Question paper for HPCL Officer Trainee Chemical Engineering

I need Hindustan Petroleum Corporation Limited Officer Trainee Chemical Engineering question paper, will you please provide here?

[Arun Vats]

Here are Hindustan Petroleum Corporation Limited Officer Trainee Chemical Engineering exam questions:

Aptitude
1) A farmer used 1034 acres of land for growing rice, wheat and corn in the ratio of 5:2:4 respectively. How many acres
were used for growing corn?
A) 188 acres B) 258 acres C) 376 acres D) 470 acres

2) How many times should the keys of a keyboard be pressed in order to type the first 300 counting numbers? (i.e. to
type 1, 2, 3 ... 300)
A) 362 B) 1448 C) 1504 D) 792

3) The more she learnt _______ the American Civil War, the more fascinated she became.
A) About B) From C) Off D) With

Chemical Engineering

4) The specific reaction rate constant of a first order reaction k = 0.01. What is the time required for 60% conversion in
a batch reactor?
[Note: ln 0.4 = - 0.67]
A) 37 minutes B) 47 minutes C) 57 minutes D) 67 minutes

5) A cold fluid flowing on inner pipe of a DPHE is heated from 32.5 to 750C by steam condensing on the outer pipe at
1000C. What is Log Mean Temperature Difference, LMTD?
[Note: ln 2.7 = 1]
A) 52.50C B) 42.50C C) 32.50C D) 67.50C

6) Pillows and mattresses belong to which category of plastics/ polymers?
A) Foamed plastics
B) Thermosetting plastics
C) Synthetic polymers
D) Ladder polymers

I need HPCL Officer Trainee Chemical Engineering question paper urgently. Will any one share the question paper of the HPCL Officer Trainee Chemical Engineering exam with me?

[Kiran Chandar]

As per your request, I am giving you question paper for the HPCL Officer Trainee Chemical Engineering exam. Hope it works for you.

1. For the flow of a fluid at right angles to a circular cylinder, the average heat transfer coefficient around the periphery is given by Nu = a + b Rem Prn, where , Nu is Nusselt Number, Sh is Sherwood Number, Pr is Prandtl Number, Sc is Schmidt Number and a, b, m, n are constatns. The anglogous expression for the mass transfer can be expressed as

(a) Sh = a + b Rem SCn

(b) Sh = b + a Rem Scn

(c) Nu = m + n Ren Scb

(d) Nu = n + m Ren Scv



Statement for linked answer - question 12 and 13 :
A horizontal spray chamber with recirulated water is used for abiabatic humidification and cooling of air. Air with humidity of 0.01 kg water per kg of dry air is entering the unit with a flow rate rate of 2 kg/m2 = s. The humidity f exit stream is 0.02 kg water per kg of dry air. The active part of the chamber is 1.0 m long. The humidity at the saturated condition is 0.03 kg water per kg of dry air.



2. The volumetric gas phase mass transfer coefficient in kg/m3. s in the operation is equal to

(a) In 2

(b) In 3

(c) In 4

(d) In 5



3. If a duplicate spray chamber operating in the same manner were to be added in series with the existing chamber, the expected humidity of the outlet air in kg water per kg of dry air is equal to

(a) 0.03

(b) 0.02

(c) 0.025

(d) 0.05



4. A saturated liquid mixture with 50% (mole basis) of more volatile component is to be separated in a continuous distillation column. The mole% of more volatile component in the distillate is 90. The constant relative volatility of more volatile component is 1.5. Assuming McCabe-Thiele method, the minimum reflux ratio for this operation is

(a) 3

(b) 2

(c) 2.5

(d) 1



5. In a perfectly mixed flow model, the ratio of the Murphree plate efficiency to the point efficiency is equal to

(a) 0

(b) 1

(c) < 1

(d) > 1



Statement for linked answer - question 16 and 17 : A waste stream of organic vapor in a gas from a process was adsorbed by solid particles in packed bed of length 20 cm. The breakpoint concentration is set as C/C0 = 0.10 and the breakpoint time is 4 hours.



6. What will be the time equivalent to the unusable capacity of the bed up to the breakpoint time ?

(a) 3 hours

(b) 1.5 hours

(c) 4 hours

(d) 3.6 hours



7. The stoichiometric capacity of the bed is 7.2 hours. What will be the length of unused bed for this operation ?

(a) 7.2 cm

(b) 20 cm

(c) 10 cm

(d) 4 cm



8. In liquid-liquid extraction, the solvent B is used to separte solute C from a given solution of A and C. If A and B are completely insoluble in one another, the selectivity of B will be

(a) ¥

(b) 0

(c) <0

(d) 1



9. A batch of wet solid is to be dried from 80% to 50% moisture (wet basis). The drying surface is 1 m2/10 kg of dried solid. The drying takes place within the constant rate period. The constant flux of drying is 0.3 x 10-3 kg/m2. s. The drying time is

(a) 102 s

(b) 103 s

(c) 104 s

(d) 105 s



10. A gas with a flow rate of 25 mol/m2. s is scrubbed by a pure liquid to remove a component in a counter-current packed bed column. The specific interfacial area of the packing material is 1 m-1. The individual gas-film mass transfer coefficient is 25 mol/m2. s. If the overall mass transfer resistance is 50% of the individual gas-film mass transfer resistance, the overall height of gas phase transfer unit (HTU)og is

(a) 0.5 m

(b) 1.0 m

(c) 2.0 m

(d) 2.5 m



11. If L is the liquid flow rate. G is the gas flow rate and m is the slope of the equilibrium line, the absorption factor is

(a) mL/G

(b) G/mL

(c) L/mG

(d) LG/m



12. A vessel dispersion number of zero indicates

(a) plug flow behavior

(b) mixed flow behavior

(c) batch reactor behavior

(d) both b and c



13. For the E curve shown below, the shaded region represents

(a) fraction of inlet stream older than time t1

(b) fraction of exit stream younger than time t1

(c) fraction of exit stream older than time t1

(d) fraction of inlet stream younger than time t1



14. A first order reaction take place in a single cylindrical pore having strong diffusion resistance. For a particle size (R), the rate of the reaction varies

(a) directly with R

(b) directly with √R

(c) inversely with √R

(d) inversely with R



15. The response curve for a step input signal from a reactor is called C curve. The variance of C curve in a 'tank in series model' comprising of 'n' tanks is

(a) n

(b) 1/n

(c) n0.5

(d) n2



16. Calculate the weight of the catalyst required for the 75% conversion of sample A (CAO = 8 mol/m3) in a mixed flow reactor at a flow of 1000 mole/min. (The weight time of the operation is 4.15 kg s/m3)

(a) 500 kg

(b) 519 kg

(c) 525 kg

(d) 600 kg



17. In an endothermic reaction for an increase in temperature, the equilibrium conversion

(a) rise

(b) falls

(c) remains constant

(d) first increases than decreases



Statement for linked answer - question 18 and 19 : Aqueous phase decomposition of A is investigated in two mixed flow reactors in series. The second reactor is having twice the volume of the firs reactor. At steady state with a feed of 1 mole/litre and mean residence time of 96 seconds in first reactor, the concentration of A in the first reactor is 0.5 mol/litre and in the second 0.25 mol/litre.



18. The order of the reaction is

(a) 1

(b) 2

(c) 0

(d) 3



19. The rate constant (lit/mol-min) is

(a) 1.5

(b) 3

(c) 2

(d) 1.25



20. For a zero order reaction in a varying volume batch reactor, the correct equation is

(a) CAo/eA In (V/Vo) = kt

(b) eA/CAo In (Vo/V) = kt

(c) eA/CAo In (V/Vo) = kt

(d) 1/eA.CAo In (V/Vo) = kt>



21. The following figure shows the temperature dependency on the reaction rate for two sets of reactions I and II. Choose the INCORRECT statement.

(a) Reaction I is temperature sensitive

(b) Reactions I and II represent high and low activation energies respectively

(c) Reactions I and II represent low and high activation energies respectively

(d) Reactions II is temperature sensitive



22. For a particular reaction where order of the reaction is less than one, the CORRECT sequence of reactors for efficient use is

(a) Small MFR, Large MFR, PFR

(b) Large MFR, Small MFR, PFR

(c) PFR, Large MFR, Small MFR

(d) PFR, Small MFR, Large MFR



23. A half-life period of the reaction A → products, is independent of the initial concentration of the reactant A, if the order of the reaction is

(a) 0

(b) 1

(c) 2

(d) 1/2



Statement for linked answer - question and :
Chemical A reacts to form R (k1 = 8 hr-1) and chemical R reacts to form S (k2 = 8 hr-1). In addition R slowly decomposes to form T (k3 = 1 hr-1). A solution containing 1 mol/llitre of A is introduced into a batch reactor.



24. What is the maximum concentration of R (mol/lit)?

(a) 0.5

(b) 0.25

(c) 0.75

(d) 1.0



25. How long will it take (in hours) for R to reach its maximum concentration ?

(a) In 2

(b) 1/2 In 2

(c) 3 In 2

(d) 2 In 2



26. Ordinary mercury-in-glass thermometer (without any convering or air gap) is an example of

(a) zero-order system

(b) first-order system

(c) second-order system

(d) third-order system



27. The symbol of the type ............. denotes

(a) Pneumatic line

(b) Fluid pressure line

(c) Electrical line

(d) Software link



28. The Laplace transform of sin (kt) is

(a) k/(s2 + k2)

(b) s/(s2 + k2)

(c) k/(s2 - k2)

(d) s/(s2 - k2)



29. A control system in unstable if the open loop frequency response exhibits an amplitude ratio exceeding unity at the cross-over frequency. This is

(a) Bode stability criteria

(b) Routh stability criteria

(c) Nyquist criteria

(d) Root-locus criteria



30. What will be the maximum value of K such that a closed loop system having the following characteristics equation is stable ?

s3 + 6s2 + 11s + 6(1 + KC) = 0

(a) KC < 10

(b) KC < 15

(c) KC < 20

(d) KC < 25



31. The transfer function of a proportional-integral-derivative (PID)

(a) = KC (1 + tD S + tD S)

(b) = KC + tD + tD S

(c) = KC

(d) = td



32. For the block diagram shown below what will be the overall transfer function for the change in set point (U = 0) ?

(a)

(b)

(c)

(d)



33. The amplitude ratio (AR) for the sinusoidal response of a first-order system is always

(a) <1

(b) >1

(c) 1

(d) 0



34. Solenoid value works like

(a) Proportional controller

(b) PD controller

(c) PID controller

(d) On-off controller



35. The final product from a chemical plant is composed of two material A and B with some of each being required. The total cost per unit of the finished product is

CT = Rupees/unit

If the amount of A is fixed, the amount of B required for minimum total cost of product is

(a)

(b)

(c) A/36

(d) 720A



36. Which of the following is NOT a function of baffle in the shell-and-tube heat exchanger?

(a) Direct the flow across the tube bundle

(b) Support the tube from sagging

(c) Arrest the vibration of the tubes

(d) Decrease the turbulence of the fluid



37. Match the following :

1. Microfiltration P. Solution/diffusion

2. Reverse Osmosis Q. Size exclusion

3. Distillation R. Vapor/liquid equilibria

4. Stripping S. Absorption



(a) 1-P, 2-Q, 3-R, 4-S

(b) 1-Q, 2-P, 3-R, 4-S

(c) 1-S, 2-R, 3-P, 4-Q

(d) 1-R, 2-Q, 3-S, 4-P



38. What is the cross-flow area in the case of a shell-and-tube heat exchanger where inside diameter of the shell is 5 m, baffle spacing 0.5 m, clearance between the tubes 5 cm, outside diameter of the tube 10 cm and pitch of the tube 2 cm ?

(a) 12.5 m2

(b) 6.25 m2

(c) 22.5 m2

(d) 10 m2



39. A chemical company has purchased leaf pressure filters with 100 ft2 for purifying an inorganic liquid stream at the cost of Rs.15000. In a similar application the company will need 900 ft2 leaf filter. The size exponent of this type of filter is 0.5. The purchased price of the 900 ft2 filter will be

(a) Rs.135000

(b) Rs.67500

(c) Rs.45000

(d) Rs.90000



40. Which of the following results in book values greater than those obtained with the straight line method?

(a) Declining balance method

(b) Sum-of-the years digit method

(c) Multiple straight line method

(d) Sinking fund method



41. The Darcy's law is used to calculate

(a) heat transfer coefficient

(b) friction factor in pipe flow

(c) permeability of porous medium

(d) vapor pressure in azeotropic mixtures



42. 'Total capital investment' for a chemical process plant comprises of the fixed capital investment and the

(a) working capital

(b) indirect production costs

(c) direct production costs

(d) overheat costs



43. Which of the following statements is INCORRECT for the manufacture of sulfuric acid by contact process ?

(a) Yield is higher than the chamber process

(b) Catalyst used is vanadium pent oxide on a porous carrier

(c) Final scrubbing is done using concentrated sulfuric acid only

(d) Optimization of space velocity in catalyst chamber is a major engineering problem



44. Match the following :

1. Paper P. Zeigler

2. Soda ash Q. Sachsse

3. Polyethylene R. Kraft

4. Acetylene S. Solvay



(a) 1-P, 2-R, 3-Q, 4-S

(b) 1-P, 2-Q, 3-R, 4-S

(c) 1-S, 2-R, 3-Q, 4-P

(d) 1-R, 2-S, 3-P, 4-Q



45. Match the following :

1. Maleic anhydride P. AgO

2. DDT Q. NH3

3. Ethylene oxide R. V2O5

4. Soda ash S. Oleum



(a) 1-R, 2-S, 3-P, 4-Q

(b) 1-S, 2-R, 3-Q, 4-P

(c) 1-R, 2-S, 3-Q, 4-P

(d) 1-P, 2-Q, 3-R, 4-S



46. Match the following :

1. Parathion P. Lead oxide

2. Margarine Q. Pesticide

3. Litharge R. Enzyme

4. Lipase S. Fat



(a) 1-S, 2-P, 3-Q, 4-R

(b) 1-S, 2-R, 3-Q, 4-P

(c) 1-Q, 2-S, 3-P, 4-R

(d) 1-R, 2-S, 3-P, 4-Q


47. Cetane number of diesel is the measure of its

(a) smoke point

(b) ignition delay

(c) viscosity

(d) oxidation stability


48. Choose the CORRECT statement from the following :

(a) Aromatics have lowest octane number

(b) Paraffins are the hardest to crack

(c) Dearomatisation of kerosene increases its smoke point

(d) Aniline point is a property of LPG


49. Choose the INCORRECT statement from the following

(a) SBR compared to natural rubber has poor tensile strength

(b) Silicone is an inorganic polymer

(c) Nylon-6 is a polyamide

(d) Neoprene is an elastomer


50. Match the following :

1. Permanent hardness of water P. Steam distillation

2. Alkyl group of detergent Q. Cation/anion exchanger

3. Rancidity of oil R. Hydrogenation

4. Essential oil S. Hydrophobic


(a) 1-Q, 2-S, 3-R, 4-P

(b) 1-Q, 2-R, 3-S, 4-P

(c) 1-R, 2-P, 3-Q, 4-S

(d) 1-S, 2-P, 3-R, 4-Q