Quantities and Units MCQs

Question 1

Derived units are obtained from various combinations of

Accepted Answer

fundamental units

Answer

electrical quantities

Answer

metric prefixes

Answer

international standards

Question 2

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

Accepted Answer

Nano

Answer

Mega

Answer

Kilo

Answer

Micro

Question 3

Scientific notation is a method

Accepted Answer

All of the above

Answer

of expressing a very large number

Answer

of expressing a very small number

Answer

used to make calculations with large and small numbers

Question 4

If you drop a 5 when rounding a number, you are using the

Accepted Answer

round-to-even rule

Answer

significant digit rule

Answer

round-off rule

Answer

retained digit rule

Question 5

7200 mV is the same as

Accepted Answer

7.2 V

Answer

7.2 mu.gifV

Answer

7,200,000 V

Answer

0.0072 mu.gifV

Question 6

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

Accepted Answer

precision

Answer

error

Answer

accuracy

Answer

significant

Question 7

Another name for "fundamental units" is

Accepted Answer

base units

Answer

atoms

Answer

the metric system

Answer

letter symbols

Question 8

Adding 27.5 × 103 to 8.9 × 104 equals

Accepted Answer

1.165 × 105

Answer

36.4 × 107

Answer

116.5 × 104

Answer

28.39 × 103

Question 9

When using the terms "accuracy" and "precision" for measurements

Accepted Answer

"precision" measures the repeatability of a measurement

Answer

"precision" implies less measurement error than "accuracy"

Answer

"accuracy" implies less measurement error than "precision"

Answer

both terms mean the same thing