CSSGB Practice Test 5

10 free CSSGB practice questions in the real exam format, covering the official content areas, with an explanation for every answer.

CSSGB Practice Test 5Tutor mode

Question 1 of 10

Improve Phase

The table shows a replicated 2² experiment on batch yield in a chemical reactor (coded −1/+1). What is the main effect of reaction temperature (A) on yield?

2² run matrix — batch yield (%)
Run	A: temperature	B: catalyst	Yield, rep 1	Yield, rep 2
1	−1	−1	60	62
2	+1	−1	72	70
3	−1	+1	64	66
4	+1	+1	84	86