HPCL Interview Questions -- on April 1st, 2011

1.  What is bore diameter of bearing ?


2.  Why to use LPG in Car ?

3.  Why do a

Rector or Exchanger have spherical/hemispherical end ?
4. Compare between Brayton and Otto cycle.

5. Define Overall Heat transfer coefficient.

6.  How hydrulic power stearing & Clutch works ?
7. How do efficiency loss work in steam turbine ?
8.  How to convert from HP to BHP or CC to Bhp ?
9.  What is the manufacturing process for impellers of closed, Semiopen and open type?
10. What is the principle of operation of simple jet propulsion system?
11. what is the relationship between cop and hp(horse power) of compressor?
12. what is the thermodynamics?
13. what is the use of vanadium (non metal) ?
14. what is unit Ps ?
15. what’s the difference between front and rear wheel drive?
16. whats the range of poissons ratio of a stable material??
17.  Whether ductile material can fail in brittle manner?
18. which engine is more suitable  petrol engine, diesel engine ?.
19 . Why Air Conditioner capacity measured in Ton ?
20. How to find rating of Chiller a.c. plant i.e. how to calculate the a.c. load of an area ?

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12:50 PM | 0 comments

Preparing for an interview

Your interview could include a technical discussion of the projects you've worked on, your future career plans or other brainteasers queries. The types of questions you'll be asked will vary depending on the position you're looking for, but all are meant to investigate your capabilities and potential to grow. Employers look for original, creative thinkers, people with a passion for what they do and the energy to make those around them better. Points to remember...

Come well rested. You will typically meet with three to six different people over the course of your interview. You want to be mentally prepared.

Dress comfortably. Wear whatever makes you comfortable in an interview.

Relax and be yourself. Natural enthusiasm and positive attitude will take you a long way to making a positive impression.

Be honest.

Be prepared for abstract questions. You will probably be asked one or two. There may be no right or wrong answer: they are usually asked to see how well you think on the spot.

Remember, an interview is an opportunity for you to get to know the employer, as well as for employer to get to know you. Relax. Ask questions. Listen. Learn. This may be the beginning of an incredible journey.

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12:49 PM | 0 comments

How do you solve train problems, ---- make it as simple as possible!!!

How do you solve train problems, and please make it as simple as possible!!!?

For example, Train A leaves a station at 40 miles per hour. Six hours later train B leaves the same station traveling in the same direction at 60 miles per hour. How long does it take for train B to catch up to train A? Answer choice [A] 14 hr [B] 13 hr [C] 16 hr [D] 12 hr

Answer

Algebra (and that's all a train problem is) is always just writing any sentance in a really quick way so you can figure out was going on.
So for your example problem train A is traveling 40mph
and train B 60mph the only other factor is train A leaves 6 hours before train B. We are looking for x (this can be any letter) which is the time when they are together.
At that time Train A will have been traveling 6 more hours the train B (that's true at any time). So if TrainB travels for x hours TrainA travels for x+6 hours.
The distance traveled when they cross will be thier traveling time multiplied by thier speed.
When they cross:
trainA will have traveled x+6 hours at 40mph
trainB will have traveled x hours at 60mph
but here's the trick thier distance travelled will be the same.
40(x+6)=60x
that's the equation we needed it links the twobits of info and has only 1 unknown.
Here's the option now you can solve
eg
40(x+6)=60x
(x+6)=1.5x (divide both sides by 40)
x+6=1.5x
6=0.5x (minus x from both sides)
12=x (double both sides)
so that means train b will over take train A 12 hours after it leaves the station.

The othe choice with multiple choice is when you 40(x+6)=60x the equation (40(x+6)=60x) just enter 13, 14, 16 and 12 and see which one holds true.

You will however need to set up the equation either way.

Good luck!

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4:15 AM | 0 comments