NCCCO MOBILE CRANE EXAM QUESTIONS AND ANSWERS
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?
a. Boom down
b. Swing
c. Boom up
d. Extend boom - ANS c.
2. When hoi...
NCCCO
MOBILE
CRANE
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?
a.
Boom
down
b.
Swing
c.
Boom
up
d.
Extend
boom
-
ANS
c.
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?
a.
1%
b.
2%
c.
5%
d.
8%
-
ANS
a.
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?
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
-
ANS
c.
4.
According
to
OSHA
1926.1413,
how
many
randomly
distributed
broken
wires
in
rotation-resistant
rope
are
cause
for
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
-
ANS
d.
5.
What
is
the
net
capacity
of
a
crane
on
main
boom
unless
the
manufacturer
states
otherwise?
a.
The
capacity
listed
in
the
load
chart
minus
the
weight
of
the
rigging
and
all
attachments
b.
The
capacity
listed
in
the
load
chart
plus
the
weight
of
the
rigging
and
all
attachments
c.
The
capacity
listed
in
the
load
chart
minus
the
weight
of
the
rigging
and
all
attachments
not
in
use
d.
The
capacity
listed
in
the
load
chart
minus
the
weight
of
the
rigging
alone
-
ANS
a.
6.
What
may
happen
to
a
properly
rigged
load
when
lifted
off
the
ground
unless
the
operator
takes
account
of
boom
deflection?
a.
It
could
swing
out
away
from
the
crane
b.
It
could
swing
in
towards
the
crane c.
It
could
raise
absolutely
vertically
d.
It
could
shift
in
its
rigging
-
ANS
a.
7.
What
Standard
Method
hand
signal
is
being
illustrated?
a.
Swing
b.
Stop
c.
Emergency
Stop
d.
Travel
-
ANS
a.
8.
Who
should
an
operator
respond
to
a
"stop"
signal
from?
a.
Appointed
signal
person
only
b.
Project
manager
only
c.
Superintendent
only
d.
Anyone
-
ANS
d.
9.
Which
area
do
truck
cranes
without
a
5th
outrigger
generally
have
no
lifting
capacity
unless
the
manufacturer
states
otherwise?
a.
The
side
b.
The
rear
c.
The
front
d.
The
outriggers
-
ANS
c.
10.
What
is
the
definition
of
"operating
radius?"
a.
The
distance
from
the
base
of
the
boom
to
the
center
of
the
load
b.
The
distance
from
the
front
of
the
crane
to
the
center
of
gravity
of
the
load
c.
The
distance
from
the
center
of
rotation
of
the
crane
to
the
center
of
the
load
d.
The
distance
from
the
center
of
rotation
of
the
crane
to
the
center
of
gravity
of
the
load
-
ANS
d.
11.
What
applies
to
the
capacities
below
the
bold
line
shown
on
a
load
chart?
a.
They
are
based
on
the
structural
strength
of
the
crane
b.
They
must
not
be
used
c.
They
are
based
on
the
stability
of
the
crane
d.
They
should
only
be
used
if
the
crane
is
set
up
on
outriggers
-
ANS
c.
12.
In
which
quadrant
are
rough
terrain
crane
capacities
generally
greater?
a.
Over
the
front
b.
Over
the
rear
c.
Over
the
right
side
d.
Over
the
left
side
-
ANS
a.
13.
According
to
federal
requirements,
under
what
conditions
is
it
okay
for
a
person
to
ride
the
headache
ball?
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