Question

which of the following applies to the coolant system? a) never open the coolant reservoir cap on a hot engine. b) coolant level should be between the min and max marks. c) coolant concentration can be checked with a coolant/battery refractometer. d) all of the above.

Explanation:

Opening the coolant reservoir cap on a hot engine can cause hot coolant to spray out due to pressure, so A is correct. The coolant level should be maintained between the MIN and MAX marks for proper engine cooling, making B correct. A coolant/battery refractometer can measure coolant concentration to ensure proper freezing - point protection and corrosion prevention, so C is correct. Since A, B, and C are all valid statements, D is the correct answer.

Answer:

D. All of the above