Volume 2 cont.
Card Set Information
Volume 2 cont.
CDC Electrical Environmental Volume
CDC Electrical Environmental
During soldering, apply the proper amount of solder directly to the
How should you remove a component from a printed circuit board?
Which choice best describes a good solder connection?
No pits or holes and has a good concave fillet.
When making wire connections to turret terminals, wrap the wire around the terminal at least
To connect wires or compnent leads to flat perforated terminals, the wrap must be
What is the heaviest duty solding iron you normally use in soldering a printed circuit board?
You should clean the circuit board connection within how long after it has cooled?
How should a clinched-lead terminal lay in respect to the printed circuit pad?
Flat on the pad and in the direction of the printed circuit wiring pattern.
How should you hold a printed circuit board to desolder a component?
What must you do before soldering gold-plated integrated circuit leads?
Remove their gold plating
To clean tinned, lead-plated circuit boards use
a medium-bristle brush and alcohol
When soldering a module-type package to a printed circuit board, ensure the connection is soldered within
You must repair a circuit board condutor if it has a knick that extends what part of it's width?
What angle is used to trim out damaged foil areas of printed circuit boards?
When repairing a damaged terminal on a circuit board, the replacement foil should overlap the connecting circuit conductor by at least
What is an acceptable substitue for silver solder flux?
Borax and Water
When soldering a brass fitting to copper tubing, how far should the inner cone of the torch flame be kept from the work?
At least on-half of an inch
How many BTUs does it take to raise the temperature of 5lbs. of water 5 degrees Farenheight?
If an aircraft temp. indicator shows 40 degrees C, what is the equivalent Farenheit temp?
What happens when gas is trapped in a cylinder and pressure is applied to the piston?
Volume will decrease
When a gas is heated, its pressure will
What is a true statement concerning a permanent magnet?
It keeps it's magnetism
Which of the following is a good insulator?
The intensity of electrical current flow is measured in
What is the total current in a series that has a applied voltage of 24volts and a total resistance of 8ohms?
The basic function of electricity is to
In a series circuit, when 24 volts is applied and total resistance is 6 ohms, what is the amperage?
The total resistance is a parrallel circuit is always
less than the smallest resistance in the circuit
The rule that indicates the direction a current-carrying conductor will move in a magnetic field is the
Right-hand rule for motors
What is the effective electromotive force (EMF) in a motor?
The applied voltage minus CEMF
In a circuit with both coils and capacitors, voltage and current will be
out of phase
AC generators operate on the principle of
One disadvantage of the electrolytic capacitor is that
it has a high-power loss
Transformers in low-frequency circuits require a
core of low-reluctance magnetic material
The extent to which the primary's magnetic lines cut across the secondary is expressed as
coefficient of coupling
AC power is connected directly to what part of an induction motor?
The current in a two-phase induction motor is
90 degrees out of phase
The difference between the speed of the stator's rotating magnetic field and the rotor is called
Which of the following is a true statement concerning normal operation of a transistor?
The collector-base junction is reverse biased
How does the movement of majority carriers in a PNP transistor compare with that in an NPN?
They move from emitter to collector in both types
What is the difference between the PNP and NPN transistor symbols?
The direction of the arrow on the emitter lead
Which transistor amplifier configurations have their signal voltages in phase?
Common base and common collector
What half-wave rectifier component limits the peak current?
The full-wave rectifier is used in
low-voltage and high-voltage circuits
In an electronic voltage regulator, the series transistor acts like a
What do most logic circuits use to define the input or output condidtion?
To obtain a high output, the inputs to an AND gate must be
Which logic gate has a high output when all inputs are low?
What unit is used as a circuit-controlling device?
If you're troubleshooting a parallel circuit with one leg open, an ammeter connected in series with the whole circuit gives what kind of amperage reading?
What would the ohmmeter read for a shorted component in a seres-parallel circuit?
Lower than normal or zero
The voltmeter indicates voltage, but it actually measures
In measuring an unknown voltage with a voltmeter, what range should you use first?
highest meter range
If your ohmmeter won't adjust to zero when you're ready to use it, you should
change the battery
An ohmmeter indicated an open circuit when it reads
How do you connect an ammeter in a circuit?
The AN/USM-33 multimeter uses crystal diodes to change
AC voltage to DC current
Before taking the first current measurement, you shoul set the range select swith on the
0 to 600 range
The AN/PSM-33 multimeter indicator has how many range scales?
What should you do to change the AN/PSM-37 meter's range or functin switch without removing the test leads from the circuit?
Push in the push-to-open-and-reset control
To measure circuit current, you connect an AN/PSM-37 multimeter in
series in the circuit
Use the range button on the Fluke multimeter to
move the decimal point
On the Fluke multlimeter, what does it mean when the H symbol is shown on the meter display?
Touch-hold mode is in use
When measuring resistance with the Fluke multimeter, what does the letters OL on the display indicate?
The thermoswith tester can check switches with a farneheit range or
200 to 1000 degrees
When do you turn the anti skid tester Power switch on?
Just after you turn on the aircraft power
What is the maximum current output of the igniter circuit tester?
You should perform an preoperational check of the igniter circuit tester at least
prior to each day's use
What does each unit in the test stand incorporate for safety during maintenance?
Power disconnect switch
What must be done to apply a reactive load to a generator under test?
Load a power factor
If a circuit has two equal resistors connected in series, a voltmeter connected across an open resistor will read
You would troubleshoot a 28VDC circuit for a blown fuse (short) with a/an
In checking for a shorted relay in a parallel circuit, you must
isolate the component
Which of the following statements is true concerning ni-cad batteries and lead-acid batteries?
They must be stored and charged in seperate areas
The greatest hazard in working around a lead-acid battery is
The neutralizing agent for sulfuric acid is
bicarbonate of soda
Lead-acid batteries and Ni-cad batteries are stored and charged in seperate areas because accidentally mixing the electrolytes could
neutralize the electrolytes, causing excessive heat, and the battery might explode
How many cells does a 24V lead-acid battery have?
The number of cells in a normal Ni-cad battery for a 24V aircraft system is
A ni-cad battery's seperators are made of nylon and cellophane or
A fully charged battery should have a specific gravity reading of
1.275 to 1.300
What do you use to adjust a lead-acid battery's electrolyte level?
Constant-Current charging keeps the current at a value that is predetermined by the
In an equalized NI-Cad battery, each cell's voltage is
Pitting corrosion of aluminum or magnesium alloy first appears as
white powdery deposit on the metal surface
All metal components of your systems should get a comprehensive inspection for corrosion
during all inspections