QUES: Q: What is the main example of a DC power source?
A: Found in applications as diverse as industrial fans, blowers and pumps, machine tools, household appliances, power tools, and disk drives, electric motors can be powered by direct current (DC) sources, such as from batteries, motor vehicles or rectifiers, or by alternating current (AC) sources, such as from the power grid, inverters or generators.
Does the answer answer the question?

ANS: yes

QUES: Q: Who surpassed ASCII?
A: ASCII was the most common character encoding on the World Wide Web until December 2007, when it was surpassed by UTF-8, which is fully backward compatibe to ASCII.
Does the answer answer the question?

ANS: yes

QUES: Q: What did Isaac Asimov consider heresy as?
A: Scientist/author Isaac Asimov considered heresy as an abstraction, Asimov's views are in Forward:
Does the answer answer the question?

ANS: yes

QUES: Q: How much money did Spectre gross after four weekends in China?
A: In China, it opened on 12 November and earned $15 million on its opening day, which is the second biggest 2D single day gross for a Hollywood film behind the $18.5 million opening day of Mission: Impossible Rogue Nation and occupying 43% of all available screens which included $790,000 in advance night screenings.
Does the answer answer the question?

ANS:
no