Quantities and Units Questions and Answers

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Showing 10 of 23 questions
Q1
Derived units are obtained from various combinations of
  • A electrical quantities
  • B fundamental units
  • C metric prefixes
  • D international standards
Answer: Option B
Q2
Which of the following metric prefixes could replace 10–9?
  • A Nano
  • B Mega
  • C Kilo
  • D Micro
Answer: Option A
Q3
Scientific notation is a method
  • 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
Answer: Option D
Q4
If you drop a 5 when rounding a number, you are using the
  • A round-to-even rule
  • B significant digit rule
  • C round-off rule
  • D retained digit rule
Answer: Option A
Q5
A measure of the repeatability of a measurement of some quantity is
  • A error
  • B precision
  • C accuracy
  • D significant
Answer: Option B
Q6
Another name for "fundamental units" is
  • A base units
  • B atoms
  • C the metric system
  • D letter symbols
Answer: Option A
Q7
When using the terms "accuracy" and "precision" for measurements
  • 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
Answer: Option C
Q8
The difference between scientific and engineering notation is
  • A powers of ten representation
  • B single vs. multiple digits before decimal point
  • C groupings of multiples of three digits
  • D All of the above
Answer: Option D
Q9
The number 14.8 can also be expressed as
  • A 1.48 × 10–1
  • B 1.48 × 100
  • C 1.48 × 101
  • D 1.48 × 102
Answer: Option C
Q10
The digits in a measured number that are known to be correct are called
  • A accuracy digits
  • B significant digits
  • C error digits
  • D precision digits
Answer: Option B

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