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| This bunch is for those who had a nightmare during their Engineering Vivas . They bring back fond memories for those who care to smile at the past ... ********************************************************** 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. -------------- 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: How will you reverse direction of an induction motor? Candidate: I will remove the four bolts at the base, 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) -------------- Interviewer: How do you limit surge current within an integrated circuit? Candidate: By using a miniature circuit breaker. -------------- 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!" -------------- 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 transfomer that is put in the basement 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!" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Sardar in Texas A patrol car has been following this vehicle for about 30 minutes now, when they finally decide to pull it over. The officer steps out and walks up to the surd's window. "Goodafternoon, sir." "Good afternoon, any problems?" "No sir. My partner and I have been following and observing you for a half an hour now. We ascertained that you have not committed one single traffic violation, you have not gone over the speed limit by even 1 mph, you were courteous towards the fellow drivers on the road. Therefore, as a part of our new "Solid Driving Awareness Program", I would like to present you with this check for $30,000.00." The surd lets out a big sigh of relief:"Oh good! Now I can finally pay to get my driver's license."Awkward silence, then the surd's wife sitting in the passenger seat goes, "Don't listen to him, officer. He always talks nonsense when he has been drinking." Surd's Grandma, who's a little hard of hearing, adds from the backseat,"Aye, aye aye, didn't I tell you not to go in a stolen car?" At this time the surd's trunk pops open and a head peeks out, "Are we overthe border yet?" |
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