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MCQOPTIONS
This section includes 4320 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 4001. |
When operating above its resonant frequency, a series RLC circuit has the characteristics of a: |
| A. | series RL circuit |
| B. | series RC circuit |
| C. | series RLC circuit operated below its resonant frequency |
| D. | purely resistive circuit |
| E. | None of the above |
| Answer» B. series RC circuit | |
| 4002. |
At cut off, the Q point is at |
| A. | upper end of the load line |
| B. | middle of the load line |
| C. | lower end of the load line |
| D. | infinity |
| E. | None of the above |
| Answer» D. infinity | |
| 4003. |
The south pole of a magnet is the one: |
| A. | that would be attracted to the earths north magnetic pole |
| B. | that has its molecules arranged in a random pattern |
| C. | that would be attracted to the earth's south magnetic pole |
| D. | that would be repelled by the north pole of another magnet |
| E. | None of the above |
| Answer» D. that would be repelled by the north pole of another magnet | |
| 4004. |
The valence electron of a copper atom experiences what kind of attraction toward the nucleus? |
| A. | Strong |
| B. | Neutral |
| C. | Weak |
| D. | Impossible to say |
| E. | None of the above |
| Answer» D. Impossible to say | |
| 4005. |
Suppose a step-down transformer has a turns ration of 5:1. If the secondary current is 1A rms, what is the primary-current? |
| A. | 0.3 A |
| B. | 0.2 A |
| C. | 0.4 A |
| D. | 0.6 A |
| E. | None of the above |
| Answer» C. 0.4 A | |
| 4006. |
The peak value of a sine waveform is: |
| A. | the amplitude at 70.7% of the maximum value |
| B. | the amplitude at 90% of the maximum value |
| C. | the amplitude at 1.41 times the maximum value |
| D. | the maximum positive or negative value |
| E. | None of the above |
| Answer» E. None of the above | |
| 4007. |
If N1/N2 = 2, and the primary voltage is 120 V, what is the secondary voltage? |
| A. | 0 V |
| B. | 36 V |
| C. | 40 V |
| D. | 60 V |
| E. | None of the above |
| Answer» E. None of the above | |
| 4008. |
A device that converts light energy to electrical energy is called a: |
| A. | thermocouple |
| B. | solar cell |
| C. | photodiode |
| D. | photo transistor |
| E. | None of the above |
| Answer» C. photodiode | |
| 4009. |
How much current flows through a 60-W light bulb that is operating at 120 V? |
| A. | 0.5A |
| B. | 180 A |
| C. | 2 A |
| D. | 7200 A |
| E. | None of the above |
| Answer» B. 180 A | |
| 4010. |
The basic unit of measurement for resistance is the: |
| A. | volt |
| B. | ampere |
| C. | ohm |
| D. | watt |
| E. | None of the above |
| Answer» D. watt | |
| 4011. |
What is the phase shift between total current and voltage, if 100 ohm resistor connected in parallel with an inductor that has a reactance of 200W? |
| A. | 0 degree |
| B. | 26.6 degree |
| C. | 90 degree |
| D. | 180 degree |
| E. | None of the above |
| Answer» C. 90 degree | |
| 4012. |
Suppose a voltage source has an ideal voltage of 15V and a source resistance of 0.2W. For what values of load resistance will the voltage source appear stiff? |
| A. | 20 Ohm |
| B. | 30 Ohm |
| C. | 10 Ohm |
| D. | 100 Ohm |
| E. | None of the above |
| Answer» B. 30 Ohm | |
| 4013. |
A real voltage source has |
| A. | Zero internal resistance |
| B. | Infinite internal resistance |
| C. | A small internal resistance |
| D. | A large internal resistance |
| E. | None of the above |
| Answer» D. A large internal resistance | |
| 4014. |
The voltage across a 1N4001 is 0.93V when the current is 1A. What is the power dissipation of the diode for these values? |
| A. | 0.93 W |
| B. | 0.93 V |
| C. | 1 A |
| D. | 9.3 W |
| E. | None of the above |
| Answer» B. 0.93 V | |
| 4015. |
A loadstone is: |
| A. | a natural magnet |
| B. | a temporary magnet |
| C. | an artificial magnet |
| D. | a paramagnetic alloy |
| E. | None of the above |
| Answer» B. a temporary magnet | |
| 4016. |
Which one of the following phrases most accurately describes a purely capacitive circuit? |
| A. | Resistances provide the only opposition to current flow |
| B. | Capacitive reactance provides the only opposition to current flow |
| C. | The ac voltage leads the current by 90 degree |
| D. | Combinations of resistance and capacitive reactance provide any opposition to current flow |
| E. | None of the above |
| Answer» C. The ac voltage leads the current by 90 degree | |
| 4017. |
The saturation point is approximately the same as |
| A. | cutoff point |
| B. | lower end of the load line |
| C. | upper end of the load line |
| D. | infinity |
| E. | None of the above |
| Answer» D. infinity | |
| 4018. |
Which one of the following statements is true for the currents in a series RC circuit? |
| A. | The current always has the same amplitude and phase for every part of the circuit |
| B. | The total current is equal to the sum of the currents for the resistance and capacitance |
| C. | The total current is greater than the sum of the currents for the resistance and capacitance |
| D. | The total current is less than the sum of the currents for the resistance and capacitance |
| E. | None of the above |
| Answer» B. The total current is equal to the sum of the currents for the resistance and capacitance | |
| 4019. |
A transistor has how many doped regions? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| E. | None of the above |
| Answer» D. 4 | |
| 4020. |
A circuit has two different voltage sources that are connected in a series-opposing form. If the sources are rated at 6 V and 9 V, what is the total source voltage? |
| A. | 3 V |
| B. | 16 V |
| C. | 7.5 V |
| D. | 8 V |
| E. | None of the above |
| Answer» B. 16 V | |
| 4021. |
The emitter diode is usually |
| A. | Forward-biased |
| B. | Reverse-biased |
| C. | Nonconducting |
| D. | Operating in the breakdwon region |
| E. | None of the above |
| Answer» B. Reverse-biased | |
| 4022. |
An intrinsic semiconductor has some holes in it at room temperature. What causes these holes? |
| A. | Doping |
| B. | Valence electrons |
| C. | Free electrons |
| D. | Thermal energy |
| E. | None of the above |
| Answer» E. None of the above | |
| 4023. |
Which one of the following statements is true? |
| A. | inductive reactance decreases with operating frequency |
| B. | inductive reactance is at a maximum for dc source voltages |
| C. | inductive reactance increases with operating frequency |
| D. | There is no meaningful relationship between inductive reactance and operating frequency |
| E. | None of the above |
| Answer» D. There is no meaningful relationship between inductive reactance and operating frequency | |
| 4024. |
A device that converts chemical energy to electrical energy is called a: |
| A. | solar cell |
| B. | thermocouple |
| C. | chemical cell |
| D. | electric device |
| E. | None of the above |
| Answer» D. electric device | |
| 4025. |
The total capacitance of a series capacitor circuit is: |
| A. | equal to the sun of the individual capacitive-reactance values |
| B. | equal to the sum of the individual capacitance values |
| C. | equal to the source voltage divided by total current |
| D. | less than the value of the smallest capacitor |
| E. | None of the above |
| Answer» E. None of the above | |
| 4026. |
A zener diode has a voltage of 10 V and a current of 20 mA. What is the power dissipation? |
| A. | 200 mW |
| B. | 300 mW |
| C. | 20 mW |
| D. | 10 mW |
| E. | None of the above |
| Answer» B. 300 mW | |
| 4027. |
Which one of the following phrasers best describes flux density? |
| A. | The concentration of lines of magnetic force |
| B. | The rate of change of the number of lines of magnetic force |
| C. | The opposition to a build-up of magnetic fields |
| D. | The force that maintains lines of force |
| E. | None of the above |
| Answer» B. The rate of change of the number of lines of magnetic force | |
| 4028. |
Which is the most widely used semiconductor? |
| A. | Copper |
| B. | Silicon |
| C. | Germanium |
| D. | All of the above |
| E. | None of the above |
| Answer» C. Germanium | |
| 4029. |
An audio transformer has a turn ratio of 9, What is its impedance ratio? |
| A. | 81 |
| B. | 85 |
| C. | 6 |
| D. | 9 |
| E. | None of the above |
| Answer» B. 85 | |
| 4030. |
The transistor has a current gain of 175. If the base current is 0.1 mA, what is the collector current? |
| A. | 1750 mA |
| B. | 17.5 mA |
| C. | 175 mA |
| D. | 1.75 mA |
| E. | None of the above |
| Answer» C. 175 mA | |
| 4031. |
If the base supply voltage increases, the Q point moves |
| A. | down |
| B. | up |
| C. | nowhere |
| D. | off the load line |
| E. | None of the above |
| Answer» B. up | |
| 4032. |
Positive ions are atoms that have |
| A. | Gained a proton |
| B. | Lost a proton |
| C. | Gained an electron |
| D. | Lost an electron |
| E. | None of the above |
| Answer» E. None of the above | |
| 4033. |
Which one of the following is a statement of Kirchhoffs current law? |
| A. | The current through a resistance is proportional to the value of resistance and the IR drop across it |
| B. | The total current in a parallel circuit is less than the value of the smallest current |
| C. | The algebraic sum of currents in a loop is equal to zero |
| D. | The algebraic sum of currents entering and leaving a point is equal to zero |
| E. | None of the above |
| Answer» D. The algebraic sum of currents entering and leaving a point is equal to zero | |
| 4034. |
Voltage is |
| A. | The flow of charged particles through a material |
| B. | The smallest electrically charged particle |
| C. | Trie force that causes electrons to flow |
| D. | The number of free electrons in an atom |
| E. | None of the above |
| Answer» D. The number of free electrons in an atom | |
| 4035. |
What is the turns ratio for the transformer specified in the above question? |
| A. | 10.738 |
| B. | 0.707 |
| C. | 1.5 |
| D. | 0.575 |
| E. | None of the above |
| Answer» C. 1.5 | |
| 4036. |
The total impedance of a series RLC circuit: |
| A. | is minimum at the resonant frequency |
| B. | always increases as the applied frequency increases |
| C. | always decreases as the applied frequency increases |
| D. | is maximum at the resonant frequency |
| E. | None of the above |
| Answer» B. always increases as the applied frequency increases | |
| 4037. |
Which one of the following statements is true for the voltages in a series RL circuit? |
| A. | The total voltages is equal to the sum of the voltages across the resistance and inductance |
| B. | The voltage always has the same amplitude and phase for every part of the circuit |
| C. | The total voltage is less than the sum of the voltages across the resistance and inductance |
| D. | The total voltage lags the total current by less than 90 |
| E. | None of the above |
| Answer» D. The total voltage lags the total current by less than 90 | |
| 4038. |
The core of an electromagnet is said to be in saturation when: |
| A. | the core is permitted to move freely within the coil |
| B. | an increase in current through the coil causes no further increase in the mmf |
| C. | frequent changes in the direction of current through the coil causes heating effects in the core material |
| D. | changing the polarity of the current in the coil changes the polarity of the magnetic field around the core |
| E. | None of the above |
| Answer» C. frequent changes in the direction of current through the coil causes heating effects in the core material | |
| 4039. |
As the temperature increases, the current gain |
| A. | increases |
| B. | decreases |
| C. | contant |
| D. | can be any of the above |
| E. | None of the above |
| Answer» B. decreases | |
| 4040. |
What is a negative ion? |
| A. | An atom that contains more electrons than neutrons |
| B. | An atom that contains more protons than neutrons |
| C. | An atom that contains more electrons than protons |
| D. | An atom that contains more protons than electrons |
| E. | None of the above |
| Answer» D. An atom that contains more protons than electrons | |
| 4041. |
In a transistor operates at the middle of the load line, an increase in the base resistance will move the Q point |
| A. | down |
| B. | up |
| C. | nowhere |
| D. | off the load line |
| E. | None of the above |
| Answer» B. up | |
| 4042. |
Doubling the diameter of the coil in an inductor: |
| A. | multiplies the value of inductance by two |
| B. | reduces the value of inductance by one-half |
| C. | reduces the value of inductance by one-fourth |
| D. | multiplies the value of inductance by four |
| E. | None of the above |
| Answer» B. reduces the value of inductance by one-half | |
| 4043. |
Assuming 100% efficiency, what is the power being consumed at the secondary winding of the transformer described in question 91? |
| A. | 200 W |
| B. | 1000 W |
| C. | 20 W |
| D. | 100 W |
| E. | None of the above |
| Answer» B. 1000 W | |
| 4044. |
Terminal Table |
| A. | a permanent table which lists all key words and special symbols of the language in symbolic form |
| B. | a permanent table of decision rules in the form of patterns for matching with the uniform symbol table to discover syntactic structure |
| C. | consists of a full or partial list of the tokens as they appear in the program. Created by Lexical analysis and used for syntax analysis and interpretation |
| D. | contains all constants in the program |
| Answer» B. a permanent table of decision rules in the form of patterns for matching with the uniform symbol table to discover syntactic structure | |
| 4045. |
A compiler for a high-level language that runs on one machine and produces code for a different machine is called |
| A. | optimizing compiler |
| B. | one pass compiler |
| C. | cross compiler |
| D. | multipass compiler |
| Answer» D. multipass compiler | |
| 4046. |
Assembly code data base is associated with |
| A. | a permanent table which lists all key words and special symbols of the language in symbolic form |
| B. | a permanent table of decision rules in the form of patterns for matching with the uniform symbol table to discover syntactic structure |
| C. | consists of a full or partial list or the tokens as they appear in the program. Created by Lexical analysis and used for syntax analysis and interpretation |
| D. | assembly language version of the program which is created by the code generation phase and is input to the assembly phase |
| Answer» E. | |
| 4047. |
Indicate which of the following is not true about 4GL? |
| A. | 4GL does not support a high-level of screen interaction |
| B. | Many database management system packages support 4GLs |
| C. | A 4GL is a software tool which is written, possibly, in some third generation language |
| D. | All of the above |
| Answer» B. Many database management system packages support 4GLs | |
| 4048. |
Convert the BRNE h#01E6, i assembly language instructions into hexadecimal machine language: |
| A. | 0111EF |
| B. | 9001E6 |
| C. | DA000F |
| D. | 40 |
| Answer» C. DA000F | |
| 4049. |
If special forms are needed for printing the output, the programmer specifies these forms through |
| A. | JCL |
| B. | IPL |
| C. | Utility programs |
| D. | Load modules |
| Answer» B. IPL | |
| 4050. |
Which of the following systems software does the job of merging the records from two flies into one? |
| A. | Documentation system |
| B. | Utility program |
| C. | Networking software |
| D. | Security software |
| Answer» C. Networking software | |