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1. Resistance decreases in proportion to
diameter Resistance increases in proportion with length. What is the
resistance of a 150 feet of 12 AWG copper wire if the resistance is 1.588 ohms
per thousand feet?
2. A certain size of lumber costs $1.15 per board foot. What
is the cost of 50.5 board feet of that lumber?

1. What is the cost of 1,450 feet of BX cable if it sells
for $0.675 per foot?
2. If a truck uses 0.2 gallon per mile and diesel fuel costs
$3.159 per gallon, what does it cost to drive the truck 13,215 miles?

Pipe is made in many weights, the most common being schedule
40, schedule 80, and schedule 120. Figure 7-7 shows the inside diameters of
1-inch pipe. (“Nominal” means it is sold as 1-inch pipe although its actual
size may be different.) What is the difference in the inside diameter of 1-inch
schedule 40 pipe and 1-inch schedule 80 pipe?
Figure 7-7

According to Figure 7-7, what is the wall thickness of
1-inch schedule 80 pipe?
Figure 7-7

In Figure 7-8, each of 23 courses of siding is equally
spaced. How much of each piece of siding is showing?
Figure 7-8

1. How many pieces of 2.25-inch flooring will be required to
cover a closet floor that is 34.75 inches wide?
2. A certain size wire has a resistance of 3.65 ohms per
1,000 feet. What is the resistance of 10 feet of the wire?
3. The weight of a certain wire is 145 pounds per 1,000
feet. What is the cost of 600 feet of this wire at $1.40 per pound?

1. If 500 feet of type NM cable costs $49.65, what is the
cost of 270 feet of this cable?
2. An oil burner used 6.68 gallons of oil in 4.25 hours. How
many gallons did it use per hour?
3. A box of 12 dimmer switches costs $38.64. What is the
cost of a single switch?

1. The density of a substance is its weight divided by its
volume. If 4.5 cubic feet of R-134a refrigerant weighs 378.23 pounds, what is
its density in pounds per cubic foot?
2. If it takes 6.5 hours to install 54.75 feet of
air-conditioning duct, how much time is used to install 1 foot?

1. If a 3 1/2-inch-thick beam is covered with 3/4- inch
plywood on one side and 5/8-inch drywall on the other side, what is the total
thickness of the assembly?
2. If 3/4 gallon of paint is taken from a 5-gallon pail in
the morning and 1 3/8 gallons are taken in the afternoon, how much paint
remains in the pail?

According to the information shown in Figure 8-3, how many
hours did the carpenters work?
Figure 8-3