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.
| 1651. |
In the given circuit, Maximum power is being transferred to the load. |
| A. | True |
| B. | False |
| Answer» C. | |
| 1652. |
If the current drawn in the secondary of a transformer increases, the power in the primary should remain the same. |
| A. | True |
| B. | False |
| Answer» C. | |
| 1653. |
3428 is the decimal value for which of the following binary coded decimal (BCD) groupings? |
| A. | 11010001001000 |
| B. | 11010000101000 |
| C. | 011010010000010 |
| D. | 110100001101010 |
| Answer» C. 011010010000010 | |
| 1654. |
Digital electronics is based on the _________ numbering system. |
| A. | decimal |
| B. | hexadecimal |
| C. | binary |
| D. | octal |
| Answer» D. octal | |
| 1655. |
The weight of the LSB as a binary number is: |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 1656. |
What is the difference between binary coding and binary coded decimal? |
| A. | Binary coding is pure binary. |
| B. | BCD is pure binary. |
| C. | Binary coding has a decimal format. |
| D. | BCD has no decimal format. |
| Answer» B. BCD is pure binary. | |
| 1657. |
Convert the binary number 1001.0010 to decimal. |
| A. | 125 |
| B. | 12.5 |
| C. | 90.125 |
| D. | 9.125 |
| Answer» E. | |
| 1658. |
A decrease in base current of a C-E amplifier causes the voltage measured between the emitter and the collector to increase. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1659. |
A transistor may be used as a switching device or as a: |
| A. | fixed resistor |
| B. | tuning device |
| C. | rectifier |
| D. | variable resistor |
| Answer» E. | |
| 1660. |
If an input signal ranges from 20 40 A (microamps), with an output signal ranging from .5 1.5 mA (milliamps), what is the ac beta? |
| A. | 0.05 |
| B. | 20 |
| C. | 50 |
| D. | 500 |
| Answer» D. 500 | |
| 1661. |
Voltage-divider bias provides: |
| A. | an unstable Q point |
| B. | a stable Q point |
| C. | a Q point that easily varies with changes in the transistor's current gain |
| D. | a Q point that is stable and easily varies with changes in the transistor s current gain |
| Answer» C. a Q point that easily varies with changes in the transistor's current gain | |
| 1662. |
To operate properly, a transistor's base-emitter junction must be forward biased with reverse bias applied to which junction? |
| A. | collector-emitter |
| B. | base-collector |
| C. | base-emitter |
| D. | collector-base |
| Answer» E. | |
| 1663. |
The ends of a load line drawn on a family of curves determine: |
| A. | saturation and cutoff |
| B. | the operating point |
| C. | the power curve |
| D. | the amplification factor |
| Answer» B. the operating point | |
| 1664. |
If VCC = +18 V, voltage-divider resistor R1 is 4.7 k, and R2 is 1500, what is the base bias voltage? |
| A. | 8.70 V |
| B. | 4.35 V |
| C. | 2.90 V |
| D. | 0.7 V |
| Answer» C. 2.90 V | |
| 1665. |
What is the magnitude of the phase angle of a 24 Vac parallel RL circuit when R = 45 and XL = 1100 ? |
| A. | 0.001 |
| B. | 2.3 |
| C. | 87.6 |
| D. | 89.9 |
| Answer» C. 87.6 | |
| 1666. |
Which is the higher gain provided by a C-E configuration? |
| A. | voltage |
| B. | current |
| C. | resistance |
| D. | power |
| Answer» E. | |
| 1667. |
Which of the following statements is true about a lag network? |
| A. | An increase in frequency causes an increase in phase lag. |
| B. | An increase in frequency causes an increase in the magnitude of the output voltage. |
| C. | A decrease in frequency causes an increase in phase lag. |
| D. | A decrease in frequency causes a decrease in the magnitude of the output voltage. |
| Answer» B. An increase in frequency causes an increase in the magnitude of the output voltage. | |
| 1668. |
Calculate the voltage dropped across L2 in the given circuit. |
| A. | 18 V |
| B. | 6 V |
| C. | 13.5 V |
| D. | 0 V |
| Answer» C. 13.5 V | |
| 1669. |
What is the magnitude of the phase angle between the source voltage and current when a 100 mH inductor with an inductive reactance of 6 k and a 1 k resistor are in series with a source? |
| A. | 0.1 |
| B. | 9.0 |
| C. | 61.0 |
| D. | 81.0 |
| Answer» E. | |
| 1670. |
An open secondary winding of a transformer will cause the primary current to be nearly zero. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1671. |
The secondary voltages produced by a center-tapped transformer are equal in amplitude but 180 out of phase with respect to the center tap. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1672. |
Base 10 refers to which number system? |
| A. | binary coded decimal |
| B. | decimal |
| C. | octal |
| D. | hexadecimal |
| Answer» C. octal | |
| 1673. |
The number of bits used to store a BCD digit is: |
| A. | 8 |
| B. | 4 |
| C. | 1 |
| D. | 2 |
| Answer» C. 1 | |
| 1674. |
Sample-and-hold circuits in ADCs are designed to: |
| A. | sample and hold the output of the binary counter during the conversion process |
| B. | stabilize the ADCs threshold voltage during the conversion process |
| C. | stabilize the input analog signal during the conversion process |
| D. | sample and hold the ADC staircase waveform during the conversion process |
| Answer» D. sample and hold the ADC staircase waveform during the conversion process | |
| 1675. |
When transistors are used in digital circuits they usually operate in the: |
| A. | active region |
| B. | breakdown region |
| C. | saturation and cutoff regions |
| D. | linear region |
| Answer» D. linear region | |
| 1676. |
Three different Q points are shown on a dc load line. The upper Q point represents the: |
| A. | minimum current gain |
| B. | intermediate current gain |
| C. | maximum current gain |
| D. | cutoff point |
| Answer» D. cutoff point | |
| 1677. |
A current ratio of IC/IE is usually less than one and is called: |
| A. | beta |
| B. | theta |
| C. | alpha |
| D. | omega |
| Answer» D. omega | |
| 1678. |
With the positive probe on an NPN base, an ohmmeter reading between the other transistor terminals should be: |
| A. | open |
| B. | infinite |
| C. | low resistance |
| D. | high resistance |
| Answer» D. high resistance | |
| 1679. |
Calculate the voltage dropped across R1 in the given circuit. |
| A. | 14 V |
| B. | 26.8 V |
| C. | 28 V |
| D. | 0 V |
| Answer» C. 28 V | |
| 1680. |
What is the true power of a 24 Vac parallel RL circuit when R = 45 and XL = 1100 ? |
| A. | 313.45 W |
| B. | 12.8 W |
| C. | 44.96 W |
| D. | 22.3 W |
| Answer» C. 44.96 W | |
| 1681. |
The load resistance increases. How will the load current change? |
| A. | vary |
| B. | remain constant |
| C. | increase |
| D. | decrease |
| Answer» E. | |
| 1682. |
What is the power dissipated by a 1.2 k resistor with 12 volts across it? |
| A. | 12 W |
| B. | 1.2 W |
| C. | .12 W |
| D. | 12 mW |
| Answer» D. 12 mW | |
| 1683. |
How many joules of energy will a 10 W lamp dissipate in one minute? |
| A. | 10 joules |
| B. | 60 joules |
| C. | 600 joules |
| D. | 3600 joules |
| Answer» D. 3600 joules | |
| 1684. |
The source is 24 volts and the load resistance is 100 . What is the load current? |
| A. | 2.4 A |
| B. | 240 mA |
| C. | 24 mA |
| D. | 2.4 mA |
| Answer» C. 24 mA | |
| 1685. |
Resistors are identified as to wattage by: |
| A. | size |
| B. | color code |
| C. | types of materials |
| D. | internal construction |
| Answer» B. color code | |
| 1686. |
What type of resistors have a tolerance rating of 5% or greater? |
| A. | precision |
| B. | SIP |
| C. | general-purpose |
| D. | wirewound |
| Answer» D. wirewound | |
| 1687. |
Resistor tolerance is either printed on the component, or is provided by: |
| A. | keyed containers |
| B. | size |
| C. | color code |
| D. | ohmmeter reading |
| Answer» D. ohmmeter reading | |
| 1688. |
The power rating of a resistor is __________ related to __________. |
| A. | directly, the type of cooling used |
| B. | indirectly, the type of material used |
| C. | directly, its surface area |
| D. | indirectly, the color coding |
| Answer» D. indirectly, the color coding | |
| 1689. |
The ramp voltage at the output of an op-amp integrator |
| A. | increases or decreases at a linear rate |
| B. | increases or decreases exponentially |
| C. | is always increasing and never decreasing |
| D. | is constant |
| Answer» B. increases or decreases exponentially | |
| 1690. |
A two-pole high-pass active filter would have a roll-off rate of |
| A. | 40 dB/decade |
| B. | 40 dB/decade |
| C. | 20 dB/decade |
| D. | 20 dB/decade |
| Answer» C. 20 dB/decade | |
| 1691. |
A basic series regulator has |
| A. | an error detector |
| B. | a load |
| C. | a reference voltage |
| D. | both an error detector and a reference voltage |
| Answer» E. | |
| 1692. |
A comparator is an example of a(n) |
| A. | active filter |
| B. | current source |
| C. | linear circuit |
| D. | nonlinear circuit |
| Answer» E. | |
| 1693. |
A triangular-wave oscillator can consist of an op-amp comparator, followed by a(n) |
| A. | differentiator |
| B. | amplifier |
| C. | integrator |
| D. | multivibrator |
| Answer» D. multivibrator | |
| 1694. |
In an averaging amplifier, the input resistances are |
| A. | equal to the feedback resistance |
| B. | less than the feedback resistance |
| C. | greater than the feedback resistance |
| D. | unequal |
| Answer» D. unequal | |
| 1695. |
If the input to a comparator is a sine wave, the output is a |
| A. | ramp voltage |
| B. | sine wave |
| C. | rectangular wave |
| D. | sawtooth wave |
| Answer» D. sawtooth wave | |
| 1696. |
CMOS logic is probably the best all-around circuitry because of its: |
| A. | packing density |
| B. | low power consumption |
| C. | very high noise immunity |
| D. | low power consumption and very high noise immunity |
| Answer» E. | |
| 1697. |
A TTL totem pole circuit is designed so that the output transistors are: |
| A. | always on together |
| B. | providing phase splitting |
| C. | providing voltage regulation |
| D. | never on together |
| Answer» E. | |
| 1698. |
The problem of interfacing IC logic families that have different supply voltages (VCCs) can be solved by using a: |
| A. | level-shifter |
| B. | tri-state shifter |
| C. | translator |
| D. | level-shifter or translator |
| Answer» E. | |
| 1699. |
What quantities must be compatible when interfacing two different logic families? |
| A. | only the currents |
| B. | both the voltages and the currents |
| C. | only the voltages |
| D. | both the power dissipation and the impedance |
| Answer» C. only the voltages | |
| 1700. |
A Karnaugh map will ____________________. |
| A. | eliminate the need for tedious Boolean expressions |
| B. | allow any circuit to be implemented with just AND and OR gates |
| C. | produce the simplest sum-of-products expression |
| D. | give an overall picture of how the signals flow through the logic circuit |
| Answer» D. give an overall picture of how the signals flow through the logic circuit | |