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Exam1 - ME 4005 Practice Test 1 Spring 06 1 Choose the most...

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ME 4005 Practice Test 1, Spring 06 1. Choose the most correct definition for the term precision 1. The closeness to which a measuring system indicates the actual value of the measurement 2. Ability of an instrument to follow a changing measurement 3. Ability of an instrument to give the same reading given the same measurement 4. The closeness to which an instrument tracks the measurement 5. Ability of an instrument to track a step change in measurement 2. Assume that you have a single thermocouple attached to a null potentiometer; the welded end of the thermocouple is immersed in a glass with a mix of water and yeast. You are trying to measure the temperature of the mixture. Which part of this system is the sensor-transducer stage? 1. The wires connected to the null potentiometer 2. The null potentiometer 3. The welded junction of the two wires 4. The cup, water, and yeast 3. The government lab NIST maintains standards; NIST stands for 1. National Internal Standards Technologies. 2. National Institute for Standards and Technology. 3. National Institute for Standards and Testing. 4. National Intelligence for Standards and Temperature. 4. Instrument sensitivity is 1. The y intercept of an instrument calibration curve 2. The x intercept of an instrument calibration curve 3. The slope of an instrument calibration curve 4. The error of an instrument calibration curve 5. The precision of an instrument calibration curve 5. Instrument bias error is 1. An error that increases as the measurement gets larger 2. An error that decreases as the measurement gets larger 3. An error that is random over the range of the instrument 4. An error that is constant over the range of the instrument 6. Instrument bias error is 1. An error that increases as the measurement gets larger 2. An error that decreases as the measurement gets larger 3. An error that is random over the range of the instrument 4. An error that is constant over the range of the instrument 7. Measuring voltage with a D’Arsonval movement is accomplished by 1. Inserting a small resistance in parallel with the movement
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ME 4005 Practice Test 1, Sp 06, p.2/12 2. Inserting a large resistance in parallel with the movement 3. Inserting a small resistance in series with the movement 4. Inserting a large resistance in series with the movement 8. A D’Arsonval movement transduces (measures) 1. Charge 2. Voltage 3. Current 4. Henry’s 5. Force 6. Electric field 9. Which of the circuits in Figure 1 represents a Wheatstone Bridge? The circle with an arrow through it is a D’Arsonval movement. 10. An ammeter is used to measure 1. Charge 2. Voltage 3. Current 4. Henry’s 5. Force 6. Electric field 11. Which of the circuits in Figure 1 more closely represents an ammeter? 12. The voltage across the capacitor shown in figure 2 is dt di C V . 6 idt C V . 5 dt di C 1 V . 4 idt C 1 V . 3 i C V . 2 i C 1 V . 1 = = = = = =
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ME 4005 Practice Test 1, Sp 06, p.3/12 13. A null potentiometer circuit is used to measure 1. Voltages with high current draw 2. Low currents with high voltage applied 3. Voltages with zero current draw 4.
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