Best answer by B.E students during viva..............

SehaJ

Troublemaker
Interviewer: Why is a thicker conductor necessary to carry a current in A.C.as compared to D.C. ?
Candidate:
An AC current goes up and down (drawing a sinusoid) and requires more space inside the wire, so the wire has to be thicker.
External
(to student ) : "Why does a capacitor block DC but allow AC To pass through ?
Student:
See, a capacitor is like this ---| |--- , OK. DC comes straight, like this ---------- , and the capacitor stops it. But AC,goes UP, DOWN, UP DOWN and jumps right over the capacitor!" .-------------------good one

Interviewer:
How will you tell if that wall outlet carries AC or DC?
Candidate:
I will put my finger in. If it is pushed away, it is AC. If it gets stuck, it was DC.
Interviewer: H! ow will you reverse direction of an Induction motor?
Candidate:
I will remove the four bolts at the x-ud, turn the motor around, and put back the bolts.
Interviewer:
How do you start a synchronous motor?
Candidate:
Vrrrrrrrmmmmmmmmmmmmmmmmmmm (in rising pitch)
Interviewer:
Stop! Stop!
Candidate:
rrrrrrrmmmmmmmmmmmmmmmmmmmm (in falling pitch)
Examiner:
"What is a step-up transformer?"
Student:
"A transformer that is put on top of electric poles."
Examiner (smiling):
"And then what is a step-down transformer?"
Student (hesitantly):"
Uh - A transformer that is put in the x-udment or in a pit?"
Examiner (pouncing):
"Then what do you call a transformer that is installed on the ground?"
(
Student knows he is caught-can't answer)
Examiner (impatiently):
"Well?"
Student (triumphantly):
"A stepless transformer, sir!"

TOP FACTS ABOUT ENGINEERS

Engineers at work:

Assignme! nts solved by one and then carry out mass transfer operations throughout the class

The most important machine for Engineers:
Xerox Machine (Without which assignment Completion couldn't be possible)

Top two Engineering Rumours:
Did you hear the results are being put up today at 5:30pm'
'Did you hear the exams are postponed by two weeks

Common Engineering Dialogues after a paper:
'What is this man, 60% o
f the paper was out of the syllabus'
'This was the worst paper set in the entire
engineering history' 'I am failing'
 
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