question_number int64 1 10 | question stringclasses 10
values | options dict | correct_answer stringclasses 3
values | explanation stringclasses 10
values |
|---|---|---|---|---|
1 | A microcontroller is a computer in a chip composed of: | {
"A": "CPU, Memory, Oscillator, and Register",
"B": "CPU, Accumulator, ALU, Clock, and Register",
"C": "CPU, I/O Peripherals, Registers, and Clock",
"D": "CPU, Memory, I/O Peripherals, and A/D Converter"
} | D | A microcontroller is a compact integrated circuit designed to govern a specific operation in an embedded system. A typical microcontroller includes a processor (CPU), memory, and input/output (I/O) peripherals on a single chip. [cite: 1] |
2 | Which of the following is not the advantage of Distributed Control Systems? | {
"A": "All the nodes in the distributed system are connected to each other",
"B": "It can be scaled as required",
"C": "Failure of one node does not lead to the failure of the entire distributed system",
"D": "Some messages and data can be lost in the network while moving from one node to another"
} | D | Data loss is a disadvantage or a technical challenge of a network, not an advantage. Advantages of DCS include scalability and reliability through redundancy. [cite: 2] |
3 | A two-winding transformer is | {
"A": "Inductively linked",
"B": "Conductively linked",
"C": "Electrically linked",
"D": "Not linked at all"
} | A | In a two-winding transformer, the primary and secondary windings are not physically connected but are linked by a common magnetic flux (electromagnetic induction). [cite: 2, 3] |
4 | A transformer having 1000 primary turns is connected to a 250V a.c. supply. For a secondary voltage of 400V, the number of secondary turns should be | {
"A": "1600",
"B": "250",
"C": "400",
"D": "1250"
} | A | Using the transformer turns ratio formula (V1/V2 = N1/N2): 250/400 = 1000/N2. Solving for N2: (1000 * 400) / 250 = 1600 turns. [cite: 3, 4] |
5 | Upon the removal of a deforming force, the inability of the body to regain its original shape and size is known as | {
"A": "Plasticity",
"B": "Un-deformation",
"C": "Elasticity",
"D": "Hook's constant"
} | A | Plasticity is the property of a material that allows it to undergo permanent deformation without breaking, meaning it does not return to its original shape. [cite: 5] |
6 | For a second-order system with damping 未=1, the roots of the characteristic equation are | {
"A": "Real but not equal",
"B": "Real and equal",
"C": "Complex conjugate",
"D": "Imaginary"
} | B | When the damping ratio (未) is equal to 1, the system is critically damped, and the roots of the characteristic equation are real and equal. [cite: 5, 6] |
7 | JFET always operates with | {
"A": "The gate-to-source pn junction reverse-biased",
"B": "The gate-to-source pn junction forward-biased",
"C": "The drain connected to the ground",
"D": "The gate connected to the source"
} | A | A Junction Field Effect Transistor (JFET) is always operated with the gate-source junction reverse-biased to control the channel width without allowing gate current to flow. [cite: 6] |
8 | An inverter converts ___ into ___ to allow the current to pass in a single direction. | {
"A": "AC to DC",
"B": "DC to AC",
"C": "AC to AC",
"D": "DC to DC"
} | B | An inverter is a power electronic device that changes direct current (DC) into alternating current (AC). [cite: 6, 7] |
9 | Alternative paths provided by vertical paths from the main rung of a ladder diagram that paths in parallel represent. | {
"A": "Logical AND operation",
"B": "Logical OR operation",
"C": "Logical NOT operation",
"D": "Logical NOR operation"
} | B | In PLC ladder logic, parallel rungs represent a logical OR operation, where any one of the parallel paths being completed will energize the output. [cite: 7, 8] |
10 | How many unique symbols are used in the decimal number system? | {
"A": "Unlimited",
"B": "One",
"C": "Nine",
"D": "Ten"
} | D | The decimal system (base-10) uses ten unique symbols to represent values: 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9. [cite: 8, 9] |
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