Heating & Air Conditioning
Work Example 4

WorkKey Level: 3
NATEF Automotive Tasks: VII.C.6

According to the following chart, if I have a 14-quart capacity cooling system and I want to obtain protection against freezing down to about –54 degrees Fahrenheit, how many quarts of antifreeze should I have in the system?

Antifreeze & Coolant Means Maximum Severe Conditions Protection

Cooling System Capacity in Quarts	3	4	5	6	7	8	9	10	11
8	–7	–34	–69
9	0	21	–50	–70
10	4	–12	–34	–62
11	8	–6	–23	–47	–65
12	10	0	–15	–34	–57
13		3	–9	–25	–45	–64
14		6	–5	–18	–34	–54	–68
15		8	0	–12	–26	– 43	–62
16		10	2	–8	–19	–34	– 52	–64
17			5	–4	–14	–27	–42	–58	–69
18			7	0	–10	–21	–34	–58	–62
19			9	2	–7	–16	–28	–42	–56
20			10	4	–3	–12	–22	–34	–48

Solution:

Reading from the chart:
Go down to 14 quarts, and over to –54 degrees.
The answer is 8 quarts.