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Latest ISRO SDSC SHAR Technician B Exam Question (Objective Questions), MCQ in English

Subjects : Concerned Subject (Electronic Mechanic)

Question Bank ISRO SDSC SHAR Technician B Exam (Electronic Mechanic) - English
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Concerned Subject (Electronic Mechanic)

Question 1Single Answer
What is the primary focus of electronics?
  1. A
    Only electrical systems
  2. B
    The study of circuits and devices that control the flow of electrons
  3. C
    Only mechanical devices
  4. D
    Fluid mechanics
Question 2Single Answer
Which of the following is NOT a field in which electronics is used?
  1. A
    Communications
  2. B
    Medical technology
  3. C
    Textiles
  4. D
    Automation
Question 3Single Answer
Which of the following devices is used to control the flow of current in an electronic circuit?
  1. A
    Resistor
  2. B
    Capacitor
  3. C
    Diode
  4. D
    Transistor
Question 4Single Answer
What is the significance of semiconductors in electronics?
  1. A
    They conduct electricity only in specific conditions
  2. B
    They are perfect conductors of electricity
  3. C
    They do not conduct electricity at all
  4. D
    They act as insulators
Question 5Single Answer
Which electronic component is primarily used to store energy in an electric field?
  1. A
    Resistor
  2. B
    Capacitor
  3. C
    Inductor
  4. D
    Diode
Question 6Single Answer
Which of the following is an example of a passive component in electronics?
  1. A
    Transistor
  2. B
    Diode
  3. C
    Capacitor
  4. D
    Integrated circuit
Question 7Single Answer
What is the role of diodes in electronic circuits?
  1. A
    To amplify signals
  2. B
    To store electrical energy
  3. C
    To allow current to flow in one direction only
  4. D
    To generate alternating current
Question 8Single Answer
What is the primary function of an integrated circuit (IC)?
  1. A
    To resist electrical flow
  2. B
    To amplify signals
  3. C
    To combine multiple components into a single package
  4. D
    To store energy
Question 9Single Answer
In electronics, what does the term “power” generally refer to?
  1. A
    The amount of current in a circuit
  2. B
    The energy consumed by a device per unit time
  3. C
    The resistance in a circuit
  4. D
    The voltage difference across a component
Question 10Single Answer
Which of the following is a key principle in electronics?
  1. A
    Voltage is constant across all components
  2. B
    Resistance always increases in parallel circuits
  3. C
    The flow of current is opposed by resistors
  4. D
    Capacitors resist voltage changes
Question 11Single Answer
Which of the following is the unit of current?
  1. A
    Volt
  2. B
    Ohm
  3. C
    Ampere
  4. D
    Watt
Question 12Single Answer
What does Ohm's Law state?
  1. A
    Power is proportional to voltage
  2. B
    Voltage is proportional to current and resistance
  3. C
    Current is proportional to voltage
  4. D
    Resistance is constant for all materials
Question 13Single Answer
What is the formula for Ohm’s Law?
  1. A
    V = I + R
  2. B
    P = V × I
  3. C
    V = I × R
  4. D
    I = V × R
Question 14Single Answer
If the voltage across a resistor is 12V and the current through it is 2A, what is the resistance?
  1. A
    24 Ohms
  2. B
    6 Ohms
  3. C
    5 Ohms
  4. D
    2 Ohms
Question 15Single Answer
In a circuit, if the current is 4A and the resistance is 10 Ohms, what is the voltage?
  1. A
    40V
  2. B
    14V
  3. C
    4V
  4. D
    2.5V
Question 16Single Answer
What does a resistor do in an electrical circuit?
  1. A
    Increases the current
  2. B
    Stores electrical energy
  3. C
    Limits the current
  4. D
    Reduces the voltage
Question 17Single Answer
What is the total resistance in a series circuit with three resistors of 2 Ohms, 4 Ohms, and 6 Ohms?
  1. A
    12 Ohms
  2. B
    3 Ohms
  3. C
    4 Ohms
  4. D
    2 Ohms
Question 18Single Answer
What is the total resistance in a parallel circuit with three resistors of 2 Ohms, 4 Ohms, and 6 Ohms?
  1. A
    12 Ohms
  2. B
    3 Ohms
  3. C
    1.14 Ohms
  4. D
    5 Ohms
Question 19Single Answer
In an electrical circuit, which of the following is true about voltage in a series circuit?
  1. A
    The voltage is the same across all components
  2. B
    The total voltage is divided across components
  3. C
    Voltage is not used in a series circuit
  4. D
    Voltage decreases as current increases
Question 20Single Answer
In a parallel circuit, what happens to the total current when more branches are added?
  1. A
    It remains constant
  2. B
    It decreases
  3. C
    It increases
  4. D
    It depends on the resistance
Question 21Single Answer
Which component stores electrical charge in an electric field?
  1. A
    Resistor
  2. B
    Capacitor
  3. C
    Diode
  4. D
    Inductor
Question 22Single Answer
In an AC circuit, what is the primary difference between AC and DC?
  1. A
    AC is constant in direction, DC changes direction
  2. B
    DC flows in one direction, AC periodically reverses direction
  3. C
    Both AC and DC flow in multiple directions
  4. D
    AC is used in batteries, DC is used in power plants
Question 23Single Answer
Which of the following is used to measure the current in a circuit?
  1. A
    Voltmeter
  2. B
    Ammeter
  3. C
    Ohmmeter
  4. D
    Wattmeter
Question 24Single Answer
What is the total power consumed in a circuit with a 10V battery and a 5A current?
  1. A
    15W
  2. B
    50W
  3. C
    100W
  4. D
    500W
Question 25Single Answer
What is the role of a capacitor in an AC circuit?
  1. A
    It stores energy and releases it slowly
  2. B
    It blocks DC but allows AC to pass
  3. C
    It stores energy as magnetic fields
  4. D
    It increases the resistance of the circuit
Question 26Single Answer
If the power in a circuit is 100W and the current is 2A, what is the voltage?
  1. A
    200V
  2. B
    50V
  3. C
    100V
  4. D
    10V
Question 27Single Answer
What is the total resistance in a parallel circuit with two resistors of 4 Ohms and 6 Ohms?
  1. A
    2.4 Ohms
  2. B
    10 Ohms
  3. C
    1.5 Ohms
  4. D
    2 Ohms
Question 28Single Answer
Which of the following is true about Ohm’s Law?
  1. A
    Resistance increases as current increases
  2. B
    Voltage is directly proportional to current
  3. C
    Voltage is inversely proportional to current
  4. D
    Resistance and current are independent of each other
Question 29Single Answer
Which of the following is used to limit the flow of current in a circuit?
  1. A
    Inductor
  2. B
    Capacitor
  3. C
    Resistor
  4. D
    Diode
Question 30Single Answer
What is the unit of electrical power?
  1. A
    Ampere
  2. B
    Volt
  3. C
    Watt
  4. D
    Ohm
Question 31Single Answer
What is the purpose of an inductor in an AC circuit?
  1. A
    To store electrical energy
  2. B
    To oppose changes in current
  3. C
    To increase the voltage
  4. D
    To reduce the resistance
Question 32Single Answer
How is electric current defined?
  1. A
    The flow of protons
  2. B
    The flow of electrons
  3. C
    The flow of neutrons
  4. D
    The movement of energy
Question 33Single Answer
What is the formula for calculating electrical power?
  1. A
    P = V × R
  2. B
    P = V / R
  3. C
    P = I × V
  4. D
    P = I × R
Question 34Single Answer
Which of the following materials is a good conductor of electricity?
  1. A
    Rubber
  2. B
    Plastic
  3. C
    Copper
  4. D
    Wood
Question 35Single Answer
Which of the following is used to measure the resistance of a component?
  1. A
    Ammeter
  2. B
    Voltmeter
  3. C
    Ohmmeter
  4. D
    Wattmeter
Question 36Single Answer
What is the function of a fuse in an electrical circuit?
  1. A
    To store electrical energy
  2. B
    To break the circuit in case of an overload
  3. C
    To increase the voltage
  4. D
    To regulate the current
Question 37Single Answer
In a series circuit, if one component fails, what happens to the other components?
  1. A
    They continue to work normally
  2. B
    They may also stop functioning
  3. C
    They function more efficiently
  4. D
    They increase their voltage
Question 38Single Answer
Which of the following best describes the behavior of an ideal conductor?
  1. A
    It resists current flow
  2. B
    It allows current to flow without resistance
  3. C
    It stores electrical charge
  4. D
    It generates electrical energy
Question 39Single Answer
What is the effect of increasing the resistance in a circuit while keeping the voltage constant?
  1. A
    The current increases
  2. B
    The current decreases
  3. C
    The voltage increases
  4. D
    The power output increases
Question 40Single Answer
Which of the following is the correct formula to calculate the total resistance in a series circuit?
  1. A
    R = R1 + R2 + R3 + ...
  2. B
    R = 1 / (1/R1 + 1/R2)
  3. C
    R = V / I
  4. D
    R = I / V
Question 41Single Answer
What is the primary use of a flat file in electronics work?
  1. A
    Smoothing metal surfaces
  2. B
    Cutting wires
  3. C
    Drilling holes
  4. D
    Soldering components
Question 42Single Answer
Which tool is used for cutting metal sheets in basic metalwork?
  1. A
    Pliers
  2. B
    Screwdriver
  3. C
    Hacksaw
  4. D
    Soldering iron
Question 43Single Answer
What is the function of a center punch in electronics fabrication?
  1. A
    To strip wires
  2. B
    To cut metal
  3. C
    To tighten screws
  4. D
    To mark a point for drilling
Question 44Single Answer
Which tool is used to remove insulation from wires?
  1. A
    Hacksaw
  2. B
    Wire stripper
  3. C
    File
  4. D
    Drill
Question 45Single Answer
What is the purpose of a bench vise in electronics work?
  1. A
    To solder wires
  2. B
    To measure voltage
  3. C
    To hold components securely
  4. D
    To cut cables
Question 46Single Answer
Which tool is used for precision cutting of small metal parts?
  1. A
    Hacksaw
  2. B
    File
  3. C
    Jeweler’s saw
  4. D
    Drill
Question 47Single Answer
What is the use of a tap and die set in electronics fabrication?
  1. A
    To measure resistance
  2. B
    To create threads in metal
  3. C
    To strip wires
  4. D
    To solder components
Question 48Single Answer
Which tool is used to make small holes in a PCB?
  1. A
    Hacksaw
  2. B
    Hand drill
  3. C
    Screwdriver
  4. D
    Pliers
Question 49Single Answer
What is the function of needle-nose pliers in electronics?
  1. A
    To cut large cables
  2. B
    To smooth surfaces
  3. C
    To bend and shape small wires
  4. D
    To drill holes
Question 50Single Answer
Which tool is used to tighten or loosen screws in electronics assembly?
  1. A
    File
  2. B
    Screwdriver
  3. C
    Hacksaw
  4. D
    Wire stripper
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