NCCCO MOBILE CRANE OVERVIEW 2026 EXAM 150
QUESTIONS AND CORRECT ANSWERS WITH RATIONALES
COVERING THE MOST TESTED QUESTION PERFECT FOR
A+ GRADE
1. What is the primary purpose of a load chart on a mobile crane?
A) To schedule maintenance
B) To determine lifting capacity under specific conditions
C) To calculate fuel consumption
D) To train operators
Rationale: Load charts provide lifting capacities for specific boom lengths, angles, and
configurations, helping operators prevent overloading.
2. Before starting crane operations, the operator should perform which of the following?
A) Read the load chart
B) Inspect the crane
C) Review the lift plan
D) All of the above
Rationale: Operators must understand the load chart, inspect equipment, and review the lift plan
before operating.
3. What is the purpose of outriggers on a mobile crane?
A) Increase ground clearance
B) Stabilize the crane during lifts
C) Support travel mode
D) Reduce fuel consumption
Rationale: Outriggers extend and stabilize the crane to safely handle loads.
4. Which factor can reduce the lifting capacity of a crane?
A) Boom angle
B) Load weight
,C) Boom length
D) Ground conditions
Rationale: Capacity depends on boom length, angle, and stable support; adverse ground or
longer booms reduce lifting capacity.
5. What is the most important safety consideration when lifting near power lines?
A) Use outriggers
B) Maintain proper clearance
C) Reduce load weight
D) Only lift during daylight
Rationale: OSHA requires a minimum clearance from energized lines to prevent electrocution.
6. Which inspection is required daily for mobile cranes?
A) OSHA annual inspection
B) Pre-operational inspection
C) Load test inspection
D) Monthly maintenance check
Rationale: Daily pre-operational inspections identify wear, damage, or defects before use.
7. When should the crane’s boom angle indicator be used?
A) During travel
B) When positioning the boom for lifts
C) During refueling
D) During maintenance
Rationale: The boom angle indicator helps determine the safe lifting capacity based on boom
position.
8. What is a key responsibility of a crane signal person?
,A) Operate the crane
B) Direct the crane operator safely
C) Inspect the crane
D) Maintain the load chart
Rationale: Signal persons communicate with operators to ensure safe lift execution.
9. What is the first step in rigging a load?
A) Inspect slings and hooks
B) Lift the load immediately
C) Attach slings without inspection
D) Move the load
Rationale: Rigging equipment must be inspected for damage before use to prevent accidents.
10. Which of the following indicates that a crane is properly set up on outriggers?
A) Level crane and fully extended outriggers
B) Boom fully retracted
C) Load suspended in air
D) Engine running
Rationale: Proper setup ensures crane stability during lifts.
11. When performing a lift, which factor is critical to prevent tipping?
A) Load weight
B) Crane color
C) Operator’s experience only
D) Wind speed
Rationale: Knowing the load weight in relation to crane capacity prevents tipping accidents.
12. Which document provides guidance on crane operation and safety?
, A) Load chart
B) Operator’s manual
C) Fuel log
D) Maintenance schedule
Rationale: The operator’s manual outlines proper operating procedures and safety requirements.
13. What is the safe approach distance from high-voltage power lines for a mobile crane
under 50 kV?
A) 5 feet
B) 10 feet
C) 20 feet
D) 50 feet
Rationale: OSHA specifies minimum distances based on voltage to prevent electrocution.
14. When is it acceptable to lift a load exceeding the rated capacity?
A) During an emergency
B) Never
C) If the operator has experience
D) If the crane is on outriggers
Rationale: Exceeding rated capacity can cause crane failure and is never permitted.
15. Which of the following affects crane stability?
A) Load center distance
B) Tire pressure
C) Engine oil
D) Radio volume
Rationale: The farther the load is from the crane’s center, the less stable the lift.
16. How often must a mobile crane be load-tested according to NCCCO standards?
QUESTIONS AND CORRECT ANSWERS WITH RATIONALES
COVERING THE MOST TESTED QUESTION PERFECT FOR
A+ GRADE
1. What is the primary purpose of a load chart on a mobile crane?
A) To schedule maintenance
B) To determine lifting capacity under specific conditions
C) To calculate fuel consumption
D) To train operators
Rationale: Load charts provide lifting capacities for specific boom lengths, angles, and
configurations, helping operators prevent overloading.
2. Before starting crane operations, the operator should perform which of the following?
A) Read the load chart
B) Inspect the crane
C) Review the lift plan
D) All of the above
Rationale: Operators must understand the load chart, inspect equipment, and review the lift plan
before operating.
3. What is the purpose of outriggers on a mobile crane?
A) Increase ground clearance
B) Stabilize the crane during lifts
C) Support travel mode
D) Reduce fuel consumption
Rationale: Outriggers extend and stabilize the crane to safely handle loads.
4. Which factor can reduce the lifting capacity of a crane?
A) Boom angle
B) Load weight
,C) Boom length
D) Ground conditions
Rationale: Capacity depends on boom length, angle, and stable support; adverse ground or
longer booms reduce lifting capacity.
5. What is the most important safety consideration when lifting near power lines?
A) Use outriggers
B) Maintain proper clearance
C) Reduce load weight
D) Only lift during daylight
Rationale: OSHA requires a minimum clearance from energized lines to prevent electrocution.
6. Which inspection is required daily for mobile cranes?
A) OSHA annual inspection
B) Pre-operational inspection
C) Load test inspection
D) Monthly maintenance check
Rationale: Daily pre-operational inspections identify wear, damage, or defects before use.
7. When should the crane’s boom angle indicator be used?
A) During travel
B) When positioning the boom for lifts
C) During refueling
D) During maintenance
Rationale: The boom angle indicator helps determine the safe lifting capacity based on boom
position.
8. What is a key responsibility of a crane signal person?
,A) Operate the crane
B) Direct the crane operator safely
C) Inspect the crane
D) Maintain the load chart
Rationale: Signal persons communicate with operators to ensure safe lift execution.
9. What is the first step in rigging a load?
A) Inspect slings and hooks
B) Lift the load immediately
C) Attach slings without inspection
D) Move the load
Rationale: Rigging equipment must be inspected for damage before use to prevent accidents.
10. Which of the following indicates that a crane is properly set up on outriggers?
A) Level crane and fully extended outriggers
B) Boom fully retracted
C) Load suspended in air
D) Engine running
Rationale: Proper setup ensures crane stability during lifts.
11. When performing a lift, which factor is critical to prevent tipping?
A) Load weight
B) Crane color
C) Operator’s experience only
D) Wind speed
Rationale: Knowing the load weight in relation to crane capacity prevents tipping accidents.
12. Which document provides guidance on crane operation and safety?
, A) Load chart
B) Operator’s manual
C) Fuel log
D) Maintenance schedule
Rationale: The operator’s manual outlines proper operating procedures and safety requirements.
13. What is the safe approach distance from high-voltage power lines for a mobile crane
under 50 kV?
A) 5 feet
B) 10 feet
C) 20 feet
D) 50 feet
Rationale: OSHA specifies minimum distances based on voltage to prevent electrocution.
14. When is it acceptable to lift a load exceeding the rated capacity?
A) During an emergency
B) Never
C) If the operator has experience
D) If the crane is on outriggers
Rationale: Exceeding rated capacity can cause crane failure and is never permitted.
15. Which of the following affects crane stability?
A) Load center distance
B) Tire pressure
C) Engine oil
D) Radio volume
Rationale: The farther the load is from the crane’s center, the less stable the lift.
16. How often must a mobile crane be load-tested according to NCCCO standards?
