question: How are 12 v relays used to switch a high voltage battery on and off?
Why do Indian roads have lot of dust while foreign roads are dust free?

answer: no

question: How do I become a concert pianist?
What does it take to be a concert pianist?

answer: yes

question: What are the best colleges for Aerospace engineering in India?
What are some of the best colleges in India for aerospace engineering?

answer:
yes