Pre-test For Avionics Specialists Quiz
Avionics encompasses components the pilot uses directly such as navigation, weather radar and radio communications. Are you interested in engineering and more specially aviation technologies? Well this is your quiz because if you want to specialize in aircraft mechanics and do preventative routine check on aeroplane you got to do this. Try it.
- 1.Which of the following instrument discrepancies would require replacement of the instrument 1. Red line missing. 2. Case leaking. 3. Glass cracked. 4. Mounting screws loose. 5. Case paint chipped. 6. Leaking at line B nut. 7. Will not zero out. 8. Fogged.
- A.
1, 3, 5, 8
- B.
2, 3, 7, 8
- C.
1, 4, 6, 7
- 2.An aircraft instrument panel is electrically bonded to the aircraft structure to
- A.
Act as a restraint strap
- B.
Aid in the panel installation
- C.
Provide current return paths
- 3.Where electric cables must pass through holes in bulkheads, formers, ribs, firewalls, etc., the wires should be protected from chafing by
- A.
Wrapping with plastic
- B.
Wrapping with electrical tape
- C.
Using a suitable grommet
- 4.AN/MS electrical connectors are specifically designed to meet
- A.
International Civil Aviation Organization (ICAO) standards
- B.
Military specifications
- C.
Technical Standard Order (TSO) specifications
- 5.If the (+) terminal of a voltmeter is connected to the (-) terminal of the source voltage and the (-) terminal of the meter is connected to the (+) terminal of the source voltage, the voltmeter will read
- A.
Backwards
- B.
Correctly
- C.
Low voltage
- 6.The three kinds of circuit-protection devices used most commonly in aircraft circuits are
- A.
Circuit breakers, fuses, and current limiters
- B.
Circuit breakers, capacitors, and current limiter plug-ins mechanical reset types
- C.
Circuit breakers, resistors, and current limiters
- 7.If a static pressure system check reveals excessive leakage, the leak(s) may be located by
- A.
Pressurizing the system and adding leak detection dye
- B.
Removing and visually inspecting the line segments
- C.
Isolating portions of the line and testing each portion systematically, starting at the instrument connections
- 8.Electric wire terminals for most aircraft applications must be what type
- A.
Ring
- B.
Slotted
- C.
Hook
- 9.What type of instrument is used for measuring very high values of resistance
- A.
Multimeter
- B.
Shunt type ohmmeter
- C.
Megohmmeter
- 10.Which instruments are connected to an aircraft's pitot static system 1. Vertical speed indicator. 2. Cabin altimeter. 3. Altimeter. 4. Cabin rate-of-change indicator. 5. Airspeed indicator.
- A.
1, 2, and 4
- B.
1, 3, and 5
- C.
1, 2, 3, 4, and 5
- 11.The most common method of attaching a pin or socket to an individual wire in an MS electrical connector is by
- A.
Crimping
- B.
Crimping and soldering
- C.
Soldering
- 12.What is the voltage drop for a No. 18 copper wire 50 feet long to carry 12.5 amperes, continuous operation Use the formula VD = RLA VD = Voltage drop R = Resistance per ft = .00644 L = Length of wire (feet) A = Amperes
- A.
4V
- B.
1/2V
- C.
1V
- 13.What is the square root of 16 raised to the fourth power
- A.
1,024
- B.
256
- C.
4,096
- 14.Which term means .001 ampere
- A.
Milliampere
- B.
Kiloampere
- C.
Microampere
- 15.The term that describes the combined resistive forces in an ac circuit is
- A.
Reactance
- B.
Resistance
- C.
Impedance
- 16.Diodes are used in electrical power supply circuits primarily as
- A.
Relays
- B.
Switches
- C.
Rectifiers
- 17.Circuits that must be operated only in an emergency or whose in advertent activation could
- A.
Spring loaded to off toggle or rocker switches
- B.
Guarded switches
- C.
Push-pull type circuit breakers only (no switches)
- 18.What does a rectifier do
- A.
Changes direct current into alternating current
- B.
Changes alternating current to direct current
- C.
Reduces voltage
- 19.The nominal rating of electrical switches refers to continuous
- A.
Current rating with the contacts open
- B.
Voltage rating with the contacts Closed
- C.
Current rating with the contacts closed
- 20.Capacitors are sometimes used in DC circuits to
- A.
Counteract inductive reactance at specific locations
- B.
Smooth out slight pulsations in current/voltage
- C.
Assist in stepping voltage and current up/or down
- 21.What is the advantage of current limiter
- A.
It breaks circuit quickly
- B.
It can be reset easily
- C.
It will take overload for a short period
- 22.The pin secon of an AN/MS connector is normally installed on
- A.
The power supply side of a circuit
- B.
The ground side of a current
- C.
Either side of a circuit (makes no difference)
- 23.Which of the following aircraft circuits does NOT contain fuse/circuit breaker
- A.
Starter circuit
- B.
Generator circuit
- C.
Air conditioning circuit
- 24.The output of an INS can be fed to
- A.
Attitude indicators
- B.
Altimeters
- C.
Vertical speed indicators
- 25.Earthrate is approximately
- A.
15 degrees per hour
- B.
5 degrees per hour
- C.
Rate gyro