Chapter Questions
Problems 1–12, divide the numbers.$3 \div { 6 9 }$
Problems 1–12, divide the numbers.$1 3 \div { 4 4 2 }$
Problems 1–12, divide the numbers.$1 7 1 \div { 4 , 4 4 6 }$
Problems 1–12, divide the numbers.$\div 426 \mathrm{cu} \mathrm{cm}$
Problems 1–12, divide the numbers.$4 2 \div { 1 4 , 9 5 2 }$ Btu
Problems 1–12, divide the numbers.$1 8 3 \div { 8 9 , 3 0 4 }$ amperes
Problems 1–12, divide the numbers.$86 \div 2$
Problems 1–12, divide the numbers.$918 \div 27$
Problems 1–12, divide the numbers.$21,239 \div 317$
Problems 1–12, divide the numbers.392 days $\div 7$
Problems 1–12, divide the numbers. 2,268 pounds $\div 63$
Problems 1–12, divide the numbers.245,971 cu in $\div 649$
A crate contains 4 compressors. The 4 compressors weigh 332 pounds. What is the weight of one compressor?
An apartment complex with 224 apartments is being built. Each workday, a heating and air-conditioning system can be installed in 7 apartments. How many workdays will it take to install all of the systems?
A fuel oil tank, when filled, weighs 1,900 pounds. It stands on 4 legs as shown. What weight must the floor support under each leg; that is, what is the weight each leg supports?
New tires are purchased for service trucks. Each service truck is given 4 tires and a spare. If there are 65 new tires, how many trucks will receive new tires?
This 1,800 -sq $\mathrm{ft}$ attic is to be insulated. One roll of 6 -inch thick insulation covers $40 \mathrm{sq} \mathrm{ft}$ of the attic. How many rolls are needed to insulate the entire attic?(Figure Cant Copy)
The weight of 75 pieces of 3 -foot by 8 -foot sheet metal is 600 pounds. Find the weight of one sheet.
To complete the installation of a heating system, 728 hours are needed. Each of the 7 installers works 8 hours a day. How many days will it take to complete the installation?
One hanger strap is used for the beginning of this duct. The other hanger straps are placed 5 feet apart. How many hanger straps are needed?(Figure Cant Copy)
A 3-foot by 8-foot piece of sheet metal is used to make 4-inch circular ducts. Each duct is 8 feet long. How many sheets are needed to make 224 feet of the 4-inch circular ducts?(Figure Cant Copy)
The Energy Efficiency Rating (EER) of an air-conditioning unit is defined as the ratio of the heat removed in Btu/hr divided by the energy used in watts. A window air conditioner is rated at $5,170 \mathrm{Btu}$. It uses 470 watts of power. What is this unit's EER?(Figure Cant Copy)
When $1 \mathrm{cu} \mathrm{ft}$ of natural gas is burned, 1,050 Btu of heat are produced. In one day, a building uses 761,250 Btu of heat. How many cubic feet of gas are burned?
Air flows into this room at the rate of $71 \mathrm{cu} \mathrm{ft} / \mathrm{min}$. How many minutes will it take to change the air in this room?(Figure Cant Copy)
A cylinder of R-134a contains 276 ounces of refrigerant. The cylinder is used to recharge car air conditioners. Each recharge takes 12 ounces. How many car air conditioners can be recharged from this cylinder?