MCQOPTIONS
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MCQOPTIONS
This section includes 9294 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 4201. |
To find the current in a 20 Ω resistance connected in a circuit, Norton's theorem is used. IN = 7.5 A. The current though 20 Ω resistance. |
| A. | is 7.5 A |
| B. | is less than 7.5 A |
| C. | may be 7.5 A or less |
| D. | may be 7.5 A or more or less |
| Answer» C. may be 7.5 A or less | |
| 4202. |
While calculating Norton's resistance, all current sources are short circuited. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4203. |
One commercial unit of energy is equal to |
| A. | 1 watt-sec |
| B. | 1 kilowatt-sec |
| C. | 1 kilowatt-hour |
| D. | One watt-hour |
| Answer» D. One watt-hour | |
| 4204. |
Two coupled coils with self inductances of 4 mH and 16 mH are connected in series. The maximum possible value of inductance can be |
| A. | 36 mH |
| B. | 20 mH |
| C. | 28 mH |
| D. | 64 mH |
| Answer» B. 20 mH | |
| 4205. |
In using KCL it is necessary that current leaving a node is written as negative. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4206. |
A resistor is rated at 0.75 watt, 1 kΩ. Its current rating is |
| A. | 1 mA |
| B. | 27.386 mA |
| C. | 1.268 mA |
| D. | 5.393 mA |
| Answer» C. 1.268 mA | |
| 4207. |
In the network of figure, the voltage drops across R1, R2, R3 are 6 V, 8 V and 12 V with polarities as shown. The value of R3 is |
| A. | 12 Ω |
| B. | 8 Ω |
| C. | 5 Ω |
| D. | 3 Ω |
| Answer» E. | |
| 4208. |
Assertion (A): Millman's theorem helps in replacing a number of current sources in parallel by a single current source.Reason (R): Maximum power transfer theorem is applicable only for dc, circuits. |
| A. | Both A and R are true and R is correct explanation of A |
| B. | Both A and R are true and R is not the correct explanation of A |
| C. | A is true but R is false |
| D. | A is false but R is true |
| Answer» D. A is false but R is true | |
| 4209. |
Double integration of unit step function leads to |
| A. | an impulse |
| B. | a parabola |
| C. | a ramp |
| D. | a doublet |
| Answer» C. a ramp | |
| 4210. |
A conductor has a cylindrical shape with a diameter d. Its resistance is 2 Ω. It is recast into a cylindrical conductor of diameter 0.3d. The resistance of new conductor is likely to be |
| A. | less than 2 Ω |
| B. | less than 0.6 Ω |
| C. | between 2 and 100 Ω |
| D. | more than 100 Ω |
| Answer» E. | |
| 4211. |
A thermal power plant has an efficiency of 0.4. If 0.6 kg of coal is burnt to generate 1 kWh, the calorific value of coal is |
| A. | about 3500 kcal/kg |
| B. | about 2500 kcal/kg |
| C. | about 1500 kcal/kg |
| D. | about 7500 kcal/kg |
| Answer» B. about 2500 kcal/kg | |
| 4212. |
An RC series circuit has R = 20 Ω and XC = 20 Ω. Then Z = |
| A. | 40 Ω |
| B. | 28.28 Ω |
| C. | 20 Ω |
| D. | 1 Ω |
| Answer» C. 20 Ω | |
| 4213. |
A digital clock uses __________ chip |
| A. | SSI |
| B. | LSI |
| C. | VLSI |
| D. | MSI |
| Answer» C. VLSI | |
| 4214. |
The contents of stack location 2109 H after the call operation will be |
| A. | 00001111 |
| B. | 01010101 |
| C. | 00100000 |
| D. | 00100010 |
| Answer» D. 00100010 | |
| 4215. |
In a flip-flop with RS latch a high S and a low R set the output to __________ and a low S and a high R set the output __________ . |
| A. | low, low |
| B. | high, high |
| C. | low, high |
| D. | high, low |
| Answer» D. high, low | |
| 4216. |
TTL XOR gate is very suitable as LCO driver. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4217. |
For the logic circuit shown in figure, the simplified Boolean expression for the output Y is |
| A. | A + B + C |
| B. | AB |
| C. | B |
| D. | C |
| Answer» C. B | |
| 4218. |
A typical microcomputer has 65, 536 registers in its memory. It will be specified as |
| A. | 65.536 memory |
| B. | 65.536 K memory |
| C. | 64 K memory |
| D. | 8 K memory |
| Answer» D. 8 K memory | |
| 4219. |
A function table is required in very large numbers the memory most switched for this purpose would be |
| A. | ROM |
| B. | PROM |
| C. | EPROM |
| D. | EAROM |
| Answer» B. PROM | |
| 4220. |
How many zone bits are there?The 8156 of a figure has RAM locations from 2000 H to 20 FFH. |
| A. | 2 |
| B. | 4 |
| C. | 8 |
| D. | 16 |
| Answer» D. 16 | |
| 4221. |
Which of the following is equivalent to AND-OR realization? |
| A. | NAND-NOR |
| B. | NOR-NOR |
| C. | NOR-NAND |
| D. | NAND-NAND |
| Answer» E. | |
| 4222. |
What kind of signal does the times produce? |
| A. | Single pulse |
| B. | Square wave |
| C. | Continuous pulse |
| D. | No signal |
| Answer» B. Square wave | |
| 4223. |
How many different BCD number can be stored in a register containing 12 switches using an 8, 4, 2, 1 code? |
| A. | 99 |
| B. | 100 |
| C. | 999 |
| D. | 1000 |
| Answer» E. | |
| 4224. |
An SR flip flop can be built using |
| A. | NOR gate only |
| B. | NAND gate only |
| C. | either NOR or NAND gates |
| D. | neither NOR nor NAND gates |
| Answer» D. neither NOR nor NAND gates | |
| 4225. |
For the shaded area in Venn diagram of the given figure, the Boolean expression is |
| A. | AB + BC + CA |
| B. | ABC + A B C |
| C. | ABC + A B C |
| D. | ABC+AB |
| Answer» B. ABC + A B C | |
| 4226. |
If an inverter is placed at the input to an SR flip-flop, the result is |
| A. | T flip-flop |
| B. | D flip-flop |
| C. | JK flip-flop |
| D. | BCD decade counter |
| Answer» C. JK flip-flop | |
| 4227. |
Multiplexer can be used as logic function generator. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4228. |
74HCT00 series is |
| A. | NAND IC |
| B. | interface between TTL and CMOS |
| C. | inverting IC |
| D. | NOR IC |
| Answer» C. inverting IC | |
| 4229. |
The output of a full adder is |
| A. | SUM |
| B. | CARRY |
| C. | SUM and CARRY |
| D. | none of the above |
| Answer» C. SUM and CARRY | |
| 4230. |
Number of cards read per minute by a card reader may be of the order of |
| A. | 20 |
| B. | 1 |
| C. | 10000 |
| D. | 300 |
| Answer» E. | |
| 4231. |
The Truth Table shown is for a |
| A. | CMO |
| B. | counter |
| C. | flip-flop |
| D. | half adder |
| Answer» E. | |
| 4232. |
The code which provides for parity check is |
| A. | Baudot |
| B. | ASCII |
| C. | EBCDIC |
| D. | Excess-3 |
| Answer» C. EBCDIC | |
| 4233. |
The advantages of flash memory over EEPROM are |
| A. | higher density |
| B. | lower cost |
| C. | both higher density and lower cost |
| D. | none of the above |
| Answer» D. none of the above | |
| 4234. |
In a JK flip flop output Qn = 1 and it does not change when clock pulse is applied. The possible combination of Jn and Kn is (X denotes don't care) |
| A. | X and 0 |
| B. | X and 1 |
| C. | 0 and X |
| D. | 1 and X |
| Answer» B. X and 1 | |
| 4235. |
The minimum decimal equivalent of the number 11C0 is |
| A. | 183 |
| B. | 194 |
| C. | 268 |
| D. | 269 |
| Answer» D. 269 | |
| 4236. |
VF glows with __________ colour when activated. |
| A. | Red |
| B. | Orange |
| C. | Bluish green |
| D. | none of these |
| Answer» D. none of these | |
| 4237. |
Equation xl0 = 110010012 when solved for x gives the value of x as |
| A. | 8 |
| B. | 111 |
| C. | 152 |
| D. | 201 |
| Answer» E. | |
| 4238. |
The sum S of A and B in a Half Adder can be implemented by using K NAND gates. The value of K is |
| A. | 3 |
| B. | 4 |
| C. | 5 |
| D. | none of these |
| Answer» C. 5 | |
| 4239. |
When a bit is 0 is a DDR, it makes the corresponding port pin an __________ On the other hand, a 1 bit programs a __________ Pin. |
| A. | output, input |
| B. | output, output |
| C. | input, input |
| D. | input, output |
| Answer» E. | |
| 4240. |
Nibble is |
| A. | a string of 4 bits |
| B. | a string of 8 bits |
| C. | a string of 16 bit |
| D. | a string of 64 bits |
| Answer» B. a string of 8 bits | |
| 4241. |
Which of the following input is not possible in case of a SR flip-flop? |
| A. | S = 0, R = 0 |
| B. | S = 0, R = 1 |
| C. | S = 1, R = 0 |
| D. | S = 1, R = 1 |
| Answer» E. | |
| 4242. |
The number of flags available in 6800 are |
| A. | 6 |
| B. | 5 |
| C. | 7 |
| D. | 4 |
| Answer» B. 5 | |
| 4243. |
Microprocessors were introduced in the year |
| A. | 1951 |
| B. | 1961 |
| C. | 1971 |
| D. | 1981 |
| Answer» D. 1981 | |
| 4244. |
What is the addressing mode used in instruction MOV M, C? |
| A. | Direct |
| B. | Indirect |
| C. | Induced |
| D. | Immediate |
| Answer» C. Induced | |
| 4245. |
Shift left and shift right operations occur in a calculator. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4246. |
Assertion (A): In hybrid digital circuits the problem of logic race can occur.Reason (R): In two level logic there is no problem of logic race. |
| A. | Both A and R are correct and R is correct explanation of A |
| B. | Both A and R are correct but R is not correct explanation of A |
| C. | A is true, R is false |
| D. | A is false, R is true |
| Answer» C. A is true, R is false | |
| 4247. |
What is the memory word size of 8085 p? |
| A. | 6 bits |
| B. | 8 bits |
| C. | 12 bits |
| D. | 16 bits |
| Answer» C. 12 bits | |
| 4248. |
Binary number 101101 when converted to its 2's complement will become |
| A. | 0101.01 |
| B. | 0100.10 |
| C. | 0100.10 |
| D. | 0101.10 |
| Answer» C. 0100.10 | |
| 4249. |
Assertion (A): In a BCD to 7 segment decoder the number of outputs active at one time is always the same.Reason (R): A decoder can be used to interface BCD input to LED display. |
| A. | Both A and R are correct and R is correct explanation of A |
| B. | Both A and R are correct but R is not correct explanation of A |
| C. | A is true, R is false |
| D. | A is false, R is true |
| Answer» E. | |
| 4250. |
The term VLSI generally refers to a digital IC having |
| A. | more than 1000 gates |
| B. | more than 100 gates |
| C. | more than 1000 but less than 9999 gates |
| D. | more than 100 but less than 999 gates |
| Answer» D. more than 100 but less than 999 gates | |