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These sample
questions are intended to convey something of the style and
content of the National Operator Certification Program
examination developed and administered by the National
Commission for the Certification of Crane Operators(CCO). They
are not actual test questions, nor do they attempt to address
all of the areas of knowledge tested on the CCO certification
examination. Response to these questions is not necessarily an
indication of performance on the CCO examinations.
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 thumb up?
a. Boom
down
b. Swing
c. Boom up
d. Telescope out
2. Within what
percentage of level does a telescopic boom crane have to be for
the gross ratings in the load chart to remain valid?
a. 1%
b. 2%
c. 5%
d. It doesn’t matter so long as the outriggers are fully
extended and set
3. The load
line of the crane you’re operating comes into contact with an
energized power line. There’s no sign of any other danger, such
as fire. In such a situation, you should:
a. Climb
down carefully from the crane cab
b. Jump down, feet together
c. Stay in the cab until the lines are de-energized
d. Get as far away from the crane as possible
4. You’re
setting your crane up in a confined area and you cannot fully
extend your fourth outrigger. Your crane does not have a load
chart for intermediate extension working. In such a situation
you should use the capacities in the:
a.
on-outriggers load chart
b. on-rubber load chart
c. on-outriggers load chart while being careful not to swing
the load over the short outrigger
d. on-outriggers load chart, after shortening all outriggers
to the same length as the fourth (short) outrigger
5. According to
the B30.5 mobile crane standard, how many randomly distributed
broken wires in rotation-resistant rope are cause for
considering replacement of the rope?
a. 1 broken
wire in 6 rope diameters
b. 2 broken wires in 30 rope diameters
c. 3 broken wires in one strand in one lay
d. 2 broken wires in 6 rope diameters
6. Unless the
manufacturer states otherwise, the net capacity of a crane on
main boom is the capacity listed in the load chart:
a. minus
the weight of the rigging and all attachments
b. plus the weight of the rigging and all attachments
c. minus the weight of the rigging and all attachments not
in use
d. minus the weight of the rigging alone
7. Unless the
operator takes account of boom deflection, when lifted off the
ground, a properly rigged load may:
a. swing
out away from the crane
b. swing in towards the crane
c. raise absolutely vertically
d. shift in its rigging
8. Which is the
most common cause of death to crane operators?
a.
Electrocution
b. Falls from the crane getting on and off
c. Crane turnover
d. Fire
9. According to
the B30.5 mobile crane standard, it’s OK for an operator to
leave the cab of a crane with the engine running so long as:
a. the
operator keeps the crane in view and restricts access to the
area around the crane
b. the operator has at least four years experience
c. the crane is equipped with a fire extinguisher
d. it’s never OK
10. An operator
should respond to a "stop" signal from:
a.
appointed signal person only
b. project manager only
c. superintendent only
d. anyone
11. Unless the
manufacturer states otherwise, truck cranes generally have no
lifting capacity over which area?
a. the side
b. the rear
c. the front
d. the outriggers
12. "Working
radius" is defined as the distance from the:
a. base of
the boom to the center of the load
b. front of the crane to the center of gravity of the load
c. center of rotation of the crane to the center of the load
d. center of rotation of the crane to the center of gravity
of the load
13. If a bold
line is shown on a load chart, the capacities below the line:
a. are
based on the structural strength of the crane
b. must not be used
c. are based on the stability of the crane
d. should only be used if the crane is set up on outriggers
14. Rough
terrain crane capacities are generally greater over the:
a. front
b. rear
c. right side
d. left side
15. According
to federal requirements, under what conditions is it OK 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 OK
16. On duty
cycle operations, such as skipping concrete, most manufacturers
require a crane's load chart capacity to be reduced by:
a. 10%.
b. 15%.
c. 20%.
d. 30%.
17. Boom length
is measured from the:
a. base of
the boom to the center of the boom tip sheave.
b. boom hinge pins to the boom tip.
c. boom hinge pins to the center of the boom tip sheave.
d. base of the boom to the boom tip.
18. Using the
preferred method of installing wire rope from a reel onto a
hoist drum, the rope runs from the:
a. top of
the reel to the bottom of the drum.
b. bottom of the reel to the top of the drum.
c. top of the reel to the top of the drum.
d. There is no preferred method.
19. Truck crane
capacities are usually greater over the:
a. front.
b. rear.
c. front right outrigger.
d. side.
20. A truck
crane is set up on outriggers. The part of the load chart
governed by stability is based on what percentage of the crane's
capacity?
a. 85%
b. 100%
c. 70%
d. 75%
21. According
to OSHA, accessible areas of the operating crane must always be
barricaded within:
a. the
swing radius of the crane
b. the carbody or chassis
c. the swing radius of the rear of the rotating
superstructure
d. the distance between the carbody or chassis and the boom
tip
22. What is the
OSHA regulation governing cranes in construction?
a. 1910.180
b. 1926.550
c. 1926.556
d. 1910.184
23. A crack in
the windshield of a crane cab is OK so long as:
a. it
causes no visible distortion that would interfere with safe
operations
b. it is less than 6 inches long
c. the windshield is replaced on the next annual inspection
d. it is never OK
24. OSHA
permits hoisting of personnel by crane so long as:
a. the
prevailing wind speed is less than 35 mph
b. there is no less hazardous or practicable way
c. all personnel have CPR training
d. no aerial work platform is available
25. A crane is
set up with 3 of its 4 outriggers fully extended and the fourth
retracted. Unless the manufacturer states otherwise, the
capacity of the crane in this configuration will be found in
the:
a.
on-outrigger chart
b. on-rubber chart
c. on-outrigger chart minus 20%
d. on-rubber chart plus 20%
26. When
lifting personnel, the total weight of the loaded personnel
platform must not exceed what percentage of the rated capacity
of the crane?
a. 75%
b. 50%
c. 85%
d. 45%
27. Side
loading of crane booms is permitted:
a. when the
operator says it's OK.
b. so long as no jib is installed.
c. only when the outriggers are fully extended.
d. only with freely suspended loads.
28. If the
operator makes two audible signals when moving a crane, he/she
intends to:
a. stop.
b. back up.
c. go ahead.
d. stop (emergency).
29. If a
crane's load moment indicator (LMI) malfunctions, the operator
should:
a. cease
crane operations and report the condition to the supervisor.
b. turn it off and continue as if the LMI were not
installed.
c. make mathematical allowances for any error.
d. attempt to repair the fault.
30. Blocking
(cribbing) may be placed under outrigger beams:
a. when
beams cannot be extended all the way out.
b. to increase capacity.
c. to improve stability.
d. never.
31. Timber
blocking placed under the tips of the tracks on a crawler crane
will:
a. increase
the permitted capacity of the crane
b. make the crane more stable
c. reduce the capacity of the crane
d. make the crane less stable
32. If a load
test is done on a repaired crane, the load must not exceed what
percentage of the manufacturer's crane rating?
a. 100%
b. 110%
c. 75%
d. 85%
33. When
handling boom sections, the best place for slings to be attached
is:
a. at the
pin connection points at the ends of the top chords
b. at the lattice members
c. anywhere on the top chords
d. at the pin connection points at the ends of the bottom
chords
34. The tipping
axis of a crawler crane:
a. is
always at the centerline of the idler or sprocket
b. depends if the idler or sprocket are in line or offset
from the track rollers
c. is through the centerline of the crane cab
d. is through the boom butt section
35. Materials
placed under overhead energized power lines should:
a. be
dragged out
b. lifted as normal
c. not be lifted by crane
d. handled with extra care
36. The hand
signal depicted is instructing the operator to:
a. boom up
b. boom down
c. telescope in
d. hoist up
37. When
working at ground floor level near a cellar wall, the crane's
outrigger pads or tracks should be placed:
a. as close
as possible to the wall
b. at least as far back as the depth of the wall below
ground
c. at a distance at least half the depth of the cellar wall
below ground
d. anywhere, since the wall is unaffected by the weight of
the crane
38. When
setting a crane up on outriggers, the wheels of the crane
should:
a. just
touch the ground
b. be as high as possible off the ground
c. be just high enough off the ground to relieve the tires
of crane weight
d. stay firmly on the ground to support the crane
39. If you move
a crawler crane from soft ground to harder ground, ground
bearing pressure will:
a. increase
b. decrease by a third
c. remain the same
d. decrease by half
40.
Rotation-resistant rope can be used with a swivel:
a. always
b. never
c. if the rope manufacturer approves
d. if the operator decides it’s OK
41. On pick and
carry operations, you should:
a. keep the
boom as short as possible
b. keep the load as high above the ground as possible
c. ensure the load is as far from the carrier/carbody as
possible
d. use maximum boom length
42. On a
crawler crane, ground bearing pressure is greatest:
a. over the
right side
b. over the end
c. over the corner
d. over the left side
43. When
preparing to hoist a light load, the hook should be positioned:
a. slightly
to the side you're planning to swing to
b. slightly to the side opposite you plan to swing to
c. directly above the load's center of gravity
d. above the edge of the load closest to the crane
44. According
to ASME B30.5, when working around power lines of more than
750kV, how much clearance is generally required from any part of
the crane and its load?
a. 35 ft.
b. 30 ft.
c. 45 ft.
d. 25 ft.
45. You plan to
pick a load you are told weighs 36,500 lbs. Line pull on the
crane you are operating is 9,000 lbs. How many parts of line
will you need?
a. 3
b. 4
c. 5
d. 6
46. If a jib is
erected but not being used to lift the load, you should make a
deduction from the gross capacities listed in the load chart
based on:
a. the
actual weight of the jib
b. the effective weight of the jib
c. nothing, since the jib is not in use
d. the difference between the crane's actual weight and its
effective weight
47. When the
boom length of the crane falls between the lengths listed in the
load chart, you should use the capacity listed for:
a. the next
longest boom length
b. the next shortest boom length
c. a length estimated between the lengths in the chart
d. the next longest or the next shortest boom length,
whichever is the lower capacity
48. It's OK to
temporarily bypass a crane's overload warning system:
a. when a
supervisor tells you to
b. when the load to be lifted exceeds the capacity in the
chart
c. never
d. during assembly/disassembly operations
49. On a
crawler crane, the part of the load chart governed by stability
is based on what percentage of its capacity?
a. 85%
b. 100%
c. 70%
d. 75%
50. As you boom
down, the leverage of the load on the crane will:
a. increase
b. decrease
c. stay the same
d. depends on the weight of the load being lifted
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