एक आंतरिक दहन (IC) इंजन में यांत्रिक हानि (mechanical loss) मुख्य रूप से निम्नलिखित में से किसके कारण होती है?

The arrival of which commission in India triggered widespread protests, including mass hartals across the country in 1928?

Which of the following leaders was instrumental in initiating and leading India’s struggle for independence?