10 Questions

Questions – General 2

		1.	In a direct current generating system the voltage regulator controls the system
			voltage within prescribed limits:
			a.	regardless of varying engine RPM and electrical load by inserting a variable
				resistance in the generator field winding
			b.	by means of a relay which closes contacts in the output circuit when a
				prescribed voltage is reached
			c.	of the generator rotor speed
			d.	by a variable resistance which limits the voltage given by the battery
		2.	A generator cut-out is fitted:
			a.	to isolate the battery on touchdown
			b.	to prevent the battery from being overcharged
			c.	to allow the generator to be isolated in a crash
	10		d.	to prevent the battery feeding back into the generator when its voltage is
				above the generator voltage
	Questions
		3.	A generator cut-out contacts will close:
			a.	with an increase in battery voltage
			b.	with an increase in generator voltage
			c.	at flight idle only
			d.	with an increase in generator current
		4.	Failure of an aircraft generator is indicated by:
			a.	a red warning light lighting and the ammeter showing zero or discharge
			b.	a red warning light going out and the ammeter showing a discharge
			c.	a current limiter tripping
			d.	a circuit fuse blowing
		5.	On a twin-engine aircraft with a generator fitted to each engine, if the starboard
			generator fails,:
			a.	the fuel cross feed cocks close
			b.	the starboard engine cuts (stops)
			c.	the port engine will cut
			d.	both engines will run normally
		6.	On an earth return aircraft wiring circuit:
			a.	the negative pole is connected to the aircraft structure
			b.	the positive pole is connected to the aircraft structure
			c.	the negative pole is connected to the positive pole
			d.	two fuses are needed
		7.	In a dipole aircraft wiring circuit if the conductors are bridged:
			a.	an item of electrical equipment would be burned out
			b.	no immediate action is necessary
			c.	the item of electrical equipment would operate normally
			d.	the fuse or circuit breaker in that circuit will blow

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			Questions		10
	8.	A circuit breaker that has tripped due to overload:
		a.	cannot be reset unless the circuit has returned to normal
		b.	will not be able to be reset in the air
		c.	will reset itself when the circuit returns to normal
		d.	must be replaced
	9.	When changing a blown fuse:
		a.	it is changed with one of a lower rating
		b.	the press to reset button is operated
		c.	leave circuit switched on
		d.	it is changed with one of the correct rating
	10.	As the speed of an electric motor increases the back EMF will:
		a.	remain the same
		b.	fluctuate	10
		c.	increase
		d.	decrease		Questions
	11.	The output of a shunt wound generator:
		a.	will rise gradually as load is applied
		b.	will remain constant as load is applied
		c.	will vary with generator speed
		d.	will fall gradually as load is applied
	12.	Load shedding is:
		a.	increasing circuit resistance
		b.	transferring the loads between generators
		c.	reducing the load voltage
		d.	overall reductions of the loads on the system
	13.	An inertia switch on an aircraft will operate:
		a.	when selected by the pilot or flight engineer
		b.	automatically in flight
		c.	during an emergency or crash landing
		d.	in flight only
	14.	The purpose of electrical bonding on aircraft is:
		a.	to directly earth the positive lead
		b.	to prevent compass malfunctioning and to gather local static charges
		c.	to isolate all components electrically and therefore make the static potential
			constant
		d.	to provide a low resistance path for earth return circuits and safely dissipate
			local static charges and lightning strikes
	15.	Electrical components of aircraft systems are screened to:
		a.	bond the circuit to reduce risk of fire
		b.	prevent them interfering with the function of radio equipment
		c.	prevent short circuits interfering with aircraft equipment
		d.	prevent engine malfunctions

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10

Answers 10

Answers

Answers – General 1

1	2	3	4	5	6	7	8	9	10	11	12
c	d	a	c	c	c	d	a	d	a	c	b
13	14	15	16
d	c	a	b
Answers – General 2
1	2	3	4	5	6	7	8	9	10	11	12
a	d	b	a	d	a	d	a	d	c	b	d
13	14	15
c	d	b

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AC ELECTRICS

ATPL GROUND TRAINING SERIES

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11 AC Electrics -Introduction to AC

AC to Introduction - Electrics AC 11

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