Category: Writing

A manufacturer recommends one lighting fixture for every 80
square feet of ceiling area. In a room with a suspended ceiling, 4 tiles wide
by 15 tiles long, how many fixtures should be installed? (Each tile is 8 square
feet.) 68. If you cut 13 pieces, each 40 inches long, from a supply of 5 pieces
of lumber, each 120 inches long, how much lumber remains?

A cylinder of refrigerant weighs 24 pounds 4 ounces. If you
use 28 ounces to charge a system, what is the weight of the cylinder when you
finish charging? (Hint: Change the pounds and ounces to ounces. There are 16
ounces in a pound.)

The electrical code requires that no point on a wall can be
more than 6 feet from an electric outlet. How many electric outlets are
required for the rooms, as shown in Figure 6-7? Do not allow for wall
thickness. (Hint: Receptacles are required to be placed within 6 feet of each
doorway. Receptacles can be spaced 12 feet apart on a continuous wall run)
Figure 6-7

1. A contractor hired three plumbers to work nine hours per
day for five days and two laborers to work seven hours for one day. What was the
total number of hours worked?
2. How many bundles of shingles are needed to cover a
two-part roof if one part is 400 square feet and the other part is 600 square
feet? It takes three bundles of shingles to cover 100 square feet.

1. A lighting circuit can supply 1,200 watts of incandescent
light. How many 150-watt fixtures can it support?
2. A carpenter cuts four pieces of weather stripping from a
roll 180 inches long. How much weather stripping remains on the roll if the
pieces were 40 inches, 40 inches, 34 inches, and 34 inches long?

1. How many fixtures requiring 4 LED lamps each can be
supplied from a case of 24 LED lamps?
2. How many 4-foot pieces can be cut from a 12- foot 2 × 4?
3. If one person can apply 300 square feet of insulation per
hour, how long will it take that person to apply 3,300 square feet of
insulation?

1. What is the total length of 24 pieces of door casing if
each piece is 7 feet long?
2. If you work 37 hours at $12 per hour, what should your
pay be?
3. If you need to make electrical connections in 27 boxes
and each box requires 3 wire nuts, how many wire nuts do you need?

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

Find missing dimension A in Figure 6-4.