question: fluke 1740 series power quality loggers (.pdf)"
Capitalize this past sentence correctly.
A: Fluke 1740 Series Power Quality Loggers (.pdf)"

question: the surprising thing is that there is quite limited variations in grammatical structures.
Capitalize this past sentence correctly.
A: The surprising thing is that there is quite limited variations in grammatical structures.

question: a category 5 hurricane with winds of 170 mph would have a rate of destructive power almost 80 percent greater than that of a category 4 hurricane with wind speeds of 140 mph.
Capitalize this past sentence correctly.
A: A category 5 hurricane with winds of 170 mph would have a rate of destructive power almost 80 percent greater than that of a category 4 hurricane with wind speeds of 140 mph.