Showing posts with label experiments. Show all posts
Showing posts with label experiments. Show all posts

Saturday, March 3, 2012

An invited supple

Supple aka ‘supplementary paper’ is a friend, most of the engineering students carry alongwith during their course tenure. Though mechanical engg students used to have enough such friends, we Rumboys never liked them to be with us during our first three semesters. Later we became used to it and our aversion to "supple" was totally taken away by MOM-II (mechanics of machines -2) where only 7 people got passed that too with marks between 40 and 45.
Many of us, who preferred to stay out of classrooms, bunked series exams and never submitted assignments, studied hard at the time of exams to obtain good grades. KD was one such guy who never attended the classes but aspired to get good marks. For him supple was considered an insult to his manhood.
It was the electrical machines lab of fourth semester. As usual, KD could not get enough time to study all the tests and hence was forced to skip two experiments; one, load test on three phase induction motor and second, OC and SC test on transformer. Being a mathematician who scored 85+ for both S1S2 and S3 and an adept in probability theorem made some calculations and found that the chances of getting these two experiments was less than 12% and with much confident on his probability calculations, marched happily to electrical lab.
KD was the tenth candidate as per alphabetical order and was the last one in his batch. When he approached the desk, there were three folded papers lying in the table which determined his fate in the lab. He looked around and saw no one standing near the 3 phase induction motor and transformer. He was now sure that the three papers lying in front of him had the two experiments he skipped and his winning percentage dropped down to 33 % from the earlier 88%. With trembling hand he took one paper and it read “Conduct Open circuit and short circuit test on transformer and comment on its characteristics”. KD, who didn’t know the primary and secondary of transformer, earnestly asked for a change in experiment. For him, as per the probability theorem, his success percentage would raise to 50% if he is allowed to take a test from the other two.
Seeing the sad looks of our KD, the external examiner agreed for a change in experiment. KD again with trembling hands took one paper. With high expectations he read “Conduct load test on three phase induction motor and plot its….”. He couldn’t complete as his eyes got soaked with tears. Totally ditched by the probability theorems, KD moved towards the three phase induction motor and stood there staring at the motor. It was the first time he saw a three phase induction motor in his entire 20 years. KD drew a circuit diagram based on his logic by connecting a voltmeter, ammeter, load, AC source, a switch and off course a motor. He also started writing a procedure which he believed to be the procedure for conducting the load test. As he didn’t know how to conduct the experiment, he was forced to stop after wrote how to give connections as per his circuit diagram. With this our KD felt sure of getting a supple for this lab. Deeply frustrated by the thought of his first supple, he went to the examiner and confessed that he didn’t know how to do the experiment and asked her to mark him absent. As the attendance was marked and experiment being allotted, the external examiner informed her inability to mark him absent and requested him to do what best he know on the load test.
After some more time, KD again approached the external and said “Madam, this is the first time I am facing a supple. As you cannot mark me absent, please be kind enough to give me zero for this exam. For me getting a zero is better that failing”. Examiner didn’t understand KD’s logic. Still in a composed tone, she checked the circuit diagram and little bit of procedure written on the answer sheet and told KD that the answer sheet in its present form itself will fetch him 25 marks. Upon KD’s silence the external added “Please go and make the connections as drawn and try to do something and depending on how u perform in viva I will try to make you pass” KD had learnt from his past not to trust anyone from electrical dept. Be it the girl who comes in her typical black jeans on all Mondays or a faculty, everybody had equal stand in his mind.
One more appeal from KD made the examiner angry. She shouted at KD which ignited the bruised feelings inside him. Suddenly everyone in the lab saw KD snatching the answer sheet from examiner and made a glamorous ‘strike through’ on the circuit diagrams and procedure. With the entire expectation of obtaining a zero, he handed over the paper back to the external and told “Madam, now you may please give me a zero”. Seeing this the externals’ face got red and she in a very scary tone told KD “You will get zero for this answer sheet, but I will give you 15 for your record and 5 for attendance and make your marks 20”.
KD was dumbstruck. Though the external was happy on not giving his desired ‘zero’, KD was disappointed with the examiners last words. If she told about the 20 marks before, he would never score the paper and would have passed with the 25 marks he deserved for the diagram and procedure. First ditched by the probability and secondly by the examiner, KD walked out of lab, face down, into the world of supple.

Tuesday, February 28, 2012

Basic Electrical Engineering and its importance


Electrical branch was somehow close with Mechanical with regard to classes and course curriculum. But electrical girls were not that close to Mech boys. Be it the teachers or students, the feminine gender of electrical never showed any compassion to us.
A high display of this annoyance was shown during the electrical lab exams. The external teacher who came from another college demonstrated a high level of exasperation to us resulting in supple for many hardcore Rumboys during their S3. The supple exam in S4 was also not different. First day witnessed 3 “Criti” which we felt as the sign of disaster that will fall upon the supple candidates in the next two days.
Something needs to be done to postpone the Lab exams. Discussions started from Hobnob, continued in the LH steps, mess room and ended late night in Room No 407. Someone even called the ‘DC office’ of the prominent students union to enquire on the chances of calling a strike next day. Somebody contributed the wildest idea of even planting a bomb in the lab.
By this time Googly came with a great idea to generate power failure in electrical lab. All of us was thrilled by this idea and decided to throw chain or rod into the electric lines so as to blow off the fuse. But the electrical engineers who designed RIT were shrewder than us that they routed all the electric lines in RIT, underground.
We decided to call an electrical expert who could help us in blowing off a fuse outside RIT so that the KSEB authorities can only fix it. Thus the representative of S4 Electrical came as a consultant. Based on his guidance we located the Main receiving station of RIT which was at the back side of Electrical lab. Detailed plan was choked out and the time of attack was planed at 0600 hrs next day morning. Pothan, Poocha and our rep Bosh were assigned the task and five alarms were installed in their rooms to wake them up at 0545 hrs.
Morning I woke up early at 7 am and saw Pothan, Poocha and our rep Bosh walking towards hostel from the canteen side with cycle chains and iron rods in their hands. I understood from the smiling and happy face of the trio that they have accomplished the task. As they entered the hostel, they told us the numerous unsuccessful attempts of throwing the chain into the wires till the chain did its work and the street lights went off. Though satisfied, they were unhappy that the chain was reluctant to come down and it hung in the wires above their heads. Numerous attempts were made to bring the chain down but all in vein. Poocha was seen very delighted while he narrated how he climbed the ladders and brought the chain down.
We all were happy that the chain, the only evidence of our prank is now safe in our hostel and the fact that there will be no experiments to do made us even happier. Merrily we all marched to our lab much ahead of time and waited for the invigilators to conduct the viva and make us pass. But to our surprise, we saw that the papers containing title of experiments to be done were neatly arranged in the table and all the lights in the lab were ON. RIT never had a DG at that time and we were puzzled how this could happen. KSEB people, through some political contacts were asked not to come to RIT till 2 pm.
While we stood puzzled, the internal examiner said to us “There will not be any experiments in 3 phase motors and transformers as one KSEB line is at fault. You may do all experiments with single phase.”
We stood desperate