1. Preflight inspection is conducted by __________
a) Copilot
b) Pilot
c) Purser
d) Ground staff
Explanation: Pilots are required to follow up with their own pre flight Inspection. The pre flight inspection follows a checklist listing items that the pilot is to visually check for general condition as he or she walks around the airplane.
2. What is the full form of LRU?
a) Line-replaced unit
b) Line-repositioned unit
c) Line-rested unit
d) Line-replaceable unit
Explanation: LRU refers to Line-replaceable unit. The LRUs are aircraft components that are designed such that they can be replaced easily at a site. They are helpful in ensuring that the aircrafts do not go out of service due to a technical snag.
3. Which one of the following is not true with respect to LRU?
a) Increases system costs
b) Improves quality
c) Can be stocked
d) Can be replaced quickly
Explanation: LRUs are helpful in bringing down repair and overhaul costs and help improve quality. Such units can be easily replaced in no time and help reduce flight delays by ensuring on time departure.
4. How much time is required for line maintenance?
a) 45 minutes
b) 450 minutes
c) 45 hours
d) 450 hours
Explanation: Line maintenance is a 45 minutes task during which the aircraft is refueled and all critical instruments are checked for defects.
5. Line maintenance can be both, scheduled or unscheduled
a) true
b) false
Explanation: Line maintenance includes both, unscheduled and scheduled maintenance activities. Unscheduled maintenance activities are caused due to unforeseen activities and the scheduled maintenance activities are vital to ensure the aircraft’s airworthiness.
6. Line maintenance is less extensive than Heavy maintenance.
a) true
b) false
Explanation: Line maintenance tasks are to be performed quite frequently. For most aircrafts, line maintenance includes daily checks, which are performed about every 24 to 48 hours. Although performed more frequently than heavy maintenance, line maintenance is not as extensive as heavy maintenance.
7. Line Maintenance is also known as _________
a) Heavy Maintenance
b) Electrical Maintenance
c) General Maintenance
d) Routine Maintenance
Explanation: Line maintenance is also known as routine maintenance as it is done every day or at most once a week. Unlike heavy maintenance, line maintenance does not require much time and manpower
8. What is considered an aircraft cycle?
a) Takeoff and landing
b) Landing
c) Takeoff
d) Flying hours
Explanation: The occurrence of aircraft maintenance checks varies by the cycle count or the number of hours flown since the last check. Aircraft cycle count refers to the takeoff and landing.
9. Preflight inspection is a part of __________
a) Landing
b) Base Maintenance
c) Takeoff
d) Line Maintenance
Explanation: The pilots are required to conduct their own preflight Inspection. The pilot also takes an external inspection of the aircraft to check its airworthiness. This inspection is a part of the line maintenance.
10. How many pressurization cycles can a Boeing 747 endure?
a) 3500
b) 350
c) 35000
d) 35
Explanation: A Boeing 747 can endure about 35,000 pressurization cycles, post that metal fatigue sets in and the aircraft requires to undergo heavy maintenance and overhaul.