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Nalco Interview Questions
Hi Friends,
I have attended the written test of NALCO for Mechanical Enggineering on 26th of September, 2010. Overal the question paper was somewhat easy and some questions are upto the standard and needs some basic understandings of the candidate. Here i am posting some of the questions, i have remembered. The options may be different as it came in NALCO paper, the questions are like that as follows. There are 120 questions(60 Technical and 60 non-Technical including aptitude, G.K, Engg and LR) having 2 hours and 30 minutes of durations.
Technical:
1) The ratio between hoop stress and longitudinal stress is:
2
2) Maximum efficiency of screw jack having square threads and friction angle of 30 degree:
33%
3) The ratio of no.of teeth and pitch circle diameter in case of gear:
Diametrial pitch
4) If any core is required in case of wire ropes?
Yes
5) How many outermost electrons are present for semiconductor material.
Ans.4
6) Which of the following is a wrong property for austenite?
a) Ductility b)hardness c) magnetism d) none
Ans: magnetism
7) Polyester belongs to
a)Thermoplastic b) thermosetting d) PVCd) phenolics
Ans: thermosetting
8) The purpose of sprue is:
Ans: supply the molten metal from pouring basin to gate
9) For getting steel from C.I which quantity has to be controlled.
Ans: carbon
10) Airplane parts are machined by which processes? Unconventional machining.
11) Unit of power in SI system is:
Watt
12) Value of universal gravitational constant G: 6.66X10^-11
13) Emissive power of a perfect body depends on:
a)wavelength b) temperature c) nature of the body d)all
Ans: all
14) perfectly black body absorbs all incident rays falling on it.
15) The KE of molecules depends on: absolute temp
16) Absolute zero pressure can be achieve at:
Ans: when the molecular vibration among the molecule tends to negligible.
17) Equal volume of all gases weighs as much to their molecular weights,
18) Locomotive boilers are:
horizontal internally fierd, multitubular mobile boiler
Ans: All
19) Babcock Wilcox boilers having water tubes:
a) Vertical b) horizontal c) inclined d) vertical and inclined ans: inclined
20) Boilers are manufactured according to which standards
a) IBR B) ASTMC) DIN
21) Efficiency of diesel engine with increase in cut-off ratio:
a)increase b) decreases d) remains constant d) none Ans:decreases
22) In single stage centrifugal compressor, the variations as speed increases:
Ans: flow increases and efficiency decreases
23) A heat engines consumes which value of oil?
a) HCV b) LCV c) net CV d) none Ans: LCV
24) Which of the followings are not IC engines
a)steam turbine b)gas turbine c)2-stroke petrol engine d) 4-stroke petrol engine Ans: steam turbine
25) Crankcase explosion in case of IC engines occurs :First with mild followed by big explosion
26) Hydraulic accumulator consists of: a piston and a ram
27) A mould is housed in a:
a) flask b) cope c) drag d)moulding box
28) hydrogen have how many isotopes? Ans: 3
29) Drift loss in case of natural draft cooling tower?
30) âApproachâ means what in case of cooling tower
31) The purpose of true centrifugal casting is: to cast symmetrical objects about the axis
32) A basic shaft is whose upper deviation is zero.
33) The parts of a casting to be machined is coloured in red colour.
34)A continuous beam is one which has supports at more than one points.
35)A reversible machine in case of screw jack is having efficiency greater than 50%.
36) Normally steam turbine rotates at:
a) Natural frequency b) at much higher than natural frequency c) at much lower than natural frequency.
37) PCD of involutes profile gears depends upon:
a) Pressure angle b) itâs an element helps in manufacturing
c)proportional to base diameter ans: pressure angle
38) Inclined venturimeter gives:
a) same reading b) less reading c) more reading ans: same readings
39) Flow of water from nozzle:
a) Elliptical b) parabolic c) hyperbolic d) circular
Besides this there are 4 questions from nuclear power plant, 2 from hydroelectric plant and some others i have not remembered properly.
Non Technical:
1. What is the currency of China
a. Yuan b. dollar c. euro
2. What is minimum gap between tow session of parliament.
a. 3 month b. 6 month c. 12 month d non of these
3. Who got the Rajiv Gandhi khel rattan 2010
a. abhinav bindra b. saina nehwal c. vishawa Nathan
Choose the synonyms of the following.
4. PIQUANT
5. CLANDESTINE
6. OBDURATE
Find the next terms of the series
8. 5,17,37,65,â¦..,145
a. 95 b. 101 c. 107
9. 5, 1.5, 4.5, 13.5â¦
a. 40.5 Ans
10. 3, 11, 19, 35, 51, 75...
a. 91 Ans
11. P man can do a work in the day. In how many day np man do this work and times
a. time/n Ans
They given on passage with 5 Questions
One data interpretation with 3 Questions
Ten Questions from Data sufficiency like is two consecutive no. p>q
12. p+q=odd 2. p.q=even
Second part is technical in they give very simple Questions
13. Full form of MIPS
a. Million instructions per seconds
14. ~ ~A
a. A b. ~A c. 0 d. 1
15. ~A(A+1)
a.0 b .A c. ~A d. â¦â¦
16. (A+B)`
a. A`.B`ans
17. Which of the following language platform independent
a. Java
18. Which is the typical error
a syntex error b. semantic error c. run time error
19. Cache memory
Is which type of memory? a) Primary b) Secondary
20. Magnetic Flux is measured by which meter?
Ans: Flux meter
21. If diagonal of square is increased by 30% then how many % increases in area?
a) 69%
22. Which country is allow for wolf hunting after 45 years ban?
Ans: SWEDEN
23. Ellora is temple of
Ans: Buddist, Hindu, jain
24) Barcodes are read by:a)card reader b)laser c) floppy etc
Ans: card reader
25) How many deemed universities are de-recognised by the government in 2010?
Ans:44
26) Among the following cities, which one is at the highest altitude above mean sea level?
(a) Bangalore (b) Delhi(c) Jodhapur(d) Nagpur
Ans: Bangalore
Dear friends, I may be wrong with my answers, please cross check with your answer.
Thanks
Nirakar Parida
