South Carolina Airport Ground
Equipment Technician Certification
License Exam Practice Questions And
Correct Answers (Verified Answers) Plus
Rationale 2026 Q&A| Instant Download
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1. What is the primary purpose of a ground power unit (GPU) at an
airport?
A. To tow aircraft
B. To supply electrical power to aircraft on the ground
C. To refuel aircraft
D. To service potable water systems
A GPU provides external electrical power to aircraft when their
engines or auxiliary power units are not running.
2. Which color is typically used to identify high-voltage electrical cables
servicing ground equipment?
A. Black
B. White
C. Orange
D. Green
High-voltage cables are color coded orange for safety and easy
recognition.
,3. Before performing maintenance on a baggage tractor, the technician
must first:
A. Inflate all tires
B. Clean the engine compartment
C. Disconnect the battery and implement lockout/tagout procedures
D. Calibrate the fuel gauge
Lockout/tagout prevents accidental energization during
maintenance.
4. What is the correct fuel type for most tow tractors used in commercial
airport operations?
A. Unleaded gasoline
B. Diesel
C. Kerosene
D. Ethanol
Diesel fuel is commonly used in tow tractors due to durability and
torque requirements.
5. Hydraulic fluid contamination in ground support equipment can cause:
A. Increased tire pressure
B. Component wear and system failures
C. Improved fuel efficiency
D. Reduced friction in brake pads
Contaminants in hydraulic fluid damage seals and moving parts.
6. When checking an aircraft refueler before service, the technician
should first:
A. Check cargo compartment pressure
B. Start the engine
C. Inspect hoses and connections for damage
D. Adjust tire alignment
, Safety inspection of hoses prevents leaks and fire hazards during
fueling.
7. What safety device must always be engaged before performing work
under a raised aircraft servicing platform?
A. Warning lights
B. Tire chocks
C. Safety locks
D. Fuel caps
Safety locks secure elevated platforms and prevent accidental
collapse.
8. A fire extinguisher suitable for fuel fires on aprons is classified as:
A. Class A
B. Class B
C. Class C
D. Class D
Class B extinguishers are designed for flammable liquids like fuel.
9. How often should preventive maintenance be performed on ground
support equipment according to manufacturer guidelines?
A. Once a year
B. Only when equipment fails
C. At intervals specified in the maintenance manual
D. Only after major repairs
Preventive maintenance intervals are based on manufacturer
instructions, not arbitrary schedules.
10. What is the primary risk associated with operating ground
equipment too close to the aircraft fuselage?
A. Increased fuel consumption
B. Potential structural damage to aircraft
C. Improved turnaround times
Equipment Technician Certification
License Exam Practice Questions And
Correct Answers (Verified Answers) Plus
Rationale 2026 Q&A| Instant Download
1. What is the primary purpose of a ground power unit (GPU) at an
airport?
A. To tow aircraft
B. To supply electrical power to aircraft on the ground
C. To refuel aircraft
D. To service potable water systems
A GPU provides external electrical power to aircraft when their
engines or auxiliary power units are not running.
2. Which color is typically used to identify high-voltage electrical cables
servicing ground equipment?
A. Black
B. White
C. Orange
D. Green
High-voltage cables are color coded orange for safety and easy
recognition.
,3. Before performing maintenance on a baggage tractor, the technician
must first:
A. Inflate all tires
B. Clean the engine compartment
C. Disconnect the battery and implement lockout/tagout procedures
D. Calibrate the fuel gauge
Lockout/tagout prevents accidental energization during
maintenance.
4. What is the correct fuel type for most tow tractors used in commercial
airport operations?
A. Unleaded gasoline
B. Diesel
C. Kerosene
D. Ethanol
Diesel fuel is commonly used in tow tractors due to durability and
torque requirements.
5. Hydraulic fluid contamination in ground support equipment can cause:
A. Increased tire pressure
B. Component wear and system failures
C. Improved fuel efficiency
D. Reduced friction in brake pads
Contaminants in hydraulic fluid damage seals and moving parts.
6. When checking an aircraft refueler before service, the technician
should first:
A. Check cargo compartment pressure
B. Start the engine
C. Inspect hoses and connections for damage
D. Adjust tire alignment
, Safety inspection of hoses prevents leaks and fire hazards during
fueling.
7. What safety device must always be engaged before performing work
under a raised aircraft servicing platform?
A. Warning lights
B. Tire chocks
C. Safety locks
D. Fuel caps
Safety locks secure elevated platforms and prevent accidental
collapse.
8. A fire extinguisher suitable for fuel fires on aprons is classified as:
A. Class A
B. Class B
C. Class C
D. Class D
Class B extinguishers are designed for flammable liquids like fuel.
9. How often should preventive maintenance be performed on ground
support equipment according to manufacturer guidelines?
A. Once a year
B. Only when equipment fails
C. At intervals specified in the maintenance manual
D. Only after major repairs
Preventive maintenance intervals are based on manufacturer
instructions, not arbitrary schedules.
10. What is the primary risk associated with operating ground
equipment too close to the aircraft fuselage?
A. Increased fuel consumption
B. Potential structural damage to aircraft
C. Improved turnaround times
