True
Somebody, other than the operator must be in charge of calculating all load weight
True sometimes the operator cannot see
If the load does not lift or hint level, what should you do?
Lower the load and re-hook
How many wraps you should have on the drum
At least 3 wraps
Can the operator leave the seat while load is suspended?
No, while Crane is moving or Loader suspended operator should stay on the seat
Which communication is preferred on a Tower Crane
A two way radio communication system
If communication is lost, or the operator loses sight of the signal person, what should the operator do?
Stop all procedures
On the luffing crane, boom should be at what degree when it’s unattended
The boom should be set at 15°
A Crane must be weathervane if left unattended
True
Where should climbing frames be installed on the tower when is not in use?
At the lowest point above the upper most Tie-in
Cranes in concrete structure shall not be climb until what?
Until the concrete is verified by testing to have sufficient strength
When does pre-operational test shall be performed?
Before the crane is put into service
Traveling cranes, Test to be conducted with the Jib, luffing boom, and counterweight in what position
Creating the maximum loading on a single wheel or bogey (worst case scenario)
On the hoist drum, the drum flanges, Shall be extend it to what?
One half the rope diameter, but no less 1/2 an inch or (13 mm) above the top layer of the rope during operation
The diameter of the drum shall be
No less than 18 times the normal diameter of the rope used
The pitch diameter of the load block sheaves shall be no less than
18 times the normal diameter of the rope use
The pitch diameter of a luffing boom hoist sheave shall be no less then
15 times the nominal diameter of the rope used
The design factor for load hoist ropes shall not be less than
5 to 1
The sheaves in the Load block shall be equipped with a close fitting guard to guard the rope against slipping out
True
Rotation resistant ropes can be use for Luffing boom hoist
False it can not only for hoisting
The design factor for luffing boom hoist ropes shall not be less than
3.5 to 1
Load hooks regulations ASME?
ASME B30.10.
An audible signal shall automatically sound continuously when?
When the crane travels to one others in the vicinity
Hydraulic cylinders used to support the crane during claiming shall…
Be equipped with check valves to hold a crane in the event of power failure
Hydraulic system shall be provided with pressure gauge and over pressure relief valve
True
Both ends of the jib shall be equipped with trolley stops or buffer
True
What OSHA regulation governs, suspended personnel platform
OSHA 1926.1431.
ASME lifting personnel
ASME B30.23
For standing ropes, the minimum design factor shall be?
3.0.
Standing rope that I use as live ropes during erection and luffing boom hoist running rope shall have a minimum the same factor of?
3.0.
Wire rope clips shall be drop forge steel of the single saddle (U-bolt) or double saddle type clip, malleable cast-iron clamps shall not be use
True
Only steel frame, concrete or solid steel counterweight suspended from the superstructure shall be used
True
Skid resistant surface Foot walk or walkway Shall be of what size
18″
On inspections, the manufacture’s criteria shall take precedence
True
Inspection shall be performed by a?
Designated person
On inspections, all deficiency identify shall be examined and a determination made by a?
Qualified person
Regular inspections are classified on three levels of inspections
Frequent, periodic, and Major inspection
What is frequent inspection?
Shall be conducted prior to use each day
Periodic inspection
As nearly as recommended by the manufacturer
Major inspection
Shall be conducted at 60 month intervals
What kind of inspection requires Records to be kept
Periodic inspection
Operational testing on the Tower Crane Has to be done with empty hook
True
Load limit device setting shall be verified by means of a load testing using empty hook
False, limit device have to be test with a loads
Parts used in the repair and maintenance of the equipment should be obtained from?
Manufacturer
On travel Cranes, limit testing shall be done with a load?
False. It Hass to be done with Empty hook
Load hoist and luffing boom hoist. Ropes shall be visually inspected when.?
Each working day
When The load trolley rope and counterweight movement ropes if provided, shall be visually inspected?
At least once a month
Removal criteria on running ropes
- Randomly distribute broken wires in one lay or four broken wires in one strand in one lay.
Removal criteria in rotation resistant rope
2 randomly distribute broken wires in a 6 rope diameter or 4 randomly distribute in 30 rope diameter
Removal criteria rope needs to be taken out of service if one outer wire, broken at the contact point
True
Removal criteria 1/3 its original diameter of outside individual wires are seen
True
A wire needs to be removed if diameter is greater than what %
greater than 5%. It’s nominal diameter.
Removal criteria wire needs to be replace if more than two wires adjacents at the socket end connection
True
12/1 lay, 2/6 – 4/30, 1 at contact point, 1/3 wear diameter, 5% reduction and 2 broken at the end connection
All removal criteria’s
Resocketing can be attempted
False, resocketing cannot be attempted
Design safety factor for pendant lines
2.5:1
What is ANSI be 30.1
Jacks
What is ANSI B30.9
Slings
What is ANSI B30.10
Hooks
What is ANSI be 30.26.
Rigging hardware
What is ANSI B30.20
Below the hook devices
For powerlines rated 50 KV or below minimum clearance shall be?
10ft