3272-11 sys (1.16)

For battery charging, the electrical supply connected to the battery must be. AC at 50 c.p.s. DC. AC at 400 c.p.s.

When using A.C. power on the bus bar you require 28V D.C. for battery charging. an A.C. transformer and rectifier would be required. a D.C. transformer and rectifier would be required. an A.C. inverter would be required.

Two similar 12V batteries connected in parallel will produce. 12V e.m.f. with twice the capacity of each battery. 24V e.m.f. with the same capacity as each battery. 24V e.m.f. with twice the capacity of each battery.

If a nicad battery overheats, it is an indication of. the generator voltage regulator setting is too low. thermal runaway. the generator is not connected to the bus bar.

The output from an AC generator is taken from. connections on the stator. slip rings. slip rings via commutator.

Load sharing on a DC generation system is achieved by. circulating currents affecting the carbon pile for voltage trimming. the load differences causing torque signals to vary the engine speed. tachogenerators varying the generators outputs as the engine speed varies.

If a nickel cadmium aircraft battery is not required for immediate service, it should be stored. in the fully discharged condition. in a totally dry condition. in the fully charged condition.

The correct way to determine the state of charge of a nickel-cadmium battery is. by checking the specific gravity of each cell. by a complete discharge and a measured recharge. by checking the voltage of each cell under load.

A DC generator will be connected to the busbar after the RCCO contacts close due to. increasing battery voltage. increasing generator voltage. a differential voltage of 0.5V battery voltage higher than generator.

Spillage of a lead acid electrolyte is detected by. indicating paper that turns blue. litmus paper that turns black. indicating paper that turns red.

To restore electrolyte after spillage. add distilled water only. add a mixture of acid and water of the same s.g. as that in the battery. add acid only.

When a DC generator fails, the pilot will receive the following indications: Zero current on the ammeter and a red PFWL. Rising voltage and current discharge with a red PFWL. An audio bell and red PFWL.

The purpose of an inverter is to convert. DC to AC. AC to a higher frequency AC. AC to DC.

With a vibrating-contact type voltage regulator the adjustment of generator voltage is carried out by. adjustment of voltage coil resistance. alteration of the field resistance. alteration of contact spring tension.

Battery SG is measured using a. hygrometer. hydrometer. hypsometer.

A battery for use on aircraft must have a capacity of. 90%. 80%. 50%.

When connecting aircraft batteries, the last lead to connect is the. positive earth. positive. negative.

Polarization in a cell is. the fact that hydrogen bubbles form on the -ve plate. the fact that as a battery discharges, the -ve plate's potential approaches that of the +ve plate's. the establishing of a potential across the cell.

Battery capacity is checked by. discharging at a constant current and checking the time taken to reach the discharged state. measuring the terminal voltage whilst on load and multiplying by the current drawn. discharging while maintaining the voltage constant by varying a resistor in the circuit and checking the time to be discharged.

The frequency of an AC generator is dependant on the. field strength and the speed of the generator. number of pairs of poles and the speed of the rotor. number of conductors and the field strength.

To adjust the voltage output of an AC generator, whilst maintaining constant frequency, it is necessary to. alter the driving speed. alter the field current. alter the reactance of the stator winding circuit.

In a paralleled AC generation system load sharing is for. reactive load only. real load only. real and reactive load.

Single phase components in a 3 phase system may be connected between. any phase and earth or between any two phases. phases A and B only. the phase and earth only.

A frequency wild supply would be suitable for. deicing loads. 3-phase torque motors. instruments and navigation systems.

Three 12V, 40Ah accumulators in series would give. 36V 40Ah. 12V 120Ah. 36V 120Ah.

Three 12V, 40Ah accumulators in parallel would give. 36V 120Ah. 12V 120Ah. 12V 40Ah.

An inverter can be an AC generator driven by. a DC motor. an AC motor. either an AC or DC motor.

When mixing electrolyte for lead acid batteries. add water to acid. the method of mixing is unimportant. add acid to water.

The RPM of a 6 pole, 400 Hz alternator is. 6000. 8000. 4000.

The ratio between apparent power and true power is the. power rating. efficiency. power factor.

Apparent power is measured in. Volt Amps. Kilovolts. Watts.

A Ni-Cad battery consists of 19, 1.2 volt cells. What will be the nominal battery output?. 24V. 22V. 20V.

The preferred method of battery charging a Ni-Cad battery is constant. voltage. speed. current.

When operating two AC generators unparalleled, the phase of each. must be in opposition to one another. is unimportant. must be synchronized.

When the GPU is connected to the aircraft. it is not paralleled with the aircraft generator. it is paralleled with the aircraft generator. it supplies essential services.

A lead-acid battery with 12 cells connected in series (no-load voltage = 2.1 volts per cell) furnishes 10 amperes to a load of 2 ohms resistance. The internal resistance of the battery in this instance is. 5.0 ohms. 0.52 ohms. 2.52 ohms.

The rating of an aircraft alternator is 40 KVA at PF 0.8 lagging.. The maximum load under all conditions is 40KW.. The maximum load under all conditions is 40KVA.. The maximum load permitted is 32KW.

An I.D.G (integrated drive generator). incorporates the alternator and CSD as one unit. has separate CSDU. does not require a CSDU.

A P.M.G (Permanent Magnet Generator) is a small built in generator which. provides initial excitation. only rotates during starting. only rotates after starting.

To parallel an alternator with another alternator the alternators must have the same. frequency, RPM and phase relationship. frequency, voltage and phase relationship. frequency, RPM and speed.

Speed of an alternator may be controlled by. keeping engine rpm constant. varying the field current. CSDU (constant speed drive unit).

Frequency wild' alternators supply. resistive circuits. inductive circuits. capacitive circuits.

The real load of an alternator is directly related to. output shaft rpm. output voltage. output shaft torque.

How is initial voltage build-up ensured in a brushless generating system, before full output is available from the voltage regulator?. Permanent magnets are mounted between the exciter field poles. A switch must be operated by the crew to provide excitation form the dc busbar to bring generator on line. Excitation from the DC busbars is automatically provided during the start sequence.

Insulation resistance of electrical machines is. normally lower when the machine is hot. not affected by change of temperature of machine. normally higher when the machine is hot.

The purpose of a thermistor in a brushless AC generator is to. keep the resistance of the rectifiers nearly constant at varying temperatures. compensate for temperature changes in the main AC stator windings. keep the exciter field resistance nearly constant at varying temperatures.

The term 'random paralleling' means the incoming alternator's output voltage frequency and phase relationship is. the outputs are constant. the same. not the same.

One lamp is connected across corresponding phases of two alternators. They will be synchronised when. the lamp is extinguished. the lamp is either at maximum brightness or is extinguished. the lamp is maximum brightness.

Automatic synchronising means that the incoming alternator's voltage and frequency. can be synchronised using the two lamps provided at the system's panel. can be checked at the system's electrical panel by selecting the relevant alternator. cannot be checked.

The danger of random paralleling is the possibility of. ground power disconnection. disconnection of the other alternators. crash engagement.

What is monitored in a constant speed drive?. High oil temperature and low oil press. Low oil press and CSD speed. Low oil temperature and low oil press.

The CSD or IDG speed governor setting. is not allowed to be adjusted. is adjusted with the engine stationary. is adjusted with the engine running.

An external ground power supply can be used for. only the emergency busbar services. all normal services required by flight and ground crew. only the ground handling busbar services.

The APU generator can normally be. connected in parallel with the aircraft's main generators. used during flight as a back up supply if the main aircraft supply fails. connected in parallel with the ground power supply.

The impedance on a run of co-axial cable is. inversely proportional to the length of cable. proportional to the length of cable. not affected by length of cable.

Galley loads are supplied from the. main bus bar. ground service bus. battery bus bar.

A ni-cad battery is stored in the. dry condition. fully charged condition. fully discharged condition.

A 6-diode Transformer Rectifier Unit (TRU) changes. single phase AC to direct current. direct current to AC. three phase AC to direct current.

A frequency wild AC generator is used for. deicing loads. fluorescent lights. instruments.

What should you do if the electrolyte is found to be low in one cell of a lead acid battery?. Replace the defective cell. Top-up the individual cell with distilled water. Cell is defective, replace the battery.

What is the purpose of the diode on a contactor?. Prevent spikes. Prevent bounce. To prevent current going the wrong way.

Megaphones must be stowed so they can withstand an inertia force of. 9g. 15g. 12g.

The cylinder in a life jacket is inflated using. compressed air. CO2. nitrogen.

Toilets must have a smoke detection system. that gives a warning light in the cockpit. connected to a pump to pump the smoke out. that gives a warning light in the cockpit and an aural warning in the main cabin.

If seat belt stitching is worn, where are the replacement stitches placed?. Over the originals. Diagonally. Alongside the original.

Type and Quantity of emergency equipment to be carried is specified in which document?. Schedule 4 of the ANO. CAAIPs Leaflet 5-7. Airworthiness Notice 79.

Life jackets are inflated with cylinders of. Nitrogen. air. CO2.

After a successful ditching, the liferafts deployment will. have detailed instructions in a booklet in a seat pocket. be briefed by the cabin crew. be rapid and obvious with easily and readily displayed instructions adjacent to the liferafts.

Cargo and baggage compartments in which a fire is completely confined come under. Class B. Class C. Class D.

How do you clean seat belts?. With MEK. With white spirit. With warm water with low alkalinity soap.

A pilot's safety harness buckle and adjustment strap is. not allowed to slip under any forces. allowed to slip if vertical acceleration exceeds 5G. allowed to slip if side loads exceed 2.5 G.

How often are life jackets inspected?. Every 12 months. In accordance with the AMM. In accordance with the manufacturers specification.

Inspection proof testing of seat-belts is carried out to. 4.5g. 9g. 0.5g.

Where would you find information regarding galley equipment?. BCARs. ANO. AWN 99.

Where the aircraft passenger seating capacity exceeds 149 but less than 200 then: 1 megaphone is required. 3 megaphones are required. 2 megaphones are required.

Where would you find information on life-raft deployment?. Cabin safety on-board card. Cabin operations manual. JARs.

When testing emergency slide bottles. any pin could be checked by connecting directly to ground. one pin must be grounded to the cartridge body at one time. all three pins must be shorted together and grounded to the cartridge body.

The minimum passenger aisle width for an aircraft with a seating capacity of 20 or more is. 15 inches. dependant upon aircraft type. 24 inches.

Aircraft emergency escape slides are usually pressurised with. helium. CO2. oxygen.

The CO2 in a life raft is released. manually. on contact with water. electrically.

Vertical projected separation between seat rows must be. 5 inches. 4 inches. 3 inches.

What is the minimum distance between a seat cushion and the seat in-front of it?. 10 inches. 7 inches. 5 inches.

A galley catering trolley with electrics is classed as. a controlled item. an uncontrolled item. neither, as it is removable.

What placard must be visible above a waste paper bin in a toilet?. No Naked Flame. No Smoking. No Cigarettes.

Attendant call is achieved by pressing a button on the passenger service unit (PSU). To reset the light. the button is pulled out. a reset switch on the attendants panel is operated. the button is pushed again.

Hot fluids in an aircraft galley must have closed container lids at temperatures above. 45°C. 65°C. 55°C.

The 'fasten seatbelt' light switch should be in reach of the. captain. first officer. both the captain and the first officer.

What is the EASA regulation of the minimum separation between a seat and another seat or structure?. 10 inches. There is no EASA guideline. 7 inches.

What is the minimum separation between a seat back cushion and another seat or fixed structure?. 26 inches. 24 inches. 28 inches.

With regard to forward/rearward passenger seat installation. you can only fit seats as stated in the Declaration of Design and Performance (DPP). you can fit seats facing forward or rearward. you can only fit seats facing forward.