Question

A major advantage of a "smart" grid over today's electrical grid is...

that it connects power plants via high voltage transmission lines for redundancy

that it allows for micro-grids that can share resources

that it provides backup power in the form of additional power plants

that it uses high voltage transformers to transmit power long distances

Water is being heated to increase its temperature by 50oF. Which situation requires the most heat?

Heating from 150oF to 200oF

Heating from 100oF to 150oF

Heating from 200oF to 250oF

There is no difference as it is a 50oF rise in each case

Heating from 250oF to 300oF

Answer 1

Q1) The correct answer is Ootion B

Micro-grids helps in sharing of resources and providing efficient transmission

Q2) The correct answer is Option C (Heating from 200F to 250F)

Reason: The temperature 200F corresponds to 93.33C and 250F corresponds to more than 100C. Hence the heating in this case will require the conversion of liquid water to gas, hence it requires the most amount of heat for the conversion.

Heat required = converting liquid water from 93.3C to 100C + convering liquid water into steam at 100C + converting steam at 100C to final temperature