Red Seal Interprovincial Examination Mobile
Crane Operator Lattice Boom Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download Pdf
1. The primary purpose of the load chart on a lattice boom crane is
to
A) Show the crane's fuel consumption
B) Indicate operator work hours
C) Provide maximum safe lifting capacities at various boom
lengths and radii
D) Track maintenance schedules
The load chart ensures lifts are performed within safe limits to
prevent tipping or structural failure.
2. When rigging a load with slings, the angle between the sling and
the horizontal should not be less than
A) 30 degrees
B) 20 degrees
C) 45 degrees
D) 60 degrees
Too small an angle increases stress on the sling and can cause
failure.
3. Before operating a crane, the operator must perform a
A) Fuel check only
B) Pre-operation inspection
, C) Load calculation only
D) Noise level check
Pre-operation inspections identify mechanical, structural, and
safety issues before operation.
4. The purpose of a crane’s outriggers is to
A) Reduce noise
B) Increase engine power
C) Stabilize the crane during lifting
D) Assist in steering
Outriggers increase the crane’s footprint to prevent tipping.
5. A tag line is used to
A) Lift loads faster
B) Control load rotation and movement
C) Measure lifting height
D) Secure the crane to the ground
Tag lines help guide and stabilize suspended loads.
6. The rated capacity of a crane is determined
A) By the operator’s experience
B) By the type of fuel used
C) By the manufacturer under specific conditions
D) Randomly
Manufacturers test cranes to determine safe lifting limits at
various configurations.
7. The first step in planning a lift is to
A) Inspect the crane
B) Assess the site and load requirements
C) Test the hoist brakes
, D) Fill fuel tanks
Site assessment ensures safety and proper crane placement.
8. A lattice boom is preferred over a telescopic boom because it
A) Is lighter but weaker
B) Provides higher lifting capacity for long reaches
C) Requires no maintenance
D) Can lift unlimited weight
Lattice booms have truss construction allowing greater height and
capacity.
9. The stability of a crane decreases when
A) The load is lowered
B) The boom is extended horizontally with a heavy load
C) Outriggers are fully deployed
D) The ground is level
Extended booms increase leverage and tipping risk.
10. The load moment indicator (LMI) on a crane
A) Measures wind speed
B) Alerts the operator if the load exceeds safe limits
C) Controls the crane automatically
D) Monitors fuel efficiency
LMI prevents overloads by warning the operator when lifting
beyond safe parameters.
11. Which type of crane inspection is legally required after any
significant lift or unusual event?
A) Weekly inspection
B) Post-incident inspection
C) Monthly inspection
Crane Operator Lattice Boom Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download Pdf
1. The primary purpose of the load chart on a lattice boom crane is
to
A) Show the crane's fuel consumption
B) Indicate operator work hours
C) Provide maximum safe lifting capacities at various boom
lengths and radii
D) Track maintenance schedules
The load chart ensures lifts are performed within safe limits to
prevent tipping or structural failure.
2. When rigging a load with slings, the angle between the sling and
the horizontal should not be less than
A) 30 degrees
B) 20 degrees
C) 45 degrees
D) 60 degrees
Too small an angle increases stress on the sling and can cause
failure.
3. Before operating a crane, the operator must perform a
A) Fuel check only
B) Pre-operation inspection
, C) Load calculation only
D) Noise level check
Pre-operation inspections identify mechanical, structural, and
safety issues before operation.
4. The purpose of a crane’s outriggers is to
A) Reduce noise
B) Increase engine power
C) Stabilize the crane during lifting
D) Assist in steering
Outriggers increase the crane’s footprint to prevent tipping.
5. A tag line is used to
A) Lift loads faster
B) Control load rotation and movement
C) Measure lifting height
D) Secure the crane to the ground
Tag lines help guide and stabilize suspended loads.
6. The rated capacity of a crane is determined
A) By the operator’s experience
B) By the type of fuel used
C) By the manufacturer under specific conditions
D) Randomly
Manufacturers test cranes to determine safe lifting limits at
various configurations.
7. The first step in planning a lift is to
A) Inspect the crane
B) Assess the site and load requirements
C) Test the hoist brakes
, D) Fill fuel tanks
Site assessment ensures safety and proper crane placement.
8. A lattice boom is preferred over a telescopic boom because it
A) Is lighter but weaker
B) Provides higher lifting capacity for long reaches
C) Requires no maintenance
D) Can lift unlimited weight
Lattice booms have truss construction allowing greater height and
capacity.
9. The stability of a crane decreases when
A) The load is lowered
B) The boom is extended horizontally with a heavy load
C) Outriggers are fully deployed
D) The ground is level
Extended booms increase leverage and tipping risk.
10. The load moment indicator (LMI) on a crane
A) Measures wind speed
B) Alerts the operator if the load exceeds safe limits
C) Controls the crane automatically
D) Monitors fuel efficiency
LMI prevents overloads by warning the operator when lifting
beyond safe parameters.
11. Which type of crane inspection is legally required after any
significant lift or unusual event?
A) Weekly inspection
B) Post-incident inspection
C) Monthly inspection
