Arevenue tariff is designed to assist more efficient domestic producers,
whereas a protective tariff is designed to promote imports.
true
false

Both the given sentences or statements are false because protective tariff imposition main purpose is to Promote domestic goods.

Explanation:

Hence any kind of imports are discouraged by increasing the taxes and prices of goods imported. While the sentence in the question says just opposite while revenue tariff is imposed with the main purpose of generating revenue for government.

Rather than promotion of domestic Products unlike the statement given. So we can be sure about both statements being wrong.  

this is a good question! i'll do some research and come back when i have the answer!