

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.
4101. |
Which one of the following statements is true for voltage in a series circuit? |
A. | The total voltage is equal to the sum of the individual voltages in a series circuit |
B. | The total voltage in a series circuit is equal to the average value of the individual voltages |
C. | The total voltage of a series circuit is equal to the total current divided by the total resistance |
D. | The total voltage in a series circuit is always less than the value of the smallest voltage |
E. | None of the above |
Answer» B. The total voltage in a series circuit is equal to the average value of the individual voltages | |
4102. |
A basic capacitor is composed of: |
A. | two conductors separated by a dielectric |
B. | two dielectrics separated by a conductor |
C. | two coils separated by a dielectric |
D. | two coils separated by a conductor |
E. | None of the above |
Answer» B. two dielectrics separated by a conductor | |
4103. |
Which one of the following devices is most often used for measuring electrical potential difference? |
A. | Voltmeter |
B. | Ohmmeter |
C. | Ammeter |
D. | Wattmeter |
E. | None of the above |
Answer» B. Ohmmeter | |
4104. |
The graph of current gain versus collector current indicates that the current gain |
A. | varies enormously |
B. | is contant |
C. | varies slightly |
D. | equals the collector current divided by the base current |
E. | None of the above |
Answer» E. None of the above | |
4105. |
A device that converts mechanical pressure to electrical energy is called a: |
A. | piezoelectric device |
B. | solar cell |
C. | photodiode |
D. | nicad cell |
E. | None of the above |
Answer» B. solar cell | |
4106. |
Which one of the following statements is true for the voltage in a parallel RC circuit? |
A. | The voltage always has the same amplitude and phase for every part of the circuit |
B. | The total voltage is equal to the sum of the voltages across the resistance and capacitance |
C. | The total voltage leads the total current by less than 90 degree |
D. | The total voltage is less than the sum of the voltages across the resistance and capacitance |
E. | None of the above |
Answer» B. The total voltage is equal to the sum of the voltages across the resistance and capacitance | |
4107. |
The Thevenin resistance is equal in value to the |
A. | Load resistance |
B. | Half the load resistance |
C. | Internal resistance of a Morton circuit |
D. | Open-load resistance |
E. | None of the above |
Answer» B. Half the load resistance | |
4108. |
Most AC power is obtained from: |
A. | generators |
B. | batteries |
C. | oscillators |
D. | lightning |
E. | None of the above |
Answer» D. lightning | |
4109. |
Which one of the following statements is true for the currents in a parallel RL circuit? |
A. | The total current is equal to the sum of the currents through the resistance and inductance |
B. | The current always has the same amplitude and phase for every part of the circuit |
C. | The total current is less than the sum of the currents through the resistance and inductance |
D. | The total current leads the total voltage by less than 90 |
E. | None of the above |
Answer» D. The total current leads the total voltage by less than 90 | |
4110. |
When the Q point moves along the load line, the voltage increases when the current |
A. | Decreases |
B. | Stays the same |
C. | Increases |
D. | Can be any of above |
E. | None of the above |
Answer» D. Can be any of above | |
4111. |
For normal operation of the transistor, the collector diode has to be |
A. | Forward-biased |
B. | Reverse-biased |
C. | Nonconducting |
D. | Operating in the breakdown region |
E. | None of the above |
Answer» C. Nonconducting | |
4112. |
In a step-down transformer, which is larger? |
A. | Primary voltage |
B. | Secondary voltage |
C. | Neither |
D. | Impossible to say |
E. | None of the above |
Answer» B. Secondary voltage | |
4113. |
Silicon atoms combine into an orderly pattern called a |
A. | Crystal |
B. | Covalent bond |
C. | Semiconductor |
D. | Valence orbit |
E. | None of the above |
Answer» B. Covalent bond | |
4114. |
The rotating coil of wire in an electric motor is called the: |
A. | armature |
B. | brush |
C. | commutator |
D. | loop |
E. | None of the above |
Answer» B. brush | |
4115. |
The direction of electron current flow is: |
A. | from right to left |
B. | from positive to negative |
C. | from negative to positive |
D. | from neutral to positive |
E. | None of the above |
Answer» D. from neutral to positive | |
4116. |
Current and voltage are said to be in phase when: |
A. | their waveforms are both ac or both dc |
B. | they have the same amplitude and frequency |
C. | their waveforms cross through zero and reach positive and negative peaks at the same time |
D. | All of the above |
E. | None of the above |
Answer» D. All of the above | |
4117. |
The generic type in a template function |
A. | must be T |
B. | can be T |
C. | cannot be T for functions you create, but may be for C++'s built-in functions |
D. | cannot be T |
Answer» C. cannot be T for functions you create, but may be for C++'s built-in functions | |
4118. |
When a child class function is called, the compiler looks first for a matching function name in the _____ |
A. | class of the object using the function name |
B. | immediate ancestor class |
C. | base class |
D. | descendant class |
Answer» B. immediate ancestor class | |
4119. |
To be called object-oriented, a programming language must allow |
A. | functions that return only a single value |
B. | #include files |
C. | inheritance |
D. | All of the above |
Answer» D. All of the above | |
4120. |
A function that returns no values to the program that calls it is _____ |
A. | not allowed in C++ |
B. | type void |
C. | type empty |
D. | type barren |
Answer» C. type empty | |
4121. |
The keyword used to define a structure is _____ |
A. | stru |
B. | stt |
C. | struct |
D. | structure |
Answer» D. structure | |
4122. |
If container classes are carefully constructed, then these tools are available to work with structures that are not ______ |
A. | valid without container classes |
B. | programmer-defined |
C. | type-specific |
D. | public |
Answer» D. public | |
4123. |
Header files often have the file extension _____ |
A. | .H |
B. | .HE |
C. | .HEA |
D. | .HEAD |
Answer» B. .HE | |
4124. |
Some Streams work with input, and some with output |
A. | True |
B. | False |
Answer» B. False | |
4125. |
If you design a class that needs special initialization tasks, you will want to design a(n) _____ |
A. | housekeeping routine |
B. | initializer |
C. | constructor |
D. | compiler |
Answer» D. compiler | |
4126. |
Which type of statement does not occur in computer programs? |
A. | sequence |
B. | loop |
C. | denial |
D. | selection |
Answer» D. selection | |
4127. |
The newline character is always included between |
A. | pair of parentheses |
B. | pair of curly braces |
C. | control string |
D. | & |
E. | None of the above |
Answer» D. & | |
4128. |
Evaluate the following expression: 3 >6&&7>4 |
A. | True |
B. | False |
Answer» C. | |
4129. |
Which of the following are valid characters for a numeric literal constant? |
A. | a comma |
B. | a dollar sign ($) |
C. | a percent sign (%) |
D. | a space |
E. | None of the above |
Answer» F. | |
4130. |
A function that changes the state of the cout object is called a(n) _____ |
A. | member |
B. | adjuster |
C. | manipulator |
D. | operator |
Answer» D. operator | |
4131. |
A C++ program contains a function with the header int function(double d, char c). Which of the following function headers could be used within the same program? |
A. | char function(double d, char c) |
B. | int function(int d, char c) |
C. | both (a) and (b) |
D. | neither (a) nor (b) |
Answer» C. both (a) and (b) | |
4132. |
A function that is called automatically each time an object is destroyed is a |
A. | constructor |
B. | destructor |
C. | destroyer |
D. | terminator |
Answer» C. destroyer | |
4133. |
Redirection redirects |
A. | a stream from a file to the screen |
B. | a file from a device to a stream |
C. | a device from the screen to a file |
D. | the screen from a device to a stream |
Answer» B. a file from a device to a stream | |
4134. |
You mark the beginning of a function's block of code with the _____ |
A. | / |
B. | * |
C. | { |
D. | } |
E. | either (c) or (d) can be used |
Answer» D. } | |
4135. |
The best form of coupling is _____ |
A. | complete |
B. | tight |
C. | loose |
D. | free |
Answer» D. free | |
4136. |
Paying attention to the important properties while ignoring inessential details is known as________ |
A. | selectiveness |
B. | polymorphism |
C. | abstraction |
D. | summarizing |
Answer» D. summarizing | |
4137. |
What does C++ append to the end of a string literal constant? |
A. | a space |
B. | a number sign (#) |
C. | an asterisk (*) |
D. | a null character |
Answer» E. | |
4138. |
An array name is a _____ |
A. | subscript |
B. | formal parameter |
C. | memory address |
D. | prototype |
Answer» D. prototype | |
4139. |
To enter a comment in a C++ program, you begin the comment with _____ |
A. | ** |
B. | && |
C. | |
D. | |
E. | @// |
Answer» F. | |
4140. |
Which one of the following phrases most accurately describes a purely inductive circuit? |
A. | Resistances provide the only opposition to current flow |
B. | Inductive reactance provides the only opposition to current flow |
C. | Combinations of resistance and inductive reactance provide any opposition to current flow |
D. | The ac voltage lags the current by 90 degree |
E. | None of the above |
Answer» C. Combinations of resistance and inductive reactance provide any opposition to current flow | |
4141. |
For a pure capacitor: |
A. | ac current and voltage are exactly in phase |
B. | ac current leads the voltage by 90 degree |
C. | ac current is converted to dc voltage |
D. | ac current lags the voltage by 90 degree |
E. | None of the above |
Answer» C. ac current is converted to dc voltage | |
4142. |
Which one of the following statements best applies to a parallel RLC circuit? |
A. | The voltage waveform for each component always has the same amplitude and phase as the applied voltage |
B. | The sum of the current is always less than the applied current |
C. | The current waveform for each component always has the same amplitude and phase as the applied current |
D. | All of the above |
E. | None of the above |
Answer» B. The sum of the current is always less than the applied current | |
4143. |
The equivalent of 1 micro A is: |
A. | 10000A |
B. | 1000 A |
C. | one-millionth of an ampere |
D. | one million amperes |
E. | None of the above |
Answer» D. one million amperes | |
4144. |
The component that forms the electrical connection between the rotating coil of wire in a motor and the external source of electrical energy is called the: |
A. | rotor |
B. | armature |
C. | battery |
D. | commutator |
E. | None of the above |
Answer» E. None of the above | |
4145. |
In a pure inductor: |
A. | ac current leads the voltage by 90 degree |
B. | ac current and voltage are exactly in phase |
C. | ac current lags the voltage by 90 degree |
D. | ac current is converted to dc voltage |
E. | None of the above |
Answer» D. ac current is converted to dc voltage | |
4146. |
Waveforms are graphs that show: |
A. | frequency on the vertical axis and amplitude on the horizontal axis |
B. | amplitude on the vertical axis and frequency on the horizontal axis |
C. | amplitude on the vertical axis and the passage of time on the horizontal axis |
D. | the passage of time on the vertical axis and amplitude on the horizontal axis |
E. | None of the above |
Answer» D. the passage of time on the vertical axis and amplitude on the horizontal axis | |
4147. |
When the collector current increases, what does the current gain do? |
A. | decreases |
B. | stays the same |
C. | increases |
D. | any of the above |
E. | None of the above |
Answer» D. any of the above | |
4148. |
The transistor has a collector current of 10 mA and a base current of 40 mA. What is the current gain of the transistor? |
A. | 250 A |
B. | 350 A |
C. | 0.25 A |
D. | 300 A |
E. | None of the above |
Answer» B. 350 A | |
4149. |
A default catch block catches |
A. | all thrown objects |
B. | no thrown objects |
C. | any thrown object that has not been caught by an earlier catch block |
D. | all thrown objects that have been caught by an earlier catch block |
Answer» D. all thrown objects that have been caught by an earlier catch block | |
4150. |
Adding a derived class to a base class requires fundamental changes to the base class |
A. | True |
B. | False |
Answer» C. | |