-
Screwdrivers are sized by the length of the?
Shank
-
A properly ground tip on a standard screwdriver?
Is square and flat
-
One of the most important things to remember when using a hammer or any other hand tool is to use a?
Tool only for its correct purpose
-
What kind of pliers are mainly for holding or bending flat or round stock?
Combination slip-joint.
-
One advantage of box-end wrenches is that they?
Are not likely to slip off a nut
-
Thickness gauges of various sizes are normally used to measure the?
Clearance between two objects
-
Before storing a torque wrench you have used, you should?
Set it at its lowest setting
-
Tubing used in aircraft oxygen, fuel, lubrication, fire extinguishing, instruments, hydraulic, and vent lines is?
Aluminum alloy and stainless steel
-
You can identify a fitting that has pipe threads by its?
Taper
-
When torquing a bolt assembly, what is the force applied to overcome friction?
Torsion
-
When installing a cotter pin, ensure the prong that bends over the bolt shank does not exceed the bolt nut?
Diameter
-
A good rule to follow in using safety wire is?
Loop it so that it opposes the loosening of the part
-
Wire insulation may consist of several layers of nonconducting material that provides?
Thermal protection and fluid resistance
-
Which technical order (TO) provides instructions for the Brady Wire Marking System?
1-1A-14
-
Wires and wire bundles should be supported by clamps or grommets at intervals of no more than?
24 inches
-
All wire groups or bundles must be tied when supports are more than?
12 inches apart.
-
Avoid using self-clinching tie straps where temperatures exceed?
185 F
-
How many nicked or broken wire strands are allowed on 16-gauge aluminum wire?
None.
-
The indent-type crimping tool should be used only on?
non-insulated terminals.
-
What do you use as junction points for circuits that are frequently disconnected?
Connector plugs.
-
What ensures a connector plug and receptacle are not mismated?
Key-and-key way arrangement.
-
When heat is applied to thermofit material, which is used in compact wire bundles, it will shrink by at least?
one-half its original diameter.
-
The electrical magnetic pulse (EMP)-hardened cable provides a barrier to?
electrostatic interference.
-
After a bonding or grounding jumper is installed, it should read no more than?
0.1 ohms.
-
Which type of solder is preferred for printed circuit boards?
63/37
-
Oxide film is removed from the surface of metals during the soldering process by the use of?
the soldering flux
-
In order to shape a soldering iron’s copper tip, use a?
fine file while the tip is cold.
-
In order to clean a plated soldering tip, use?
an abrasive cloth while the tip is cold
-
Prior to soldering electronic equipment, ensure the equipment is?
disconnected from the power source
-
How should you test the heat of a soldering iron?
Touch the tip to the solder, away from your body.
-
The minimum insulation clearance is how many times the wire diameter?
One.
-
An acceptable tinned wire has?
an insulation clearance equal to the diameter of the wire and wire strands covered with solder, but still visible.
-
After soldering, remove traces of flux with a?
medium-stiff brush and approved solvent
-
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?
180 F
-
Prior to soldering a turret terminal what must you do?
Wrap the wire around the terminal at least 180°, but no more than 270°.
-
After soldering a connection, what is your next step?
Clean the connection and inspect it for defects.
-
You prepped the wire and are ready to solder a cup terminal. What is your next step?
Melt a small amount of solder inside the terminal
-
How many British thermal units (BTU) does it take to raise the temperature of 5 pounds of water 5 Fahrenheit (F)?
25.
-
What happens when gas is trapped in a cylinder and pressure is applied to the piston, while the temperature remains constant?
Volume will decrease.
-
When a gas is heated, its pressure will?
increase
-
A permanent magnet
keeps its magnetism
-
The greater the current flow through an electromagnet, the?
greater the field strength.
-
The intensity of electrical current flow is measured in?
amperes
-
What is the symbol for Ohms?
omega symbol
-
The basic function of electricity is to?
transfer energy
-
According to Kirchhoff’s voltage law, in a closed circuit, the applied voltage is equal to the
sum of the voltage drops around the circuit.
-
Applied voltage in a parallel circuit is 12 volts, and there are two parallel branches with one 6-ohm resistor in each branch. The voltage drop across each resistor is?
12 volts.
-
The total resistance in a parallel circuit is always
less than the smallest resistance in the circuit
-
To find the total resistance in a series-parallel circuit, you must
add the total resistance of the parallel part to the total resistance of the series part.
-
The rule that indicates the direction a current-carrying conductor will move in a magnetic field is the
right-hand rule for motors
-
The effective electromotive force (EMF) in a motor is made up of
applied voltage minus CEMF
-
A positive peak is reached at what position?
90 F
-
The phase angle of an alternating current (AC) sine wave is measured in
degrees.
-
Alternating current (AC) generators operate on the principle of
induction
-
To compute capacitance, you must know the
plate area, distance between the plates, and type of dielectric
-
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
-
What process transfers electrical energy from the primary to the secondary winding of a transformer?
Mutual induction
-
The current in a two-phase induction motor is
90 F out-of-phase
-
The difference between the speed of the stator’s rotating magnetic field and the rotor is called
slip.
-
What controls the flow of the current carriers in a transistor?
Base.
-
Which is a true statement concerning normal operation of transistors?
Collector-base junctions are reversed biased.
-
What half-wave rectifier component limits the peak current?
Surge resistor.
-
The full-wave rectifier is used in
low-voltage and high-voltage circuits
-
When an electronic voltage regulator’s input voltage first increases,
series transistor bias decreases.
-
What do most logic circuits use to define the input or output condition?
Voltage polarity
-
To obtain a high output, the inputs to an AND gate must be
high.
-
Which logic gate has a high output when all inputs are low?
NOR
-
Which unit is used as a circuit-controlling device?
Switch
-
If you’re troubleshooting a parallel circuit with one leg or branch open, what kind of amperage reading does an ammeter connected in series with the whole circuit display?
Low.
-
What reading would the ohmmeter display for a shorted component in a series-parallel circuit?
Lower than normal or zero.
-
The voltmeter indicates voltage, but it actually measures
electron potential
-
Load lights can be effective for locating problems with
high resistance
-
The typical multimeter is a combination voltmeter
ohmmeter, and ammeter.
-
When measuring resistance with the Fluke multimeter, what do the letters OL on the display indicate?
Infinity.
-
What are the four range settings on the Fluke multimeter?
6, 60, 600, 1000
-
In using a voltmeter to check a circuit for an “open” in a direct current (DC) circuit, you must
observe polarities in the circuit
-
If a circuit has two equal resistors connected in series, a voltmeter connected across an open resistor will read
the difference in potential.
-
You would troubleshoot a 28-volts direct current (VDC) circuit for a blown fuse (short) with
an ohmmeter.
-
How do you check for a shorted relay in a parallel circuit?
Isolate the component.
-
What is the minimum personal protective equipment (PPE) you are required to wear when performing routine sealed lead-acid batteries (SLAB) maintenance?
Face shield and rubber gloves
-
The neutralizing agent for sulfuric acid is
bicarbonate of soda.
-
If nickel-cadmium (Ni-Cad) electrolyte is spilled, what kind of solution will help neutralize the electrolyte?
Boric acid.
-
How many cells does a 24-volt, lead-acid battery have?
12.
-
If a battery discharged at 2 amperes for 12 hours, it would furnish how many ampere-hours?
24.
-
If the vent plug on a nickel-cadmium (Ni-Cad) battery cell opens to relieve pressure, then the pounds per square inch (psi) is between
2–10 psi
-
If checking the electrolyte level in a nickel-cadmium (Ni-Cad) battery, then you would use which of the following?
Glass tube.
-
If you need to adjust a nickel-cadmium (Ni-Cad) battery’s electrolyte level, then which of the following would you use?
Polythylene wash bottle.
-
What technical order (TO) covers the RF80-K Charger/Analyzer?
35C3–2–112–1
-
After a sealed lead acid battery comes into the shop, what Air Force technical order (AFTO) or Department of Defense (DD) form is used to record servicing?
AFTO Form 161.
-
If a sealed lead acid battery is found to be leaking during maintenance, then the first thing to be done is
terminate the maintenance
-
Above what minimum volts direct current (VDC) is the sealed lead-acid battery (SLAB) designed to vent pressure?
31.5 VDC.
-
After the first hour a nickel-cadmium (Ni-Cad) battery is under test, how often should you monitor the individual cells?
15-minute intervals.
-
Which method is used to charge nickel-cadmium (Ni-Cad) batteries?
Reflex charge or constant current
-
Pitting corrosion of aluminum or magnesium alloy first appears as
white powdery deposit on the metal surface
-
Which corrosion type lifts up the metal surfaces?
Exfoliation.
-
All metal components of your systems should get a comprehensive inspection for corrosion
during all inspections.
-
All of these areas are prone to corrosion, except
flat, coated surfaces.
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