Mobile Cranes Exam Questions With
Complete Solutions
Assembling the boom on an outrigger type crane
without properly setting the outriggers may result
in: Correct Answers Not enough stability to lift the
boom
Difficulty in lining up the boom pin connections
Inability to swing over the side as the
counterweight may turn the crane over backward
Blocking on both sides of the pin connections is
important because: Correct Answers It relieves
the pressure from the pins
Proper blocking is the safest way for dismantling a
crane
During assembly, the portion of the boom that is
suspended beyond the main boom suspension
point is called the: Correct Answers Cantilever
Length
During operation, you don't want the boom to take
wind from what direction? Correct Answers Side
,During which of the following operations are most
lattice booms damaged? Correct Answers
Transport and handling
Extending the crawler tracks on a crane has what
effect on its capacity? Correct Answers Increase It
If a crane must be left to weathervane overnight, it
is essential that the crane has: Correct Answers
Full 360 degree ratings
If leaving a crane unattended with the lattice boom
elevated, never deliberately orient the crane boom
to take wind from what direction? Correct Answers
Front
It is recommended to lift lattice boom sections with
which type of rigging? Correct Answers Synthetic
web slings
Not using the proper counterweight for the specific
length of boom may cause: Correct Answers
Incorrect capacity for the boom and jib
configuration being used
On a crawler crane, the part of the load chart
governed by stability is based on what percentage
of its capacity? Correct Answers 75%
, On a lattice boom truck crane, boom angle is
measured between the center line of the: Correct
Answers Loaded boom and horizontal
On lattice boom cranes, the boom angle is the
angle between the: Correct Answers Center line of
the boom and the horizontal
Unless the manufacturer specifies otherwise, when
assembling a lattice boom working from the heel
section toward the head section, in what order
would you assemble the following: 40 ft, 20 ft, 10
ft, 20 ft Correct Answers 10 ft, 20 ft, 20 ft, 40 ft
What action must be taken by the operator if a
boom lacing is slightly damaged? Correct Answers
Replace or repair the boom section before
operating the crane
What is the maximum number of randomly
distributed broken wires that are permitted in one
rope lay length on a running rope? Correct
Answers 5
What reference material would you refer to in
determining the maximum boom length that may
be cantilevered? Correct Answers Manufacturer's
written procedure
Complete Solutions
Assembling the boom on an outrigger type crane
without properly setting the outriggers may result
in: Correct Answers Not enough stability to lift the
boom
Difficulty in lining up the boom pin connections
Inability to swing over the side as the
counterweight may turn the crane over backward
Blocking on both sides of the pin connections is
important because: Correct Answers It relieves
the pressure from the pins
Proper blocking is the safest way for dismantling a
crane
During assembly, the portion of the boom that is
suspended beyond the main boom suspension
point is called the: Correct Answers Cantilever
Length
During operation, you don't want the boom to take
wind from what direction? Correct Answers Side
,During which of the following operations are most
lattice booms damaged? Correct Answers
Transport and handling
Extending the crawler tracks on a crane has what
effect on its capacity? Correct Answers Increase It
If a crane must be left to weathervane overnight, it
is essential that the crane has: Correct Answers
Full 360 degree ratings
If leaving a crane unattended with the lattice boom
elevated, never deliberately orient the crane boom
to take wind from what direction? Correct Answers
Front
It is recommended to lift lattice boom sections with
which type of rigging? Correct Answers Synthetic
web slings
Not using the proper counterweight for the specific
length of boom may cause: Correct Answers
Incorrect capacity for the boom and jib
configuration being used
On a crawler crane, the part of the load chart
governed by stability is based on what percentage
of its capacity? Correct Answers 75%
, On a lattice boom truck crane, boom angle is
measured between the center line of the: Correct
Answers Loaded boom and horizontal
On lattice boom cranes, the boom angle is the
angle between the: Correct Answers Center line of
the boom and the horizontal
Unless the manufacturer specifies otherwise, when
assembling a lattice boom working from the heel
section toward the head section, in what order
would you assemble the following: 40 ft, 20 ft, 10
ft, 20 ft Correct Answers 10 ft, 20 ft, 20 ft, 40 ft
What action must be taken by the operator if a
boom lacing is slightly damaged? Correct Answers
Replace or repair the boom section before
operating the crane
What is the maximum number of randomly
distributed broken wires that are permitted in one
rope lay length on a running rope? Correct
Answers 5
What reference material would you refer to in
determining the maximum boom length that may
be cantilevered? Correct Answers Manufacturer's
written procedure
