Multimeter: usage and measurement techniques MCQs

1. What is the primary function of a multimeter?

A. Measure only voltage B. Measure current and voltage C. Measure voltage, current, and resistance D. Measure only resistance Answer: C. Measure voltage, current, and resistance

2. Which of the following measurements can be performed using a digital multimeter?

A. Voltage B. Current C. Resistance D. All of the above Answer: D. All of the above

3. In a digital multimeter (DMM), the unit for measuring voltage is:

A. Ohm (Ω) B. Ampere (A) C. Volt (V) D. Watt (W) Answer: C. Volt (V)

4. When using a multimeter to measure current, it should be connected in which way?

A. In series with the circuit B. In parallel with the circuit C. Across the voltage source D. It does not matter Answer: A. In series with the circuit

5. Which of the following is the correct setting on a multimeter to measure resistance?

A. DC Voltage setting B. AC Voltage setting C. Ohm (Ω) setting D. Ampere (A) setting Answer: C. Ohm (Ω) setting

6. What is the range of a typical multimeter’s voltage measurement for AC voltage?

A. 0-50 V B. 0-1000 V C. 0-10 V D. 0-5 V Answer: B. 0-1000 V

7. When measuring current with a multimeter, what could happen if the multimeter is set to measure voltage instead of current?

A. The multimeter will measure resistance B. The multimeter will show an incorrect value C. The multimeter could get damaged or blown D. The multimeter will work fine Answer: C. The multimeter could get damaged or blown

8. In a multimeter, which of the following is true about the internal resistance of the multimeter when measuring voltage?

A. It is very high B. It is low C. It is zero D. It is variable Answer: A. It is very high

9. If you are using a multimeter to measure voltage, which of the following is the correct connection method?

A. The multimeter should be placed in series with the circuit B. The multimeter should be connected in parallel to the component or circuit element C. The multimeter should be connected in parallel with the power source D. The multimeter should be connected to ground Answer: B. The multimeter should be connected in parallel to the component or circuit element

10. In the context of a multimeter, what does the ‘auto range’ feature do?

A. It automatically selects the correct type of measurement B. It adjusts the measurement range based on the signal strength C. It automatically sets the voltage to the correct level D. It shows only one type of measurement at a time Answer: B. It adjusts the measurement range based on the signal strength

11. What could happen if you set the multimeter to measure current and connect it across a voltage source (instead of in series with the load)?

A. The multimeter will show the total circuit current B. The multimeter may blow a fuse or get damaged C. The multimeter will measure resistance D. The multimeter will measure voltage Answer: B. The multimeter may blow a fuse or get damaged

12. When measuring resistance, how should the multimeter probes be connected to the resistor?

A. One probe to each end of the resistor B. Probes should not touch the resistor at all C. The probes should touch the middle of the resistor D. The probes should be connected across the power supply Answer: A. One probe to each end of the resistor

13. What is the maximum AC voltage typically measurable by most multimeters?

A. 10 V B. 100 V C. 600 V D. 1000 V Answer: C. 600 V

14. When measuring a small current (like in microamps), which setting should be used on a digital multimeter?

A. High voltage setting B. Low current (microamps) setting C. Resistance setting D. High resistance setting Answer: B. Low current (microamps) setting

15. A digital multimeter with a ‘hold’ function is useful for:

A. Freezing the display to record the measurement value B. Resetting the measurement range C. Measuring current continuously D. Changing the measurement unit automatically Answer: A. Freezing the display to record the measurement value

16. If a multimeter shows a negative reading when measuring DC voltage, what does that indicate?

A. The probes are connected correctly B. The battery is low C. The polarity of the probes is reversed D. The multimeter is faulty Answer: C. The polarity of the probes is reversed

17. When using a multimeter to measure voltage across a battery, the reading should show:

A. Zero B. A voltage equal to the battery’s rated voltage C. The current flowing through the battery D. A value much higher than the battery’s voltage Answer: B. A voltage equal to the battery’s rated voltage

18. The accuracy of a multimeter is typically expressed as:

A. Voltage B. Current C. Tolerance D. Resistance Answer: C. Tolerance

19. Which of the following is true when measuring AC voltage with a multimeter?

A. The multimeter can only measure RMS (Root Mean Square) values B. The multimeter can only measure peak voltage C. The multimeter gives instantaneous voltage values D. The multimeter cannot measure AC voltage Answer: A. The multimeter can only measure RMS (Root Mean Square) values

20. What is the typical input impedance of a digital multimeter when measuring voltage?

A. Low impedance B. Infinite impedance C. High impedance D. Variable impedance Answer: C. High impedance

These MCQs cover the usage and measurement techniques of a multimeter including set