SAFETY AND CONTROL DEVICES ,Fuses And Circuit Breaker

Safety Devices

To protect electrical system from damage and failure caused by excessive current, several kinds of protective devices are installed in the systems.

Circuit Breaker

It is a device which breaks the circuit and stops the current flow whenever the current exceeds a predetermined value.

 

Video

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What Is Lift ? How Aircraft Fly

Lift

Force perpendicular to relative airflow and acting opposite to the force of gravity.

Aerofoil

 is a curved or cambered surface designed to produce lift when driven through the air.

Bernoulli's

The principle states that within a steady airflow of constant energy.

 

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What is Thermocouple ? Construction Of Thermocouple

 Thermocouple:

A kind of thermometer, a thermoelectric device used for measuring temperature, usually at high temperatures Thermocouples are simple and rugged, can be used over a wide range of temperatures        (from -200° C. to 1,600°C.)x

 Video about How thermocouple work 

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M-8 Basic Aerodynamics Final Practice Test [20 Question and 25 Minutes]

Module 08. Basic Aerodynamics

Final Practice Test

  

 

1. If gauge pressure on a standard day at sea level is 25 PSI, the absolute pressure is ?
   1.   39.7 PSI
   2.   10.3 PSI
   3.   43.8 PSI
2. What is sea level pressure?
   1.   1012.3 mb
   2.   1013.2 mb
   3.   1032.2 mb
3. How does IAS at the point of stall vary with height?
   1.   It decreases
   2.   It is practically constant
   3.   It increases
4. As altitude increases, pressure ?
   1.   decreases exponentially
   2.   decreases at constant rate
   3.   increases exponentially
5. Wing tip vortices are strongest when ?
   1.   flying high speed straight and level flight
   2.   flying into a headwind
   3.   flying slowly at high angles of attack
6. Elevons combine the functions of both ?
   1.   rudder and elevator
   2.   elevator and aileron
   3.   rudder and aileron
7. When the trailing edge flaps are lowered, the aircraft will ?
   1.   pitch nose up
   2.   pitch nose down
   3.   sink
8. The aircraft is controlled about the lateral axis by the ?
   1.   ailerons
   2.   elevator
   3.   rudder
9. As height increases, with angle of attack and speed constant ?
   1.   lift will remain constant
   2.   lift Increases
   3.   lift decreases
10. A 'slug' is a unit of ?
    1.   mass
    2.   density
    3.   volume
11. A yawing motion provides what kind of Stability?
    1.   Directional
    2.   Lateral
    3.   Longitudinal
12. Azimuth stability is dependent on ?
    1.   dihedral
    2.   keel and fin
    3.   tailplane
13. An elevator trim tab is used to ?
    1.   counteract propeller torque
    2.   prevent the control surface from stalling the airflow
    3.   reduce control column forces on the pilot
14. The fin gives stability about which axis?
    1.   Longitudinal axis
    2.   Lateral axis
    3.   Normal axis
15. Dutch Roll is ?
    1.   primarily a pitching instability
    2.   a combined rolling and yawing motion
    3.   a type of slow roll
16. Dihedral wings combat instability in ?
    1.   yaw
    2.   side-slip
    3.   pitch
17. Over pitch causes ?
    1.   an increase in RPM
    2.   a reduction in RPM
    3.   blades to cone up
18. When an aerofoil stalls ?
    1.   lift and drag increase
    2.   lift decreases and drag increases
    3.   lift increases and drag decreases
19. Lift in a helicopter is a result of ?
    1.   pitch * square root of speed
    2.   angle of attack * velocity squared
    3.   angle of attack * velocity squared and forward speed
20. Tail rotor effects the helicopter in ?
    1.   pitch and roll
    2.   vertical axis
    3.   horizontal axis

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Important and Basic Aviation Definitions

Certifying staff: 

personnel responsible for the release of an aircraft or a component after maintenance. 

Component:

any engine, propeller, part, or appliance. 

Continuing airworthiness: 

all of the processes ensuring that, at any time in its operating life, the aircraft complies with the airworthiness requirements in force and is in a condition for safe operation.

 

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Main Parts Of Aircraft Fuselage, wing, Aileron, Elevator, Rudder ,Flaps, and Landing Gear

The main flight control surfaces on a fixed-wing aircraft include:

• 1.      Ailerons

• 2.       Elevators

• 3.       Rudder

Ailerons (longitudinal axis)

The Primary Control surface ailerons are attached to the trailing edge of both wings and when they move, they rotate the aircraft around the longitudinal axis. (longitudinal axis)

 

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What Is Light Emitting Diode (LED) ?

A SIMPLE explanation of Light Emitting Diodes (LEDs). We go over the working of LEDs, how LED lights work – plus an LED working principle animation

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