AET NCATT Questions with CORRECT Answers

AET NCATT Questions with CORRECT Answers

Question:
The "negative temperature coefficient" of a thermistor means that as temperature
increases, resistance will do what?
A) increase B) decrease C) Remain the same
Answer:
B) decrease


Question:
Using the swamping resistor for thermal stability, what type of feedback is developed to
control the amplifier?
A) Regenerative B) Degenerative
C) Positive feedback
Answer:
B) Degenerative


Question:
Which of the following devices is used to dissipate heat into the air?
A) Heat sink B) Circuit board
C) Swamping resistor D) Coupling Capacitor
Answer:
A) Heat sink


Question:
What type of amplifier coupling is used that can amplify DC voltages as well as AC
signals?
A) LC B) RC
C) Direct D) Transformer
Answer:
C) Direct

,Question:
In a common collector amplifier, degenerative feedback is how many degrees out of
phase with the input signal?
A) 0 degrees B) 90 degrees
C) 180 degrees D) 270 degrees
Answer:
C) 180 degrees


Question:
C) Less than one, greater than one D) Greater than one, greater than one
Answer:
38) B (*C is correct for a "Common Collector", D is correct for a "Common Emitter")


Question:
What type of waveform is produced by a sinusoidal oscillator?
A) Saw tooth B) Sine wave
C) Square wave D) Rectangular
Answer:
B) Sine wave


Question:
C) negative feedback D) Constructive feedback
Answer:
A) regenerative feedback


Question:
C) 50 kHz D) 100 kHz
Answer:
45) A *PRT includes negative alternation = 200 μsec tota


Question:
What type of output waveform is produced by an astable multivibrator?
A) Sine wave B) Saw tooth
C) Square wave or rectangular D) Rectangular wave
Answer:
C) Square wave or rectangular

,Question:
C) Time base generator D) Free running oscillator
Answer:
D) Free running oscillator


Question:
C) Cutoff time of Q1 and Q2 D) discharge time of C1 and C2
Answer:
A) Input trigger frequency


Question:
(or)
A) 90o B) 360o C) 180o D) More than 180o but less than 360o
Answer:
C) 180o


Question:
The interchange of energy between the inductor and capacitor in a tank circuit is called
what?
A) Damping B) degeneration
C) Loading effect D) the flywheel effect
Answer:
D) the flywheel effect


Question:
The amplifier's class of operation is determined by what?
A) Fidelity B) efficiency
C) output waveform D) amount of forward bias
Answer:
D) amount of forward bias


Question:
What is the resistance of normally closed contacts when the relay is de-energized?
A) 0Ω / short B) Infinite Ω C) 50Ω
Answer:
A) 0Ω / short

, Question:
What distinguishes a solenoid from a basic relay?
A) A coil to create a magnetic field. B) The plunger (armature) pulled into the coil.
C) Has multiple Normally Open (NO) or Normally Closed (NC) contacts.
Answer:
B) The plunger (armature)
pulled into the coil.


Question:
What part of a basic relay returns the armature to its de-energized position?
A) The coil B) The core C) The spring D) The contacts
Answer:
C) The spring


Question:
How many paths of current are required for a holding relay coil?
A) One B) Two C) Three D) Four
Answer:
B) Two


Question:
What parts of a relay comprise the Primary (Control) Circuit?
A) Armature, Contacts, Spring B) Core & Coil C) Moveable plunger, Coil, armature
Answer:
B) Core & Coil


Question:
A) Armature, Contacts, Spring B) Core & Coil C) Moveable plunger, Coil, armature
Answer:
A) Armature,
Contacts, Spring


Question:
Aircraft wire is normally rated at what voltage? A) 28Vdc B) 115Vac C) 26Vac
Answer:
B) 115Vac