Job Information Level 2: Lesson 6 Using the Metric System and Metrication Changes Flashcards
The metric system is based on the ? , which is the primary unit of length.
Select one:
a.
centimeter
b.
inch
c.
kilometer
d.
meter
meter
The simplicity of the metric system lies in the relationship of the expression of quantity (how much) based on the number ? .
Select one:
a.
0.1
b.
2
c.
10
d.
100
10
The decimal system of numbers is based on the number ? .
Select one:
a.
one hundred
b.
ten
c.
two
d.
zero
Ten
The prefix deci means ? .
Select one:
a.
100
b.
tenth
c.
none of the above
Tenth
The deciliter is a unit of measure of ? .
Select one:
a.
area
b.
area2
c.
capacity
d.
weight
Capacity
Which one of the following is not one of the five major units of metric measure discussed in this lesson?
Select one:
a.
Cubic meter
b.
Foot
c.
Gram
d.
Liter
e.
Meter
f.
Square meter
Foot
Change the following as indicated and match with the correct answers shown below.
I. 0.001
II. 0.003
III. 0.0003
IV. 1.2
V. 12.0
VI. 5
VII. 50
VIII. 1,000
300 picofarads = microfarads
0.005 watts = milliwatts
1,200 millivolts = volts
1 kilovolt = volts
iii, vi, iv, viii
How many meters are there in 35.4 decimeters? Match with the correct answer below.
Select one:
a.
0.354 m
b.
3.54 m
c.
354 m
d.
None of the above
3.54 m
Match the following.
I. 1/1,000
II. 100
III. 10,000
IV. 0.1
V. 10
VI. 1,000
VII. none of these
kilo =
milli =
deka =
deci =
VI, I, V, IV
To express measurements in the metric system, a person selects the proper prefix and writes it ? the word that represents the unit of measure.
Select one:
a.
after
b.
before
Before
A junction box with a screw cover measures 24” × 24” × 8”. Express these dimensions in millimeters, centimeters and meters. (Suggestion: Convert first to millimeters and then shift the decimal point for others.) Match with the correct answers shown below.
I. 0.06096 m × 0.06096 m × 0.02032 m
II. 0.6096 m × 0.6096 m × 0.2032 m
III. 60.96 mm × 60.96 mm × 20.32 mm
IV. 60.96 cm × 60.96 cm × 20.32 cm
V. 609.6 cm × 609.6 cm × 203.2 cm
VI. 609.6 mm × 609.6 mm × 203.2 mm
__mm
__cm
__m
VI, IV,II
1 inch = 2.54cm
The first floor elevation of a building is 76.38 feet above sea level. How many centimeters is it above sea level?
Select one:
a.
23.2806 cm
b.
232.806 cm
c.
2,328.06 cm
d.
23,280.6 cm
2,328.06 cm
1 inch = 2.54cm
12 inches = 1 foot
Convert 42,291.4 centimeters to meters.
Select one:
a.
4.291 meters
b.
42.914 meters
c.
422.914 meters
d.
4,229.14 meters
422.914
There are two radii for a curved window wall. They are 40 feet 7 3/4 inches and 104 feet 11 1/8 inches. Express these dimensions in meters. Match with the correct answers shown below.
I. 12.19200
II. 12.38885
III. 14.16050
IV. 31.699200
V. 31.981775
40’ 7 3/4” = m
104’ 11 1/8” = m
II, V
An auditorium is to seat 2,400 people. The building code requires three square feet for each person. How many square meters will that auditorium have?
Select one:
a.
6.6888 square meters
b.
66.888 square meters
c.
668.88 square meters
d.
6,688.8 square meters
668.88
A 250-kVA, three-phase, 480-volt transformer requires 75 gallons of insulating oil to keep it properly cooled. How many liters is this?
Select one:
a.
28.3875 liters
b.
283.875 liters
c.
2,838.75 liters
d.
28,387.5 liters
283.875 Liters
1 gal = 4.54 L
The transformer in Question 16 weighs 1,275 kilograms. Approximately how many pounds would this be?
Select one:
a.
281.0865 pounds
b.
2,810.865 pounds
c.
3,626.565 pounds
d.
28,108.65 pounds
2,810.865 pounds
In the NEC, Chapter 9–Table 4 has to do with Dimensions and Percent Area of Electrical Metallic Tubing. Give the metric equivalent in millimeters of the internal diameter for each of the following trade sizes, and match with the correct answers shown below.
I. 15.799 mm
II. 20.995 mm
III. 26.645 mm
IV. 35.052 mm
V. 40.894 mm
VI. 52.502 mm
VII. 69.367 mm
VIII. 85.242 mm
IX. 97.384 mm
X. 110.083 mm
1/2 “ =
1” =
1 1/2” =
2” =
3” =
4” =
I, III, V, VI, VIII, X
As per Presidential Executive Order 12770, what was mandated as of September 30, 1992?
Select one:
a.
Every new federal construction project must be developed using both standard and metric measurements.
b.
Every new federal construction project must be developed using IEC measurements.
c.
Every new federal construction project must be developed using metric measurements.
d.
Every new federal construction project must be developed using NEMA measurements.
Every new federal construction project must be developed using metric measurements.
The metric system based on decimals was developed by ? scientists.
Select one:
a.
Arabian
b.
Chinese
c.
English
d.
French
French
SI in the metric system stands for ? .
Select one:
a.
Structure InterContinental
b.
Structure International
c.
System InterContinental
d.
System International
System International
Ambient temperatures used in Article 310 of the NEC are expressed in Fahrenheit and Celsius. Convert the following temperatures to the indicated units of measurement. Match with the correct answers shown below.
I. 30.1
II. 32.2
III. 40.0
IV. 60.0
V. 100.0
VI. 176.6
VII. 212.0
VIII. 250.0
IX. 413.6
X. 899.6
140°F = °C
428 F= °C
90°F = °C
212°C = °F
100°C = °F
482°C = °F
IV, VIII, II, IX, VII, X
F = 9/5C +32
C= 5/9(F-32)
What effect will metrication have on America’s global competitiveness?
Select one:
a.
Metrication will have a negative effect.
b.
Metrication will have a positive effect.
c.
Metrication will not change America’s global competitiveness.
d.
Metrication will not allow American products to be accepted and used everywhere in the world.
Metrication will have a positive effect.
