All Practice Exams
100+ Free CAAS SAR-66 Module 7 Maintenance Practices Practice Questions
CAAS SAR-66 Basic Knowledge Examination - Module 7 Maintenance Practices (Singapore) practice questions are available now; exam metadata is being verified.
✓ No registration✓ No credit card✓ No hidden fees✓ Start practicing immediately
~70% Pass Rate
100+ Questions
100% Free
Loading practice questions...
Same family resources
Explore More CAAS SAR-66 Aircraft Maintenance Modules
Continue into nearby exams from the same family. Each card keeps practice questions, study guides, flashcards, videos, and articles in one place.
2026 Statistics
Key Facts: CAAS SAR-66 Module 7 Maintenance Practices Exam
80 Qs
Multiple-choice questions in official CAAS B1/B2 M7 exam.
CAAS SAR-66 Appendix 1
100 Mins
Time duration allowed for the examination.
CAAS Airworthiness Circular AC 66-13
75%
Minimum required passing score for each SAR-66 module.
CAAS SAR-66 Regulatory Requirement
S$87.20
Fee per basic subject under ANO 12th Schedule (from 1 Jan 2026).
CAAS Air Navigation Order
10 Subtopics
Syllabus covering 7.1 to 7.10 from safety to documentation.
CAAS SAR-66 Module 7 Syllabus
CAAS SAR-66 Module 7 Maintenance Practices is a 100-minute examination consisting of 80 multiple-choice questions administered by CAAS requiring a 75% pass mark for Singapore Aircraft Maintenance Engineer licensing.
Sample CAAS SAR-66 Module 7 Maintenance Practices Practice Questions
Try these sample questions to test your CAAS SAR-66 Module 7 Maintenance Practices exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1What is the primary purpose of Personal Protective Equipment (PPE) such as safety goggles, ear protectors, and steel-toe boots during aircraft maintenance operations?
A.To serve as the primary engineering control against hangar hazards
B.To act as the last line of defense against personal injury when hazards cannot be eliminated
C.To satisfy administrative checklist requirements without affecting physical safety
D.To eliminate all physical and chemical hazards at the source
Explanation: PPE is designed to act as the last line of defense protecting maintenance personnel from hazards that cannot be fully eliminated through engineering controls or workplace redesign. While engineering controls are preferred, PPE mitigates residual risk during maintenance activities.
2Which class of fire extinguisher is specifically rated for extinguishing electrical fires involving energized avionics equipment without leaving conductive residue?
A.Class A (Water)
B.Class B (Foam)
C.Class C (CO2 or Halon / Clean Agent)
D.Class D (Dry Powder)
Explanation: Class C fires involve energized electrical equipment. Carbon dioxide (CO2) or clean agents (such as Halon/Halotron) are non-conductive, non-corrosive, and leave no residue that could short-circuit or damage delicate avionic circuits.
3When working on aircraft high-pressure hydraulic or pneumatic systems, what safety precaution must be taken before loosening any line or component?
A.Apply maximum system hydraulic pressure to check for minor leaks first
B.Ensure all system fluid and gas pressure is completely depressurized and accumulators are bled
C.Loosen the B-nut rapidly while wearing cloth gloves to catch fluid spray
D.Disconnect electrical power from the aircraft without bleeding mechanical accumulators
Explanation: High-pressure fluid or gas trapped in lines or accumulators can cause severe fluid injection injuries or violent component ejection. Technicians must verify complete depressurization and bleed hydraulic accumulators before breaking any pressure connection.
4What is the primary hazard associated with entering fuel tanks or confined spaces during aircraft structural maintenance?
A.Excessive illumination and thermal radiation
B.Atmospheric hazards including oxygen deficiency, toxic vapor accumulation, and explosive fuel air mixtures
C.High levels of ionizing radiation from fuel probes
D.Hydraulic lock of entry access panels
Explanation: Confined spaces in aircraft fuel tanks present acute hazards of oxygen depletion, flammable fuel vapor concentrations within explosive limits, and toxic hydrocarbon vapor inhalation. Continuous ventilation and gas testing are mandatory.
5During aircraft jacking operations, what critical safety step must be performed before technicians begin working beneath the aircraft?
A.Rely entirely on hydraulic jack pressure without installing mechanical lock collars
B.Thread down and engage mechanical lock collars on all tripod jacks and insert safety pins
C.Release hydraulic pressure to test jack seals while technicians are under the wing
D.Jack the aircraft on sloping apron surfaces to improve fluid drainage
Explanation: Hydraulic jacks can experience seal failure or pressure loss. Engaging mechanical lock collars (or lock rings) directly against the jack cylinder prevents aircraft collapse in the event of hydraulic failure.
6What safety precaution is mandatory when handling aircraft nickel-cadmium (Ni-Cad) and lead-acid battery servicing in workshop areas?
A.Maintain completely separate servicing areas and tools to prevent electrolyte cross-contamination
B.Mix lead-acid sulfuric acid with Ni-Cad potassium hydroxide to neutralize spilled electrolyte
C.Store and charge both battery types on the same workbench to equalize shop temperature
D.Use identical non-insulated steel tools for servicing both electrolyte types
Explanation: Potassium hydroxide (alkaline electrolyte in Ni-Cad batteries) and sulfuric acid (acid electrolyte in lead-acid batteries) chemically neutralize each other, destroying battery capacity and releasing heat/gas. Servicing must be performed in physically separate rooms with dedicated tools.
7What precaution must be taken regarding Foreign Object Debris (FOD) after completing structural maintenance inside an engine intake duct?
A.Perform a 100% tool count and physical audit of the duct to verify zero remaining loose items
B.Blow compressed air into the duct towards the compressor stages to clear loose rivets
C.Close access panels immediately without performing a visual inspection to maintain schedule
D.Leave extra clecos inside the duct for future maintenance access
Explanation: FOD in engine intake ducts causes catastrophic compressor blade destruction upon engine startup. Technicians must perform formal tool reconciliation and thorough tactile and visual duct inspections before closure.
8Which type of respirator filter cartridge is required when spraying polyurethane aircraft paint containing toxic isocyanates?
A.A simple dust/particulate paper mask
B.A supplied-air (fresh air) breathing apparatus or chemical organic vapor cartridge specified for isocyanates
C.An N95 particulate mask without organic vapor filtration
D.A welding fume filter mask
Explanation: Isocyanates in polyurethane paints cause severe respiratory sensitization and asthma. Standard particulate masks offer zero protection against organic vapors; positive-pressure supplied-air respirators (or specialized chemical cartridges) are required.
9When towing an aircraft on the apron, what is the responsibility of the brake rider seated in the cockpit?
A.Apply the aircraft parking brake continuously during towing to assist tow tractor traction
B.Monitor wingtips and steer the nosewheel manually while under tow
C.Remain alert to apply aircraft brakes immediately if the towbar disconnects or on command from the tow supervisor
D.Operate aircraft engine thrust reversers to stop the tow vehicle
Explanation: The brake rider must maintain vigilance, monitor system hydraulic pressure for emergency braking, and apply brakes only if emergency stopping is commanded or if the towbar separates, preventing runaway aircraft movement.
10What safety standard applies when connecting external 400 Hz AC electrical ground power to an aircraft?
A.Ensure the ground power unit (GPU) output switch is OFF before inserting or removing the power cable plug from the aircraft receptacle
B.Plug in the live cable with GPU running at full output voltage to test receptacle contact arc resistance
C.Connect external AC power while aircraft fuel tank venting is in progress in the immediate vicinity
D.Use wet cotton gloves to grip high-voltage GPU cable connectors
Explanation: Plugging or unplugging live 400 Hz electrical connectors under load causes severe electrical arcing, pin erosion, and potential explosion if flammable vapors are present. Power must be switched OFF prior to connector mating.
About the CAAS SAR-66 Module 7 Maintenance Practices Practice Questions
Verified exam format metadata for CAAS SAR-66 Basic Knowledge Examination - Module 7 Maintenance Practices (Singapore) is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.