MCQOPTIONS
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MCQOPTIONS
This section includes 1728 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1101. |
What is the significance of the J and K terminals on the J-K flip-flop? |
| A. | There is no known significance in their designations. |
| B. | The J represents "jump," which is how the Q output reacts whenever the clock goes HIGH and the J input is also HIGH. |
| C. | The letters represent the initials of Johnson and King, the co-inventors of the J-K flip-flop. |
| D. | All of the other letters of the alphabet are already in use. |
| Answer» B. The J represents "jump," which is how the Q output reacts whenever the clock goes HIGH and the J input is also HIGH. | |
| 1102. |
Which of the following describes the operation of a positive edge-triggered D-type flip-flop? |
| A. | If both inputs are HIGH, the output will toggle. |
| B. | The output will follow the input on the leading edge of the clock. |
| C. | When both inputs are LOW, an invalid state exists. |
| D. | The input is toggled into the flip-flop on the leading edge of the clock and is passed to the output on the trailing edge of the clock. |
| Answer» C. When both inputs are LOW, an invalid state exists. | |
| 1103. |
The control element in a basic shunt voltage regulator is a zener diode. |
| A. | True |
| B. | False |
| Answer» C. | |
| 1104. |
The output voltage of a summing amplifier is proportional to the product of the input voltages. |
| A. | True |
| B. | False |
| Answer» C. | |
| 1105. |
When used as a comparator, an op-amp is wired in a closed-loop configuration. |
| A. | True |
| B. | False |
| Answer» C. | |
| 1106. |
If the resistor drops 6 V and the capacitor drops 8 V in a series RC circuit, the source voltage equals 10 V. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1107. |
Which of the following is a type of error associated with digital-to-analog converters (DACs)? |
| A. | nonmonotonic error |
| B. | incorrect output codes |
| C. | offset error |
| D. | nonmonotonic and offset error |
| Answer» E. | |
| 1108. |
The results of internal IC failures will usually be noticed during the ______ phase of troubleshooting. |
| A. | diagnostic |
| B. | isolation |
| C. | repair |
| D. | final test |
| Answer» B. isolation | |
| 1109. |
Erratic or unexplained digital circuit activity is often due to _________. |
| A. | a glitch |
| B. | a random pulse |
| C. | clock frequency changes |
| D. | a change in slew rate |
| Answer» D. a change in slew rate | |
| 1110. |
The device that would best aid in open track detection is a(n) ________. |
| A. | multimeter |
| B. | current tracer |
| C. | logic probe |
| D. | oscilloscope |
| Answer» C. logic probe | |
| 1111. |
A check of all power supply voltages should be made during the ________ method of troubleshooting. |
| A. | half-split |
| B. | diagnosis |
| C. | repair |
| D. | final test |
| Answer» B. diagnosis | |
| 1112. |
A 4-bit R/2R digital-to-analog (DAC) converter has a reference of 5 volts. What is the analog output for the input code 0101. |
| A. | 0.3125 V |
| B. | 3.125 V |
| C. | 0.78125 V |
| D. | 3.125 V |
| Answer» C. 0.78125 V | |
| 1113. |
What is the resolution of a digital-to-analog converter (DAC)? |
| A. | It is the comparison between the actual output of the converter and its expected output. |
| B. | It is the deviation between the ideal straight-line output and the actual output of the converter. |
| C. | It is the smallest analog output change that can occur as a result of an increment in the digital input. |
| D. | It is its ability to resolve between forward and reverse steps when sequenced over its entire range. |
| Answer» D. It is its ability to resolve between forward and reverse steps when sequenced over its entire range. | |
| 1114. |
Which of the following is correct for a gated D-type flip-flop? |
| A. | The Q output is either SET or RESET as soon as the D input goes HIGH or LOW. |
| B. | The output complement follows the input when enabled. |
| C. | Only one of the inputs can be HIGH at a time. |
| D. | The output toggles if one of the inputs is held HIGH. |
| Answer» B. The output complement follows the input when enabled. | |
| 1115. |
When both inputs of a J-K flip-flop cycle, the output will: |
| A. | be invalid |
| B. | not change |
| C. | change |
| D. | toggle |
| Answer» C. change | |
| 1116. |
The 555 timer can be used in which of the following configurations? |
| A. | astable, monostable |
| B. | monostable, bistable |
| C. | astable, toggled |
| D. | bistable, tristable |
| Answer» B. monostable, bistable | |
| 1117. |
What are the two main applications for ac? |
| A. | direct, pulsating |
| B. | electric, magnetic |
| C. | power, information |
| D. | static, dynamic |
| Answer» D. static, dynamic | |
| 1118. |
A 12-volt battery is delivering 3 amperes to a resistor. The power dissipated by the resistor is 4 watts. |
| A. | True |
| B. | False |
| Answer» C. | |
| 1119. |
Resistance limits the flow of current. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1120. |
If 500 mA is flowing through a 10 resistor, the wattage rating of the resistor should be 2 watts. |
| A. | True |
| B. | False |
| Answer» C. | |
| 1121. |
A digital voltmeter can be used to measure resistance. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1122. |
Carbon composition resistors are the most common and the least expensive type of fixed-value resistor. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1123. |
"Train" and "single" is the mode selection for a _______. |
| A. | multimeter |
| B. | logic probe |
| C. | current tracer |
| D. | logic pulser |
| Answer» E. | |
| 1124. |
The use of a logic probe may be improved through the use of a(n) ________. |
| A. | logic clip |
| B. | frequency counter |
| C. | oscilloscope |
| D. | current tracer |
| Answer» B. frequency counter | |
| 1125. |
The control of digital circuits is usually achieved with _________. |
| A. | random pulses |
| B. | clock signals |
| C. | sophisticated gating |
| D. | selected frequencies |
| Answer» C. sophisticated gating | |
| 1126. |
In order for a logic probe to operate, its red and black leads must first be connected to a ________. |
| A. | logic clip |
| B. | HIGH or TRUE signal |
| C. | power source |
| D. | logic pulser |
| Answer» D. logic pulser | |
| 1127. |
The ideal test equipment to use for locating shorts in digital circuitry is the ________ and _______. |
| A. | logic probe, clip |
| B. | logic pulser, logic probe |
| C. | current tracer, logic pulser |
| D. | current tracer, logic clip |
| Answer» D. current tracer, logic clip | |
| 1128. |
The three basic steps for fixing a failure are ISOLATE, DIAGNOSE, and REPAIR. |
| A. | True |
| B. | False |
| Answer» C. | |
| 1129. |
An internal logic gate that shorts to either +VCC or ground will cause the inputs or output to be stuck either LOW or FLOATING. |
| A. | True |
| B. | False |
| Answer» C. | |
| 1130. |
A noise problem in a digital circuit is often called a glitch. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1131. |
The time interval between the start of two consecutive pulses is called pulse repetition time. |
| A. | True |
| B. | False |
| Answer» C. | |
| 1132. |
What is the waveform period of a square wave signal that horizontally covers 3 major divisions per cycle? (time/cm = 50 ms) |
| A. | 50 ms |
| B. | 100 ms |
| C. | 150 ms |
| D. | 200 ms |
| Answer» D. 200 ms | |
| 1133. |
A sine wave has: |
| A. | four quadrants |
| B. | two alternations |
| C. | one period |
| D. | all of the above |
| Answer» E. | |
| 1134. |
What is the peak-to peak voltage of a 56 Vrms ac voltage? |
| A. | 158 V |
| B. | 164 V |
| C. | 82 V |
| D. | 79 V |
| Answer» B. 164 V | |
| 1135. |
One oscilloscope selector knob that allows the major and minor divisions of the graticule to be used to determine a waveform period is called a: |
| A. | focus control |
| B. | time/cm control |
| C. | intensity control |
| D. | volts/cm control |
| Answer» C. intensity control | |
| 1136. |
What is the period of a 16 MHz sine wave? |
| A. | 196 ns |
| B. | 62.5 ns |
| C. | 31.25 ns |
| D. | 19.9 ns |
| Answer» C. 31.25 ns | |
| 1137. |
What is the name of a device that converts sound waves to electrical waves? |
| A. | an amplifier |
| B. | an antenna |
| C. | a filter |
| D. | a microphone |
| Answer» E. | |
| 1138. |
The power that is distributed from a power plant to your home is: |
| A. | high voltage to high voltage |
| B. | low voltage to high voltage |
| C. | high voltage to low voltage |
| D. | low voltage to low voltage |
| Answer» D. low voltage to low voltage | |
| 1139. |
A rectangular wave that has a duty cycle of 50 percent could be called a: |
| A. | c wave |
| B. | sawtooth wave |
| C. | square wave |
| D. | triangle wave |
| Answer» D. triangle wave | |
| 1140. |
A triangle wave consists of repeating: |
| A. | positive ramps only |
| B. | negative ramps only |
| C. | positive and negative ramps of equal value |
| D. | positive and negative ramps of unequal value |
| Answer» D. positive and negative ramps of unequal value | |
| 1141. |
What is the name of a device used to directly measure the frequency of a periodic wave? |
| A. | oscilloscope |
| B. | frequency meter or counter |
| C. | audio frequency generator |
| D. | radio frequency generator |
| Answer» C. audio frequency generator | |
| 1142. |
Which control should be moved to display more cycles of a signal on an oscilloscope? |
| A. | horizontal position to left or right |
| B. | volts/cm to a smaller number |
| C. | vertical position to top or bottom |
| D. | time/cm to a higher setting |
| Answer» E. | |
| 1143. |
AC effective voltage is named: |
| A. | average |
| B. | peak |
| C. | peak-to-peak |
| D. | root mean square |
| Answer» E. | |
| 1144. |
A virtual ground is a ground for current, but not for voltage. |
| A. | True |
| B. | False |
| Answer» C. | |
| 1145. |
If a voltmeter measures a sine wave as 500 mV, what would be its average value? |
| A. | 159.0 mV |
| B. | 318.5 mV |
| C. | 353.5 mV |
| D. | 451.0 mV |
| Answer» E. | |
| 1146. |
One adjustable knob on the oscilloscope that allows the trace to be aligned with a reference graticule is called the: |
| A. | position control |
| B. | focus control |
| C. | intensity control |
| D. | volts/cm control |
| Answer» B. focus control | |
| 1147. |
Signal comparisons may be most easily seen when using which item of test equipment? |
| A. | spectrum analyzer |
| B. | multimeter |
| C. | function generator |
| D. | dual trace oscilloscope |
| Answer» E. | |
| 1148. |
The magnitude that an alternation varies from zero is called its: |
| A. | altitude |
| B. | amplitude |
| C. | attitude |
| D. | polarity |
| Answer» C. attitude | |
| 1149. |
A PLL can be used as a(n) ___________. |
| A. | series voltage regulator |
| B. | frequency multiplier |
| C. | relaxation oscillator |
| D. | Schmitt trigger |
| Answer» C. relaxation oscillator | |
| 1150. |
This circuit is a differentiator. |
| A. | True |
| B. | False |
| Answer» B. False | |