Is it correct that the questions of chapters of textbook are always asked in present tense but the answer should always be in past tense.

No, you should answer depending on the tense in the question. It may be in present or past. 

Example - Did you have dinner?
No, we did not have our dinner. Yes we had our dinner.

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it depends on the subject as well as the type of questuion
​for example
english questions are in past tense
​and physics is neutral
so it depends

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