1. Airlines and other commercial operators of large or turbine-powered aircraft follow a continuous inspection program approved by the __________
a) EASA
b) DGCA
c) CASA
d) FAA
Explanation: The continuous inspection program is approved by the Directorate General of Civil Aviation (DGCA) in India or by other airworthiness authorities such as Federal Aviation Agency (FAA) in the USA, Civil Aviation Safety Authority (CASA) in Australia or the European Aviation Safety Agency (EASA) in Europe
2. Category B-check is performed at a __________
a) Hangar
b) Apron
c) MRO site
d) Parking bay
Explanation: Category B-check needs about 150 man-hours and is usually performed within 1-3 days at an airport hangar. This check cannot be performed at the apron, like the Category-A check.
3. How many checks are there in the base maintenance cycle?
a) 2
b) 16
c) 10
d) 6
Explanation: The base maintenance cycle consists of six checks. These six checks are often referred to as C1, C2, C3, C4, C5 and C6 checks. These checks are a part of the base maintenance of an aircraft.
4. Which one of the following is not true with respect to base maintenance?
a) Costlier than line maintenance
b) Greater man power required
c) Requires smaller space
d) More extensive than line maintenance
Explanation: Base maintenance usually demands greater man-hours and it can generally take up to 8 weeks to complete, depending on the aircraft and the number of technicians involved. It also requires the most space of all maintenance checks, and as such must be performed at a suitable maintenance base.
5. D-checks are unscheduled.
a) true
b) false
Explanation: No, D-checks are scheduled checks. These checks require a significant amount of manpower and equipment and are performed at a suitable MRO site, thus need to be planned well in advance.
6. How much time is required for C-check?
a) 2 weeks
b) 2 months
c) 2 days
d) 2 years
Explanation: C-check requires lesser space and manpower as compared to D-check. Such checks usually require up to 6000 man hours and are performed at a hangar or indoor facility
7. Base maintenance is more extensive than Line Maintenance.
a) true
b) false
Explanation: Line maintenance tasks are to be performed quite frequently. In many aircraft types, typical line maintenance tasks include a daily check, however in base maintenance, a greater number of technicians and equipment are involved
8. D-Check is also known as __________
a) Heavy Maintenance Visit
b) Light Maintenance Visit
c) Regular Maintenance Visit
d) Unscheduled Maintenance Visit
Explanation: D-check occurs approximately every 5–6 years. During a D-check, more or less the entire aircraft is taken apart for inspection and overhaul purposes. It is the most extensive aircraft maintenance check and maybe referred as Heavy Maintenance Visit
9. Airframe of an aircraft is its __________ structure.
a) Electrical
b) Mechanical
c) Thermal
d) Hydraulic
Explanation: The airframe of an aircraft is its mechanical structure. The airframe comprises of the fuselage, wings, and undercarriage and excludes the propulsion system.
10. Why does the landing gear retract into the wings and/or fuselage during flight?
a) To decrease drag
b) To increase airspeed
c) To decrease airspeed
d) To generate more thrust
Explanation: Aircrafts have landing gear that retract into the wings and/or fuselage to decrease drag during flight. Drag slows down the aircraft, thus increasing the flying time between two places.