Electrical Engineering MCQ Question Papers: Campus Placement

Subject: Electrical Measurement and Instruments 6

**Part 6: List for questions and answers of Electrical Measurement & Instruments**

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**Q1. A 8085 microprocessor consist of**

**a) Arithmetic and Logic Units (ALU), Control Unit (CU), Registers and Memory**

**b) Arithmetic and Logic Units (ALU), Control Unit (CU) and Registers**

**c) Arithmetic and Logic Units (ALU), Control Unit (CU), Registers and I/O devices**

**d) Arithmetic and Logic Units (ALU), Control Unit (CU) and I/O devices**

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**Q2. A voltmeter has 100 scale divisions and can measure up to 100 V. Each division can be ****read to 1/2 division The resolution of the voltmeter is**

**a) 1 V**

**b) 0.5 V**

**c) 1.5 V**

**d) 2 V**

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**Q3. The resistance of a circuit is found by measuring current flowing and the power fed into ****the circuit. If the limiting errors in the measurement of power and current are ± 1.5% and ± ****1.0% respectively, the limiting error in the measurement of resistance**

**a) ± 3.5%**

**b) ± 1%**

**c) ± 2.5%**

**d) ± 1.5%**

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**Q4. The difference between the measured value and the true value is called**

**a) Probable error**

**b) Absolute error**

**c) Gross error**

**d) Relative error**

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**Q5. The errors introduced by an instrument fall in which category ?**

**a) Systematic errors**

**b) Random errors**

**c) Gross errors**

**d) Environmental errors**

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**Q6. A 150 V moving iron voltmeter of accuracy class 1-0 reads 75 V when used in a circuit ****under standard condition. The maximum possible percentage error in the reading is**

**a) 1%**

**b) 1.5%**

**c) 2%**

**d) 2.5% **

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**Q7. The maximum percentage error in the sum of two voltage measurements when V1 = ****100V ± 1% and V2 = 80V ± 5% is**

**a) ± 4%**

**b) ± 2.8%**

**c) ± 6%**

**d) ± 3%**

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**Q8. Two meters X and Y require 40 mA and 50 mA, respectively, to give full-scale Deflection, ****then**

**a) sensitivity cannot be judged with given information**

**b) both are equally sensitive**

**c) X is more sensitive**

**d) Y is more sensitive**

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**Q9. Assertion (A) : Precision is a necessary prerequisiteof accuracy. Reason (R) : Precision ****guarantees accuracy**

**a) A is true but R is false**

**b) A is false bur R is true**

**c) Both A and R are true and R is the correct explanation of A**

**d) Both A and R are true but R is NOT the correct explanation of A**

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**Q10. An ammeter of range 0-25 A has a guaranteed accuracy of 1% of full-scale reading. The ****current measured by the ammeter is 5 A. The limiting error in the reading is**

**a) 3%**

**b) 4%**

**c) 5%**

**d) 6%**

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**Q11. For a circuit given that I = 2 ± 5 % A, R = 100 ± 0.2 % ? the limiting error in the power ****dissipation I2 R in the resistor R is**

**a) 25.2%**

**b) 1.2%**

**c) 5.2%**

**d) 10.2%**

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**Q12. A transducer measures a range of 0 – 200 N force with a resolution of 0.15 percent of ****full scale. What is the smallest change which can be measured by this transducer ?**

**a) 0.15 N**

**b) 3.33 N**

**c) 0.3 N**

**d) 6.66 N **

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**Q13. The expected value of the voltage across a resistor is 80 V, and the measured value is ****79 V. What is the percentage error and relative accuracy of the measurement ?**

**a) 1.25% ,98.75%**

**b) 1.5% ,99%**

**c) 1.25% ,98.25%**

**d) 1.5% ,98.75%**

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**Q14. A voltage of 2.70 V is being measured by an analog indicating instrument having a scale ****range of 0 – 5.0 V. If the instrument reads 2.65 V, then absolute error in measurement is**

**a) 0.01V**

**b) 0.05V**

**c) 0.01V**

**d) 0.25V**

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**Q15. A set of independent current measurements taken by four observers was recorded as : ****117.02 mA, 117.11 mA, 117.08 mA and 117.03 mA. What is the range of error ?**

**a) ± 0.045**

**b) ± 0.054**

**c) ± 0.065**

**d) ± 0.056**

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**Q16. 0-150 V voltmeter has an accuracy of 1% of full-scale reading. The voltage measured by ****the instrument is 75 V. The limiting error is**

**a) 1%**

**b) 2%**

**c) 3%**

**d) 4%**

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**Q17.A first order instrument is characterized by**

**a) Static sensitivity and damping coefficient**

**b) Time constant only**

**c) Static sensitivity and time constant**

**d) Static sensitivity, damping coefficient and natural frequency of oscillations**

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**Q18. The ratio of change in output to the change in the input is called**

**a) Precision**

**b) Resolution**

**c) Sensitivity**

**d) Repeatability **

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**Q19. The difference between the indicated value and the true value of a quantity is**

**a) Dynamic error**

**b) Gross error**

**c) Absolute error**

**d) Relative error**

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**Q20. Dynamic errors are caused by**

**a) Instrument not responding fast**

**b) Human error**

**c) Environmental error**

**d) Observational error**

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**Part 6: List for questions and answers of Electrical Measurement & Instruments**

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**Q1. Answer: b**

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**Q2. Answer: b**

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**Q3. Answer: a**

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**Q4. Answer: b**

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**Q5. Answer: a**

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**Q6. Answer: c**

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**Q7. Answer: b**

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**Q8. Answer: c**

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**Q9. Answer: a**

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**Q10. Answer: c**

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**Q11. Answer: d**

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**Q12. Answer: c**

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**Q13. Answer: a**

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**Q14. Answer: d**

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**Q15. Answer: a**

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**Q16. Answer: b**

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**Q17. Answer: b**

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**Q18. Answer: c**

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**Q19. Answer: c**

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**Q20. Answer: a**