Test Bank For Practical Problems in Mathematics for Heating and Cooling Technicians
Unit 1 Addition of Whole Numbers
Unit 1 Addition of Whole Numbers
1. When adding whole numbers, line the units places of each number
underneath each other.
*a. True
b. False
2. In the number 3,567,890, the digit 9 is in the hundreds place.
a. True
*b. False
3. Add the following numbers to obtain the correct sum.
983 + 351 =
Correct Answer(s):
a. 1,334
4. Add the following numbers to obtain the correct sum.
2,377 + 512 + 1,893 + 384 =
Correct Answer(s):
a. 5,166
5. Add the following numbers to obtain the correct sum:
8,519
2,221
654
+ 9
Correct Answer(s):
a. 11,403
6. Add the following numbers to obtain the correct sum:
678 meters
496 meters
332 meters
+17 meters
Correct Answer(s):
a. 1,523 meters
1
,Test Bank For Practical Problems in Mathematics for Heating and Cooling Technicians
Unit 1 Addition of Whole Numbers
7. If one technician earns $21 per hour and a second technician earns $18 per hour, what
are the total hourly labor costs for both workers?
Correct Answer(s):
a. $39
8. In one month, a technician woks 37 hours, 41 hours, 39 hours, and 43 hours. What is
the total number of hours the technician works?
Correct Answer(s):
a. 160
9. An air-conditioning shop orders the following amounts of refrigerant: 115 pounds of
R-134a, 157 pounds of R-125, 65 pounds of R-124, 95 pounds of R-32, and 90 pounds of
R-152a. What is the total weight in pounds of refrigerant ordered?
Correct Answer(s):
a. 522
10. In one year, the Hudson Refrigerator Company’s five repair trucks covered 8,107
miles; 6,977 miles; 5,487 miles; 6,003 miles; and 7,201 miles. What is the total mileage
the Hudson Refrigerator Company recorded for the year?
Correct Answer(s):
a. 33,775
2
,Test Bank For Practical Problems in Mathematics for Heating and Cooling
Technicians
Unit_2__Subtraction_of_Whole_Numbers
Unit_2__Subtraction_of_Whole_Numbers
1. In a two digit whole number the second column from the right in the
number represents units.
a. True
*b. False
2. When subtracting two numbers it is sometimes necessary to
borrow from the number in the adjacent column.
*a. True
b. False
3. Subtract the following numbers to obtain the difference:
538 – 42 =
Correct Answer(s):
a. 496
4. Subtract the following numbers to obtain the difference:
3,972 – 1,028 =
Correct Answer(s):
a. 2,944
5. Subtract the following numbers to obtain the difference:
4,250 feet
- 975 feet
Correct Answer(s):
a. 3,275 feet
6. Two rooms needs 42 feet of electric baseboard heaters. Lengths of 9 feet, 8 feet, 7
feet, and 7 feet are already placed. What length of baseboard heater in feet still must be
placed?
Correct Answer(s):
a. 11
7. A cylinder containing refrigerant R-134a weighs 28 pounds. When empty, the
cylinder weighs 6 pounds. How many pounds of R-134a are in the cylinder?
3
, Test Bank For Practical Problems in Mathematics for Heating and Cooling
Technicians
Unit_2__Subtraction_of_Whole_Numbers
Correct Answer(s):
a. 22
8. An installer has 109 strap hangers in the truck. On a job, 45 straps are used on hot
water supply lines and 33 on return lines. The installer also uses 12 straps on an electrical
conduit that carries wires to the furnace. Find the number of straps that are left in the
truck.
Correct Answer(s):
a. 19
9. A full oil tank holds 290 gallons of #2 fuel oil. During 5 months, the amounts of fuel
oil used are: 8 gallons, 24 gallons, 32 gallons, 91 gallons, and 105 gallons. How many
gallons of fuel oil are left in the tank?
Correct Answer(s):
a. 30
10. A house has 3,450 sq ft of floor space and is divided into 3 heating/cooling zones.
The first zone, the upstairs, has 1,122 sq ft. The main living area is the second zone
covering 1,525 sq ft of space. The third zone is the basement where the recreation room,
laundry, half bath, and home shop are located. How much floor space is included in the
third zone in square feet?
Correct Answer(s):
a. 803
4
Unit 1 Addition of Whole Numbers
Unit 1 Addition of Whole Numbers
1. When adding whole numbers, line the units places of each number
underneath each other.
*a. True
b. False
2. In the number 3,567,890, the digit 9 is in the hundreds place.
a. True
*b. False
3. Add the following numbers to obtain the correct sum.
983 + 351 =
Correct Answer(s):
a. 1,334
4. Add the following numbers to obtain the correct sum.
2,377 + 512 + 1,893 + 384 =
Correct Answer(s):
a. 5,166
5. Add the following numbers to obtain the correct sum:
8,519
2,221
654
+ 9
Correct Answer(s):
a. 11,403
6. Add the following numbers to obtain the correct sum:
678 meters
496 meters
332 meters
+17 meters
Correct Answer(s):
a. 1,523 meters
1
,Test Bank For Practical Problems in Mathematics for Heating and Cooling Technicians
Unit 1 Addition of Whole Numbers
7. If one technician earns $21 per hour and a second technician earns $18 per hour, what
are the total hourly labor costs for both workers?
Correct Answer(s):
a. $39
8. In one month, a technician woks 37 hours, 41 hours, 39 hours, and 43 hours. What is
the total number of hours the technician works?
Correct Answer(s):
a. 160
9. An air-conditioning shop orders the following amounts of refrigerant: 115 pounds of
R-134a, 157 pounds of R-125, 65 pounds of R-124, 95 pounds of R-32, and 90 pounds of
R-152a. What is the total weight in pounds of refrigerant ordered?
Correct Answer(s):
a. 522
10. In one year, the Hudson Refrigerator Company’s five repair trucks covered 8,107
miles; 6,977 miles; 5,487 miles; 6,003 miles; and 7,201 miles. What is the total mileage
the Hudson Refrigerator Company recorded for the year?
Correct Answer(s):
a. 33,775
2
,Test Bank For Practical Problems in Mathematics for Heating and Cooling
Technicians
Unit_2__Subtraction_of_Whole_Numbers
Unit_2__Subtraction_of_Whole_Numbers
1. In a two digit whole number the second column from the right in the
number represents units.
a. True
*b. False
2. When subtracting two numbers it is sometimes necessary to
borrow from the number in the adjacent column.
*a. True
b. False
3. Subtract the following numbers to obtain the difference:
538 – 42 =
Correct Answer(s):
a. 496
4. Subtract the following numbers to obtain the difference:
3,972 – 1,028 =
Correct Answer(s):
a. 2,944
5. Subtract the following numbers to obtain the difference:
4,250 feet
- 975 feet
Correct Answer(s):
a. 3,275 feet
6. Two rooms needs 42 feet of electric baseboard heaters. Lengths of 9 feet, 8 feet, 7
feet, and 7 feet are already placed. What length of baseboard heater in feet still must be
placed?
Correct Answer(s):
a. 11
7. A cylinder containing refrigerant R-134a weighs 28 pounds. When empty, the
cylinder weighs 6 pounds. How many pounds of R-134a are in the cylinder?
3
, Test Bank For Practical Problems in Mathematics for Heating and Cooling
Technicians
Unit_2__Subtraction_of_Whole_Numbers
Correct Answer(s):
a. 22
8. An installer has 109 strap hangers in the truck. On a job, 45 straps are used on hot
water supply lines and 33 on return lines. The installer also uses 12 straps on an electrical
conduit that carries wires to the furnace. Find the number of straps that are left in the
truck.
Correct Answer(s):
a. 19
9. A full oil tank holds 290 gallons of #2 fuel oil. During 5 months, the amounts of fuel
oil used are: 8 gallons, 24 gallons, 32 gallons, 91 gallons, and 105 gallons. How many
gallons of fuel oil are left in the tank?
Correct Answer(s):
a. 30
10. A house has 3,450 sq ft of floor space and is divided into 3 heating/cooling zones.
The first zone, the upstairs, has 1,122 sq ft. The main living area is the second zone
covering 1,525 sq ft of space. The third zone is the basement where the recreation room,
laundry, half bath, and home shop are located. How much floor space is included in the
third zone in square feet?
Correct Answer(s):
a. 803
4
