Mobile Construction Cranes |
MOBILE CONSTRUCTION CRANES – COMPREHENSIVE OPERATOR AND
RIGGING | EXAM QUESTIONS AND CORRECT ANSWERS | latest
updated
MOBILE CONSTRUCTION CRANES
COMPREHENSIVE OPERATOR AND RIGGING
1. Which mobile crane uses a single cab for both driving and crane
operation, has large off-road tires, and is intended mainly for travel
around the jobsite rather than on public highways?
A. All-terrain crane
B. Rough terrain crane
C. Truck crane
D. Lattice boom crawler crane
ANSWER : B. Rough terrain crane
A rough terrain crane is built on a single-cab, large-tire carrier designed
for unimproved ground and is normally moved between sites on a
trailer.
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, Mobile Construction Cranes |
2. What feature best distinguishes an all-terrain crane from other
wheeled mobile cranes?
A. It travels on crawler tracks
B. It combines highway travel speeds with off-road capability through
multiple axles and all-wheel drive and steering
C. It has no outriggers and always lifts on rubber
D. It is permanently mounted on a rail carriage
ANSWER : B. It combines highway travel speeds with off-road
capability through multiple axles and all-wheel drive and steering
All-terrain cranes merge the road speed of a truck crane with the rough-
ground mobility of an RT crane.
3. A conventional truck crane is typically equipped with:
A. Steel tracks instead of tires
B. A single cab used for both travel and lifting
C. A fixed upperstructure that cannot swing
D. A separate carrier cab for driving and an upper cab for crane
operation
ANSWER : D. A separate carrier cab for driving and an upper cab
for crane operation
Truck cranes keep the driving controls in the carrier cab and the crane
controls in the rotating upper cab.
4. What is a principal advantage of a crawler crane over a wheeled
crane?
A. It needs no ground preparation of any kind
B. It never requires assembly
C. Its tracks spread the load over a large area and allow it to travel with
a suspended load
D. It can travel at highway speeds
ANSWER : C. Its tracks spread the load over a large area and allow
it to travel with a suspended load
Tracks give low ground bearing pressure and a stable base, so crawlers
can pick and carry within chart limits.
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, Mobile Construction Cranes |
5. A carry deck crane is best described as:
A. A crane mounted on a barge
B. A large lattice crane used for heavy industrial modules
C. A compact crane with a flat deck for carrying material and a boom
that rotates 360 degrees, suited to plants and tight spaces
D. A tower crane with a hammerhead jib
ANSWER : C. A compact crane with a flat deck for carrying material
and a boom that rotates 360 degrees, suited to plants and tight
spaces
Carry deck cranes are small, highly maneuverable units that can carry
loads on their deck around facilities.
6. A boom truck differs from a conventional truck crane mainly
because it:
A. Has a crane mounted on a commercial truck chassis, usually behind
the cab with a cargo bed
B. Uses crawler tracks for travel
C. Is assembled on site from lattice sections
D. Cannot rotate its boom
ANSWER : A. Has a crane mounted on a commercial truck chassis,
usually behind the cab with a cargo bed
Boom trucks place a telescoping crane on a commercial truck chassis,
often combined with a flatbed for hauling materials.
7. Industrial pick-and-carry cranes are characterized by:
A. Lifting only with outriggers fully extended
B. Traveling on rubber tires with the load suspended, often with limited
or no swing
C. Being fixed to a foundation
D. Using only lattice boom sections
ANSWER : B. Traveling on rubber tires with the load suspended,
often with limited or no swing
Pick-and-carry units are designed to move loads around plants and
yards while traveling on their tires.
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, Mobile Construction Cranes |
8. Compared with a telescoping hydraulic boom, a lattice boom
generally offers:
A. A higher strength-to-weight ratio, allowing greater reach and
capacity at long radius
B. Faster setup with no assembly
C. Greater resistance to side loading
D. Automatic length adjustment under load
ANSWER : A. A higher strength-to-weight ratio, allowing greater
reach and capacity at long radius
The open truss design of a lattice boom is light for its strength, which
pays off at long boom lengths and radii.
9. What is the main operational advantage of a telescoping hydraulic
boom?
A. It can lift more at long radius than any lattice boom
B. It is immune to side loading
C. It never requires a load chart
D. Boom length can be changed quickly by hydraulic extension without
assembly
ANSWER : D. Boom length can be changed quickly by hydraulic
extension without assembly
Hydraulic sections extend and retract from the cab, making setup and
length changes fast.
10. A luffing jib allows the operator to:
A. Lock the jib permanently at one offset
B. Increase capacity at every radius
C. Change the jib angle independently of the main boom to reach over
obstructions
D. Swing the jib separately from the boom
ANSWER : C. Change the jib angle independently of the main boom
to reach over obstructions
Luffing jibs are raised and lowered on their own, giving flexible reach
above and over obstacles.
Page 4 of 59
MOBILE CONSTRUCTION CRANES – COMPREHENSIVE OPERATOR AND
RIGGING | EXAM QUESTIONS AND CORRECT ANSWERS | latest
updated
MOBILE CONSTRUCTION CRANES
COMPREHENSIVE OPERATOR AND RIGGING
1. Which mobile crane uses a single cab for both driving and crane
operation, has large off-road tires, and is intended mainly for travel
around the jobsite rather than on public highways?
A. All-terrain crane
B. Rough terrain crane
C. Truck crane
D. Lattice boom crawler crane
ANSWER : B. Rough terrain crane
A rough terrain crane is built on a single-cab, large-tire carrier designed
for unimproved ground and is normally moved between sites on a
trailer.
Page 1 of 59
, Mobile Construction Cranes |
2. What feature best distinguishes an all-terrain crane from other
wheeled mobile cranes?
A. It travels on crawler tracks
B. It combines highway travel speeds with off-road capability through
multiple axles and all-wheel drive and steering
C. It has no outriggers and always lifts on rubber
D. It is permanently mounted on a rail carriage
ANSWER : B. It combines highway travel speeds with off-road
capability through multiple axles and all-wheel drive and steering
All-terrain cranes merge the road speed of a truck crane with the rough-
ground mobility of an RT crane.
3. A conventional truck crane is typically equipped with:
A. Steel tracks instead of tires
B. A single cab used for both travel and lifting
C. A fixed upperstructure that cannot swing
D. A separate carrier cab for driving and an upper cab for crane
operation
ANSWER : D. A separate carrier cab for driving and an upper cab
for crane operation
Truck cranes keep the driving controls in the carrier cab and the crane
controls in the rotating upper cab.
4. What is a principal advantage of a crawler crane over a wheeled
crane?
A. It needs no ground preparation of any kind
B. It never requires assembly
C. Its tracks spread the load over a large area and allow it to travel with
a suspended load
D. It can travel at highway speeds
ANSWER : C. Its tracks spread the load over a large area and allow
it to travel with a suspended load
Tracks give low ground bearing pressure and a stable base, so crawlers
can pick and carry within chart limits.
Page 2 of 59
, Mobile Construction Cranes |
5. A carry deck crane is best described as:
A. A crane mounted on a barge
B. A large lattice crane used for heavy industrial modules
C. A compact crane with a flat deck for carrying material and a boom
that rotates 360 degrees, suited to plants and tight spaces
D. A tower crane with a hammerhead jib
ANSWER : C. A compact crane with a flat deck for carrying material
and a boom that rotates 360 degrees, suited to plants and tight
spaces
Carry deck cranes are small, highly maneuverable units that can carry
loads on their deck around facilities.
6. A boom truck differs from a conventional truck crane mainly
because it:
A. Has a crane mounted on a commercial truck chassis, usually behind
the cab with a cargo bed
B. Uses crawler tracks for travel
C. Is assembled on site from lattice sections
D. Cannot rotate its boom
ANSWER : A. Has a crane mounted on a commercial truck chassis,
usually behind the cab with a cargo bed
Boom trucks place a telescoping crane on a commercial truck chassis,
often combined with a flatbed for hauling materials.
7. Industrial pick-and-carry cranes are characterized by:
A. Lifting only with outriggers fully extended
B. Traveling on rubber tires with the load suspended, often with limited
or no swing
C. Being fixed to a foundation
D. Using only lattice boom sections
ANSWER : B. Traveling on rubber tires with the load suspended,
often with limited or no swing
Pick-and-carry units are designed to move loads around plants and
yards while traveling on their tires.
Page 3 of 59
, Mobile Construction Cranes |
8. Compared with a telescoping hydraulic boom, a lattice boom
generally offers:
A. A higher strength-to-weight ratio, allowing greater reach and
capacity at long radius
B. Faster setup with no assembly
C. Greater resistance to side loading
D. Automatic length adjustment under load
ANSWER : A. A higher strength-to-weight ratio, allowing greater
reach and capacity at long radius
The open truss design of a lattice boom is light for its strength, which
pays off at long boom lengths and radii.
9. What is the main operational advantage of a telescoping hydraulic
boom?
A. It can lift more at long radius than any lattice boom
B. It is immune to side loading
C. It never requires a load chart
D. Boom length can be changed quickly by hydraulic extension without
assembly
ANSWER : D. Boom length can be changed quickly by hydraulic
extension without assembly
Hydraulic sections extend and retract from the cab, making setup and
length changes fast.
10. A luffing jib allows the operator to:
A. Lock the jib permanently at one offset
B. Increase capacity at every radius
C. Change the jib angle independently of the main boom to reach over
obstructions
D. Swing the jib separately from the boom
ANSWER : C. Change the jib angle independently of the main boom
to reach over obstructions
Luffing jibs are raised and lowered on their own, giving flexible reach
above and over obstacles.
Page 4 of 59
