Quantities and Units

Q1: Another name for "fundamental units" is

A base units

B atoms

C the metric system

D letter symbols

Q2: 7200 mV is the same as

A
7.2 mu.gifV

B
7.2 V

C
7,200,000 V

D
0.0072 mu.gifV

Q3: 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

Q4: Dividing 24 × 1011 by 3 × 104 equals

A
8 × 104

B
8 × 107

C
8 × 1011

D
8 × 1015

Q5: Which of the following metric prefixes could replace 10–9?

A Nano

B Mega

C Kilo

D Micro

Q6: A measure of the repeatability of a measurement of some quantity is

A error

B precision

C accuracy

D significant

Q7: 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

Q8: 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

Q9: Adding 27.5 × 103 to 8.9 × 104 equals

A
36.4 × 107

B
116.5 × 104

C
28.39 × 103

D
1.165 × 105

Q10: 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

Q11: 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

Q12: Pico is what relation to micro?

A one-tenth

B one-hundredth

C one-thousandth

D one-millionth

Q13: Add 21 mA and 8000 mu.gifA and express the result in milliamperes.

A
21.8 mA

B
218 mA

C
29 mA

D
290 mA

Q14: Which of the following is expressed in engineering notation?

A
470 × 105

B
82 × 10–2

C
9.1 × 10–6

D
14.7 × 108

Q15: The unit for frequency is the

A hertz

B ampere

C watt

D second

Q16: 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

Q17: Derived units are obtained from various combinations of

A electrical quantities

B fundamental units

C metric prefixes

D international standards


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