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.
| 1201. |
One horsepower is 746 watts. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1202. |
Fixed-value resistors can internally short-circuit. |
| A. | True |
| B. | False |
| Answer» C. | |
| 1203. |
A resistor with a value of 9.9 k 10% could have a value between 8.91 k and 10.89 k. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1204. |
A load resistance is the resistance of the load. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1205. |
Variable resistors have problems with the wiper making contact. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1206. |
The maximum potential a material can withstand without rupture is called breakdown voltage. |
| A. | True |
| B. | False |
| Answer» C. | |
| 1207. |
The cross-sectional area of a conductor is one factor that determines the conductor's resistance to current. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1208. |
In a resistive circuit, if the voltage increases, the current will increase. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1209. |
A 2% 55 k resistor would have a color coding of green, green, black, red, red. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1210. |
The resistive track of a rheostat or potentiometer can be classified as having either a linear or tapered resistance. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1211. |
Resistance is inversely proportional to current. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1212. |
A rheostat is not a type of variable resistor. |
| A. | True |
| B. | False |
| Answer» C. | |
| 1213. |
One of DeMorgan's theorems states that . Simply stated, this means that logically there is no difference between: |
| A. | a NAND gate and an AND gate with a bubbled output |
| B. | a NOR gate and an AND gate with a bubbled output |
| C. | a NOR gate and a NAND gate with a bubbled output |
| D. | a NAND gate and an OR gate with a bubbled output |
| Answer» C. a NOR gate and a NAND gate with a bubbled output | |
| 1214. |
Power companies supply ac, not dc, because: |
| A. | it is easier to transmit ac |
| B. | there is no longer a need for dc |
| C. | dc is more dangerous |
| D. | there are not enough batteries |
| Answer» B. there is no longer a need for dc | |
| 1215. |
Reverse bias is a condition that essentially ___________ current through the diode. |
| A. | allows |
| B. | prevents |
| C. | increases |
| D. | blocks |
| Answer» C. increases | |
| 1216. |
Atoms that normally have three electrons in their outer shell are called __________________ atoms. |
| A. | trivalent |
| B. | pentavalent |
| C. | tetravalent |
| D. | charged |
| Answer» B. pentavalent | |
| 1217. |
If a waveform period is determined to be 10 microseconds in duration, what is the frequency of the signal? |
| A. | 100 Hz |
| B. | 1000 Hz |
| C. | 10 kHz |
| D. | 100 kHz |
| Answer» E. | |
| 1218. |
The phase difference between sine waves of different frequencies is: |
| A. | equal to their frequency differences |
| B. | the difference in their fixed time displacement |
| C. | the same throughout time |
| D. | constantly changing |
| Answer» C. the same throughout time | |
| 1219. |
If a sine wave signal is 100 mV peak-to-peak, how many volts would be measured by a voltmeter? |
| A. | 14.14 mV |
| B. | 35.4 mV |
| C. | 63.7 mV |
| D. | 70.7 mV |
| Answer» C. 63.7 mV | |
| 1220. |
What term expresses the frequency of a rectangular wave? |
| A. | Hz |
| B. | period |
| C. | PRF |
| D. | PRT |
| Answer» D. PRT | |
| 1221. |
What is the peak value of a household appliance that uses a 230 V ac source? |
| A. | 163 V |
| B. | 230 V |
| C. | 325 V |
| D. | 480 V |
| Answer» D. 480 V | |
| 1222. |
What is the waveform period difference between the 60 Hz electricity used in this country and the 50 Hz used in Europe? |
| A. | 3 ms |
| B. | 16 ms |
| C. | 4 ms |
| D. | 20 ms |
| Answer» B. 16 ms | |
| 1223. |
A sine wave reaches maximum positive voltage at: |
| A. | 90 |
| B. | 0 |
| C. | 90 |
| D. | 360 |
| Answer» B. 0 | |
| 1224. |
Which percentages of full-amplitude rise time are used for a pulse wave? |
| A. | 0 to 50 percent |
| B. | 0 to 100 percent |
| C. | 5 to 95 percent |
| D. | 10 to 90 percent |
| Answer» E. | |
| 1225. |
What is the average value of a 12 V peak wave? |
| A. | 3.82 V |
| B. | 4.24 V |
| C. | 7.64 V |
| D. | 9.42 V |
| Answer» D. 9.42 V | |
| 1226. |
A test equipment item that has the ability to produce either square, triangular, or sawtooth waveforms is called: |
| A. | a function generator |
| B. | a radio frequency generator |
| C. | an audio frequency generator |
| D. | a frequency meter or counter |
| Answer» B. a radio frequency generator | |
| 1227. |
The current is flowing in what direction? |
| A. | clockwise |
| B. | counterclockwise |
| C. | in both directions at the same time |
| D. | 50% of the time clockwise and 50% of the time counterclockwise |
| Answer» E. | |
| 1228. |
If the frequency of a radio wave is increased, then its wavelength will: |
| A. | increase |
| B. | decrease |
| C. | remain the same |
| D. | cannot tell |
| Answer» C. remain the same | |
| 1229. |
What is the rms voltage value of an ac signal whose peak oscilloscope display uses 3 major divisions above the zero setting? (V/cm = 5) |
| A. | 5.3 V |
| B. | 10.6 V |
| C. | 15.0 V |
| D. | 21.2 V |
| Answer» C. 15.0 V | |
| 1230. |
What is the peak-to-peak current value when an ammeter measures a 20 mA value? |
| A. | 14 mA |
| B. | 28 mA |
| C. | 40 mA |
| D. | 57 mA |
| Answer» E. | |
| 1231. |
How long would it take to transmit an electromagnetic wave to a receiving antenna 1,000 miles away? |
| A. | 5.38 ms |
| B. | 10.8 ms |
| C. | 53.8 ms |
| D. | 108 ms |
| Answer» B. 10.8 ms | |
| 1232. |
The Boolean expression is logically equivalent to what single gate? |
| A. | NAND |
| B. | NOR |
| C. | AND |
| D. | OR |
| Answer» B. NOR | |
| 1233. |
The observation that a bubbled input OR gate is interchangeable with a bubbled output AND gate is referred to as: |
| A. | a Karnaugh map |
| B. | DeMorgan's second theorem |
| C. | the commutative law of addition |
| D. | the associative law of multiplication |
| Answer» C. the commutative law of addition | |
| 1234. |
The distance that a signal's energy can travel in the time it takes for one cycle to occur is called the signal's: |
| A. | amplitude |
| B. | frequency |
| C. | wavelength |
| D. | period |
| Answer» D. period | |
| 1235. |
A voltage-to-current converter is used in applications where it's necessary to have an output load current that is controlled by _________. |
| A. | input frequency |
| B. | output resistance |
| C. | input voltage |
| D. | input resistance |
| Answer» D. input resistance | |
| 1236. |
The gain of an OTA is the ratio of the output current to the input voltage, and is measured in _____________. |
| A. | amps |
| B. | volts |
| C. | siemens |
| D. | no units |
| Answer» D. no units | |
| 1237. |
An instrumentation amplifier has extremely high ________, good ________, and high ________. |
| A. | input impedance, common-mode rejection, gain |
| B. | noise factor, grounding, power |
| C. | working voltages, current capacity, output impedance |
| D. | output gain, output loading, power |
| Answer» B. noise factor, grounding, power | |
| 1238. |
The external resistor of a typical instrumentation amplifier is used to set the ________. |
| A. | impedance |
| B. | rejection ratio |
| C. | gain |
| D. | isolation |
| Answer» D. isolation | |
| 1239. |
If an operational transconductance amplifier (OTA) is used as an amplitude modulator, the voltage gain is varied by applying a _________ voltage to the ______ input. |
| A. | demodulation, bias |
| B. | modulation, bias |
| C. | bias, modulation |
| D. | low-frequency, bias |
| Answer» C. bias, modulation | |
| 1240. |
The ________ amplifier is ideal for amplitude modulation since its gain is current-controlled. |
| A. | log |
| B. | operational transconductance |
| C. | isolation |
| D. | Schmitt |
| Answer» C. isolation | |
| 1241. |
One oscilloscope selector knob that allows the major and minor divisions of the graticule to be used to determine a signal amplitude value is called the: |
| A. | time/cm control |
| B. | position control |
| C. | intensity control |
| D. | volts/cm control |
| Answer» E. | |
| 1242. |
If current varies periodically from zero to a maximum, back to zero, and then repeats, the signal is: |
| A. | direct |
| B. | alternating |
| C. | pulsating |
| D. | repetitive |
| Answer» D. repetitive | |
| 1243. |
What voltage will an ac voltmeter display? |
| A. | rms |
| B. | average |
| C. | peak |
| D. | peak-to-peak |
| Answer» B. average | |
| 1244. |
How do fixed resistors usually fail? |
| A. | slowly over time |
| B. | by increasing their value |
| C. | by becoming an open circuit |
| D. | by increasing their value and becoming an open circuit |
| Answer» D. by increasing their value and becoming an open circuit | |
| 1245. |
To get a negative gate-source voltage in a self-biased JFET circuit, you must use a ________. |
| A. | negative gate supply voltage |
| B. | ground |
| C. | voltage divider |
| D. | source resistor |
| Answer» E. | |
| 1246. |
A data conversion system may be used to interface a digital computer system to _________. |
| A. | an analog output device |
| B. | a digital output device |
| C. | an analog input device |
| D. | a digital printer |
| Answer» B. a digital output device | |
| 1247. |
Sensor outputs destined for a digital computer system must first be processed by __________. |
| A. | a DAC |
| B. | an ADC |
| C. | the MPU |
| D. | a PLD |
| Answer» C. the MPU | |
| 1248. |
Digitizing a signal converts it from digital to analog. |
| A. | True |
| B. | False |
| Answer» C. | |
| 1249. |
A logic circuit whose output is LOW when at least one input is HIGH is a(n) _________ gate. |
| A. | NOR |
| B. | AND |
| C. | NAND |
| D. | exclusive-OR gate |
| Answer» B. AND | |
| 1250. |
The AND function can be used to ___________ and the OR function can be used to _____________. |
| A. | enable, disable |
| B. | disable, enable |
| C. | synchronize, energize |
| D. | detect, invert |
| Answer» B. disable, enable | |