Quantities and Units problems
- 1. If you drop a 5 when rounding a number, you are using the
Options- A. round-to-even rule
- B. significant digit rule
- C. round-off rule
- D. retained digit rule Discuss
Correct Answer: round-to-even rule
- 2. Another name for "fundamental units" is
Options- A. base units
- B. atoms
- C. the metric system
- D. letter symbols Discuss
Correct Answer: base units
- 3. Pico is what relation to micro?
Options- A. one-tenth
- B. one-hundredth
- C. one-thousandth
- D. one-millionth Discuss
Correct Answer: one-millionth
- 4. Dividing 24 × 1011 by 3 × 104 equals
Options- A. 8 × 104
- B. 8 × 107
- C. 8 × 1011
- D. 8 × 1015 Discuss
Correct Answer: 8 × 107
- 5. Which of the following is expressed in engineering notation?
Options- A. 470 × 105
- B. 82 × 10?2
- C. 9.1 × 10?6
- D. 14.7 × 108 Discuss
Correct Answer: 9.1 × 10?6
- 6. A measure of the repeatability of a measurement of some quantity is
Options- A. error
- B. precision
- C. accuracy
- D. significant Discuss
Correct Answer: precision
- 7. When using the terms "accuracy" and "precision" for measurements
Options- A. "precision" implies less measurement error than "accuracy"
- B. "accuracy" implies less measurement error than "precision"
- C. "precision" measures the repeatability of a measurement
- D. both terms mean the same thing Discuss
Correct Answer: "precision" measures the repeatability of a measurement
- 8. The number 14.8 can also be expressed as
Options- A. 1.48 × 10?1
- B. 1.48 × 100
- C. 1.48 × 101
- D. 1.48 × 102 Discuss
Correct Answer: 1.48 × 101
- 9. Scientific notation is a method
Options- A. of expressing a very large number
- B. of expressing a very small number
- C. used to make calculations with large and small numbers
- D. All of the above Discuss
Correct Answer: All of the above
- 10. The digits in a measured number that are known to be correct are called
Options- A. accuracy digits
- B. significant digits
- C. error digits
- D. precision digits Discuss
Correct Answer: significant digits
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