Unit 101 Revision Quiz LO2, 3 & 4

What is a common function of a thermocouple in an aircraft?

• To measure temperature in harsh environments such as the engine.
• To control the electrical power supply to the cockpit.
• To increase the speed of the aircraft by adjusting fuel flow.
• To measure the temperature in the cabin.

Below is an a.c. waveform. What does 1 represent on the diagram.

• Cycle of waveform
• Amplitude of waveform
• Peak to Peak value of waveform
• Frequency of waveform

Below is a diagram of an a.c. waveform. What is 2 on the diagram.

• Cycle of waveform
• Amplitude of waveform
• Peak to Peak value of waveform
• Frequency of waveform

What is the best material to use as a core for an electromagnet and why?

• Hard iron, because it keeps its magnetism for a long time.
• Soft iron, because it loses magnetism quickly.
• Hard iron, because it is a good conductor of electricity.
• Soft iron, because it does not interfere with the electric current.

What is the definition or function of an electric motor?

• An electric motor converts electrical energy into mechanical motion.
• An electric motor stores electrical energy for later use.
• An electric motor converts mechanical energy into electrical energy.
• An electric motor increases the voltage of an electrical circuit.

Pay particular attention to the arrows on the diagram below. Please determine the poles on the magnets and explain what is happening.

• The magnets have opposite poles facing each other, and the arrows show attraction.
• The magnets have opposite poles facing each other, and the arrows show repulsion.
• The magnets have like poles (both North) facing each other, and the arrows show repulsion.
• The magnets have like poles (both South) facing each other, and the arrows show repulsion.

Choose applications of fibre optic technology when used in an aircraft?

• Fuel injection and engine cooling.
• Passenger seat heating and ventilation.
• Communication systems and data transmission.
• Cockpit instrument lighting and inflight entertainment.

What would happen if a conductor is moved within a magnetic field?

• The conductor will become a permanent magnet.
• The magnetic field will disappear.
• Nothing will happen unless the conductor is connected to a power source.
• An electric current is induced in the conductor.

What are the three main components of a battery?

• Magnet, coil, and resistor.
• Anode, cathode, and electrolyte.
• Positive wire, negative wire, and switch.
• Power button, charging port, and case.

What is the purpose of an electrolyte in a battery?

• To allow the flow of electric charge between the anode and cathode.
• To store electrical energy for later use.
• To act as an insulator and prevent current flow.
• To increase the battery's physical strength and durability.