Module 3: Aeronautical Engineering

Fatigue testing determines the response of a material to

• cyclic loads

• temperature

• constant loads

• all of the above

Bernoulli's principle is best described as

• air pressure increases with altitude

• air pressure decreases with altitude

• objects float based on their displacement

• where fluid velocity is high, pressure is low

Jet engines are

• gas turbines

• orbital engines

• propeller driven

• internal combustion engines

Dynamic pressure is

• always zero

• total pressure plus pitot pressure

• total pressure plus static pressure

• total pressure less static pressure

Polymers may be described as

• allotropic

• isothermal

• organic macro-molecules

• inorganic micro-molecules

Magnetic particle testing identifies cracks

• within polymer welds

• on surfaces of all ferrous metals

• on surfaces of magnetic materials

• within interiors of aluminium components

Identify the appropriate lift-t0-drag ratio if an aircraft requires 1 500 kN of lift with an attendant drag of 100 kN.

• 1 : 15

• 10 : 1

• 15 : 1

• 150 : 1

For the aircraft illustrated, maintaining constant speed and level flight, calculate the drag and lift if the weight is 2.5 tonnes and the thrust is 45 kN.

• Drag = 45 kN

  Lift = 25 kN

• Drag = 20 kN

  Lift = 2.5 t

• Drag = 25 kN

  Lift = 45 kN

• Drag = 45 kN

  Lift = 2.5 t

In an hydraulic system, fluid is supplied under pressure to a mechanism transferring this force into mechanical movement by means of a

• ram

• wing flap

• servo motor

• linear actuator

Advanced fibre-composite materials exhibit their greatest mechanical strength when subjected to

• compression

• shear

• tension

• torsion