# Quantities and Units Mcqs

Q1. Derived units are obtained from various combinations of
A. electrical quantities
B. fundamental units
C. metric prefixes
D. international standards

Q2. 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

Q3. 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

Q3. A measure of the repeatability of a measurement of some quantity is
A.error
B.precision
C.accuracy
D.significant

Q4. Another name for “fundamental units” is
A.base units
B.atoms
C.the metric system
D.letter symbols

Q5. 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

Q6. 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

Q7. 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

Q8. The unit for frequency is the
A.hertz
B.ampere
C.watt
D.second

Q9. Add 21 mA and 8000 A and express the result in milliamperes.
A.21.8 mA
B.218 mA
C.29 mA
D.290 mA

Q10. Pico is what relation to micro?
A.one-tenth
B.one-hundredth
C.one-thousandth
D.one-millionth