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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.
Answers to Questions
If you’d like to submit
questions to CCO, click
here to print an Item
Writing Response form
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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