NEW
Font size
WorksheetsElectrical Engineering Quiz
Total questions: 40
Worksheet time: 20mins
What does Ohm’s law state?
Current through a conductor is directly proportional to the voltage applied to that conductor and inversely proportional to the resistance of the conductor.
Resistance through a conductor is directly proportional to the voltage applied to that conductor and inversely proportional to the current of the conductor.
Current through a conductor is directly proportional to the resistance of that conductor and inversely proportional to the voltage applied of the conductor.
Residual voltage is the result of magnetism in the?
Armature
Pole shoes
Field windings
If a generator is malfunctioning, its voltage can be reduced to residual by?
Actuating the master solenoid.
Turning the generator master switch to the OFF position.
Actuating the rheostat.
The most effective method of charging a NiCD battery is?
Constant Voltage
Constant Current
Constant Resistance
What is the reason for flashing the field in a generator?
Increase the capacity of the generator.
Remove excessive build-up of dust from brushes.
To restore correct polarity and/or residual magnetism to the field poles.
What is a spring loaded, off center, relay called?
Spring relay.
Remote relay.
contactor
How does a voltage regulator change the voltage output of a generator?
By changing the current in the generator output circuit.
By changing the resistance of the generator field circuit.
By changing the resistance in the generator output circuit.
By changing the voltage in the generator field circuit.
What is the advantage of a starter-generator?
To save weight by combining two devices, starter and generator, into one device.
To save cost by combining two devices, starter and generator, into one device.
There is no such device.
To increase the efficiency of the generator.
What are the two effects of electron flow through a conductor?
A magnetic field and heat.
A magnetic field and fluctuating DC.
An AC field and heat.
A magnetic field and light.
How can the electrolyte in a lead acid battery be protected from freezing?
Remove the battery and keep it under constant charge.
Place the aircraft in a hangar.
Ensure the battery is fully charged.
Add antifreeze to the electrolyte.
ELMS is a definition for?
Electrical Load Maintenance System
Electrical Load Management System
Electrical Load Monitor System
Dry charged cell lead acid batteries are also know as?
Lead Acid
flooded or wet batteries
Ni-Cad Batteries
Troubleshooting aircraft circuits, it is always valuable to consider Ohm's Law?
Law was named after German Physicist George Simon Ohm
Ohm's law is of little to no use in troubleshooting
Remembering that a low resistance means increased current and can explain why circuit breakers pop or fuses blow.
Ligther than copper, and is often used when the weight factor is important?
silver
copper
aluminum
BPCU uses contactors for connections to various circuits, contactors are called
BTB bus tie breakers
GCU generator control unit
TBC tie bus controller
Two electromagnetic switches are?
Solenoid/Relay
Relay/Micro Switch
Micro Switch/Limit Switch
When installing terminal lugs, the maximum permissible lugs on any one stud is?
three lugs plus a common bus bar
four lugs, plus a common bus bar
only one terminal lug
What causes Thermal Runaway in NiCd Battery?
Thermal runaway has been eliminated with VRLA Battery
a combination of high battery temperature and overcharging
low temperature condition, and cell imbalance
the allowable voltage drop of main wires
should not exceed 5 percent
should not exceed 3 percent
Should not exceed 2 percent
Lead Acid batteries are charged how
Constant Charge
Constant Voltage
Constant Polarity
NiCd battery are charge how
Constant Voltage
Constant Polarity
Constant Current
Primary purpose of conduit is for
mechanical protection of cables or wire
to eliminate the need for clamps or wire tie
to route wires around in aircraft fuel tanks
how does the BPCU monitor the complete electrical system?
with current limiters, zener diodes
with remote current sensors known as current transformers
by controlling the GCU
Junction boxes are used in high-temperature areas, should be made out of
T-24 Aluminum
T-6 Aluminum
Stainless Steel
What materials have few free electrons
Conductors
Insulators
Semiconductors
Current limiters are high amperage fuses that isolate buses when
short circuit occurs
alternator output has exceeded the specifications
the battery amp hour rating is insufficient during starter operation
2 ways to protect electrical systems from faults
Circuit Breakers and Fuses
GCU and BPCU
Mechanically and Electrically
Primary effect of a coil is its property to oppose any change in current through it, is called
Magnetic induction
mutual induction
Inductance
What semiconductor device will allow current flow in one direction but not the other
Diode
FWD Bias
Depletion Area
type of generator never employed as an airplane generator
Series
Compound
Shunt
Backshell adapters designed for shield termination are used for?
ESD/EMF
EMI/RFI
CSD/GCU
While starting the engine, the starter can often draw 100 or more amperes, for this reason
all starter motors must be brushless DC starters
all starter motors are controlled through a solenoid
all starters must be shunt wound starters
One HZ equals one
RPM
Frequency
CPS
Bonding is defined as
getting closer
P diddy
electrical connecting of two or more conducting objects not otherwise adequately
DC alternators contain two major components
commutator/field winding
armature/commutator
armature winding/field winding
Common example of twisting wires
wires should never be twisted
wires should always be twisted
wiring near magnetic compass or flux valve, three-phase distribution wiring, or radio wiring
what is a RAT?
resistance from alternating current transformers
Ram Air Turbine
Rectified Alternating Current
What conductors are used to transmit and receive radio frequency waves
Antennas
Coaxial
Coaxial Inductors
GCU is defined as
Generator Current Unit
Generator Contact Unit
Generator Control Unit
What allow the DC generator to produce DC output?
full wave rectifier
slips rings
commutator action
