Exam (elaborations)
ATT TEST 8
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Name: Score:98 Multiple choice questions
Term 1 of 98
What are three circuits in an op amp?
Ac circuit, dc circuit, mixed signal circuit
Series circuit, parallel circuit, combination circuit
Feedback circuit, oscillator circuit, filter circuit
Differential amp, common collector amp, push pull amp
Definition 2 of 98
When DC input decreases or load current increases
In parallel voltage regulator, V out decreases when what happens?
In a series voltage regulator, V out INCREASES when what happens?
What are the most common faults in voltage regulators?
Which component changes resistances to maintain constant V out (zener diode regulator)?
Term 3 of 98
Which faults cause output voltage to be 0V in voltage regulator?
D1 open, r1 short, q1 short collector-emitter
R1 open, open Q1 base-emitter
D1 short/r1 open, open between base-emitter
D1 short, q2 short
,Term 4 of 98
What replaces armature in multipole relays?
Coned or cratered contacts
Regulator and protection
Differential amp, common collector amp, push pull amp
Clapper and push rod
Term 5 of 98
Which faults cause output voltage to decrease in voltage regulator?
D1 and q2
R1 open, open q1 base-emitter
D1 open, r1 short, q1 short collector-emitter
D1 short, Q2 short
Term 6 of 98
When reverse biased higher than Vz, what is the output voltage of shunt regulator?
Vz
Output is applied voltage
Half-wave
Full-wave and bridge
,Term 7 of 98
Which two rectifiers require two input signals 180 degrees out of phase?
Input, rectifier, filter, regulator, protection
Clapper and push rod
Inverting
Full-wave and bridge
Term 8 of 98
What are most common faults in electrical circuits?
Open/short
Tx/rx Reverse
D1 Short, Q2 Short
Attenuation
Term 9 of 98
What is a purpose of relays?
Utilized for measuring temperature in a room
Used for applying power to circuits or controlling signal flow
Designed for data storage in computers
Intended for transmitting radio signals wirelessly
, Term 10 of 98
If load current increases in voltage regulator, what needs to be done to maintain constant
output?
Faulted magnetic coil or faulted contacts
Decrease resistance to drop less volts
Q1 collector-emitter resistance must increase
Q1 collector-emitter resistance must decrease
Term 11 of 98
Which faults cause output voltage to approach applied volts in voltage regulator?
R1 open, open q1 base-emitter
D1 open, R1 short, Q1 short Collector-Emitter
D1 open, short between collector-emitter
D1 short/r1 open, open between base-emitter
Term 12 of 98
What does a regulator do in a power supply?
maintains the output voltage at a constant level despite changes in load current
controls the temperature of the power supply components
monitors the amount of power consumed by the load
regulates the frequency of the input power
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