This set of Aircraft Maintenance Multiple Choice Questions & Answers (MCQs) focuses on “Aircraft Electronics – Spoilers”.
1. Spoilers may also be differentially operated for roll control in place of______
Explanation: The spoilers may also be differentially operated for roll control in place of ailerons. Such spoilers were first developed in 1948 by Martin Aircraft.
2. A spoiler may also be called as ______
a) Lift dumper
b) Lift enhancer
c) Thrust dumper
d) Thrust enhancer
Explanation: A spoiler may also be called a lift duper, or lift spoiler. It is a device placed to intentionally manipulate the lift component of an airfoil in a controlled way.
3. Spoilers work differently from airbrakes.
Explanation: True, spoilers on an aircraft work differently as compared to airbrakes. Spoilers are responsible for reducing lift, on the contrary airbrakes have no effect on the lift of an aircraft.
4. Which of the following is not true about spoilers?
a) Create a controlled stall
b) Decrease descent rate
c) Placed on wings
d) Reduce lift
Explanation: Spoilers help in increasing descent rate without increasing speed. These devices create a controlled stall over the portion of the wing behind it.
5. Where are the spoilers placed on an aircraft?
a) On the top surface of a wing
b) On the bottom surface of a wing
c) On the top surface of an engine
d) On the bottom surface of an engine
Explanation: In an aircraft, the spoilers are placed on the top surface of a wing. They are plates which can be extended upward into the airflow to spoil it.
6. How is the airspeed affected in a descent without spoilers?
a) Set to zero
b) No affect
Explanation: The airspeed is increased when an aircraft descends without spoilers. Further, the engine will be at low power thus producing less heat than normal.
7. Which of the following spoilers are used for descent control?
a) Inboard spoilers
b) Outboard spoilers
c) Mid span spoilers
d) Fixed spoilers
Explanation: For descent control in an aircraft, inboard spoilers are used. Further, when roll control is required, the aircraft makes use of outboard spoilers, which may also be referred to as mid span spoilers.
8. Which of the following position is selected for lift dumpers on landing approach?
Explanation: Automatic position is selected for lift dumpers on landing approach. These devices are deployed in a fraction of a second at the moment of touchdown.
9. What is the combination of spoilers and ailerons called?
Explanation: The combination of spoilers and ailerons is called spoilerons. These devices also avoid the problem of control reversal that affects ailerons.
10. Spoilers increase the lift component of an airfoil.
Explanation: False, spoilers reduce the lift component of an airfoil. This reduction is done in a controlled way by altering the airflow over an aircraft wing.
Sanfoundry Global Education & Learning Series – Aircraft Maintenance.
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