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Combinational Logic Circuits
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Question
Which type of decoder will select one of sixteen outputs, depending on the 4-bit binary input value?
Options
A. hexadecimal
B. dual octal outputs
C. binary-to-hexadecimal
D. hexadecimal-to-binary
Correct Answer
hexadecimal
More questions
1. You could increase the time constant of an
RC
circuit by
Options
A. adding a resistor in parallel with the circuit resistance
B. adding a capacitor in parallel with the circuit capacitance
C. increasing the amplitude of the input voltage
D. exchanging the position of the resistor and capacitor in the circuit
Show Answer
Scratch Pad
Discuss
Correct Answer: adding a capacitor in parallel with the circuit capacitance
2. The register in the 8085 microprocessor that is used to keep track of the memory address of the next opcode to be run in the program is the ________.
Options
A. stack pointer
B. program counter
C. instruction pointer
D. accumulator
Show Answer
Scratch Pad
Discuss
Correct Answer: program counter
3. Isolation amps are named as such because they are sealed for protection from outside environmental damage.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: False
4. If the gain of a closed-loop inverting amplifier is 3.9, with an input resistor value of 1.6 kilohms, what value of feedback resistor is necessary?
Options
A. 6240 ohms
B. 2.4 kilohms
C. 410 ohms
D. 0.62 kilohms
Show Answer
Scratch Pad
Discuss
Correct Answer: 6240 ohms
5. An RL integrator can act as a __________ filter and an RC differentiator can act as a __________ filter.
Options
A. high-pass, high-pass
B. low-pass, low-pass
C. high-pass, low pass
D. low-pass, high-pass
Show Answer
Scratch Pad
Discuss
Correct Answer: low-pass, high-pass
6. A circuit that has an output equal to the algebraic sum of the inputs is called a(n) ______ .
Options
A. integrator amplifier
B. summing amplifier
C. differential amplifier
D. voltage multiplier
Show Answer
Scratch Pad
Discuss
Correct Answer: summing amplifier
7. The ___ of a circuit describes the ability of that circuit to respond to certain frequencies while rejecting all others.
Options
A. bandwidth
B. selectivity
C. sensitivity
D. quality factor
Show Answer
Scratch Pad
Discuss
Correct Answer: selectivity
8. Capacitor value markings are usually:
Options
A. alphanumeric
B. color dabs
C. standard
D. white print
Show Answer
Scratch Pad
Discuss
Correct Answer: alphanumeric
9. Test equipment selection enables the technician to both generate signals and:
Options
A. change circuit conditions
B. inject signals
C. sense circuit conditions
D. change signal frequencies
Show Answer
Scratch Pad
Discuss
Correct Answer: sense circuit conditions
10. The phase difference between sine waves of different frequencies is:
Options
A. equal to their frequency differences
B. the difference in their fixed time displacement
C. the same throughout time
D. constantly changing
Show Answer
Scratch Pad
Discuss
Correct Answer: the difference in their fixed time displacement
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