Question

1.) a radiator pressure cap:

a. decreases the coolant’s temperature.

b. increases the coolant’s flow.

c. decreases the coolant’s pressure.

d. increases the coolant’s boiling point.

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Explanation:

A radiator pressure cap works by increasing the coolant's boiling point. This is based on the principle that increasing the pressure of a liquid raises its boiling point. Option A is incorrect as the cap doesn't directly decrease coolant temperature. Option B is wrong because it doesn't increase coolant flow. Option C is incorrect as it actually increases (not decreases) coolant pressure to raise the boiling point.

Answer:

D. increases the coolant’s boiling point