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25 January 2024

[Solved paper]Deputy Manager (Production) Kerala PSC Previous Question Paper|Deputy Manager Kerala PSC Question paper 406/2022

 Deputy Manager (Production) Kerala PSC Previous Question Paper|Deputy Manager Kerala PSC Question paper 406/2022

Deputy Manager Travancore Sugars and Chemicals Ltd

Deputy Manager Travancore Sugars and Chemicals Ltd

Question Paper Code: 161/2023/OL

Category Code: 406/2022

Exam: Deputy Manager (Production)

Date of Test 13-11-2023

Department : Travancore Sugars and Chemicals Ltd

Deputy Manager Kerala PSC Question paper 406/2022

Question1:-Purging is done

        A:-To recover heat

        B:-To avoid accumulation of inert

        C:-To increase the yield

        D:-To control the concentration accurately

        Correct Answer:- Option-B

Question2:-Molality of a 20% NaOH solution is

        A:-20 M

        B:-6.25 M

        C:-0.00625 M

        D:-2 M

        Correct Answer:- Option-B

Question3:-Clapeyron equation relates

        A:-Vapour pressure with temperature

        B:-Vapour pressure with concentration

        C:-Vapour pressure with density

        D:-Vapour pressure with compressibility factor

        Correct Answer:- Option-A

Question4:-When two immiscible liquids are mixed, the boiling point of resulting


        A:-Is greater than the boiling point of both pure liquids

        B:-Is less than the boiling point of more volatile liquid

        C:-Lies between the boiling point of the pure liquids

        D:-May be less than or greater than the boiling point of low volatile liquid

        Correct Answer:- Option-B

Question5:-Fugacity and pressure are numerically equal when the gas is

        A:-At high pressure

        B:-At standard state

        C:-Ideal state

        D:-Low pressure

        Correct Answer:- Option-C

Question6:-Entropy of perfect crystalline substance at absolute zero is




        D:-Can't say

        Correct Answer:- Option-A

Question7:-Heat capacity of a gas is given by where is in kJ/kmol K

and T in K. Dimensions of constant a and b respectively are


        B:-kJ/kmolK, kJ/kmol

        C:-kJ/kmolK, kJ/kmolK

        D:-kJ/kmol , kJ/kmol

        Correct Answer:- Option-B

Question8:-Gross heating value of a fuel is obtained when water formed during

combustion is

        A:-In the vapour state

        B:-In the liquid state

        C:-In the vapour state or liquid state


        Correct Answer:- Option-B

Question9:-The point at which both liquid and gas phases are identical is called

        A:-Triple point

        B:-Saturation point

        C:-Critical point

        D:-Freezing point

        Correct Answer:- Option-C

Question10:-Seeds containing 30% oil and rest inerts is extracted with hexane. The

underflow analysed 10% oil and 20% hexane. The percent recovery of oil is





        Correct Answer:- Option-D

Question11:-The dimensions of kinematic viscosity is





        Correct Answer:- Option-A

Question12:-Loss due to sudden contraction is proportional to

        A:-Velocity head




        Correct Answer:- Option-A

Question13:-In laminar flow through a pipe, if the diameter of the pipe is reduced to

half, for a constant volumetric flow rate, pressure drop across the pipe

        A:-Increases two times

        B:-Decreases two times

        C:-Decreases 16 times

        D:-Increases 16 times

        Correct Answer:- Option-D

Question14:-In Venturimeter pressure loss is

        A:-more than orifice meter

        B:-less than orifice meter

        C:-same as orifice meter

        D:-can't say

        Correct Answer:- Option-B

Question15:-Cavitation in a centrifugal pump can be prevented by

        A:-maintaining suction head equal to developed head

        B:-maintaining suction head lower than the vapour pressure

        C:-maintaining suction head sufficiently greater than the vapour pressure

        D:-by proper sizing of suction line

        Correct Answer:- Option-C

Question16:-Priming is required for

        A:-Centrifugal pump

        B:-Plunger pump

        C:-Piston pumps

        D:-All pumps

        Correct Answer:- Option-A

Question17:-Hydraulic radius for a circular pipe of diameter D is given by





        Correct Answer:- Option-A

Question18:-Drag is the force exerted by the

        A:-Solid on the fluid in the opposite direction of flow

        B:-Fluid on the solid in the opposite direction of flow

        C:-Fluid on the solid in the direction of flow

        D:-Solid on the fluid in the direction of flow

        Correct Answer:- Option-C

Question19:-Viscosity increases with stress over time for

        A:-Thixotropic fluid

        B:-Rheopectic fluid

        C:-Bingham plastic

        D:-Newtonian fluid

        Correct Answer:- Option-B

Question20:-Pressure drop across the fluidized bed with increase in expansion of

the bed



        C:-First increases and then decreases

        D:-Remains constant

        Correct Answer:- Option-D

Question21:-In a Tylor standard screen series, the ratio of the area of the openings

in any screen to that of the next smaller screen is





        Correct Answer:- Option-D

Question22:-Crushing of sticky clay is done by

        A:-Ball mill

        B:-Jaw crusher

        C:-Hammer mills

        D:-Fluid energy mill

        Correct Answer:- Option-C

Question23:-For marine impeller, the flow number may be considered constant and

equal to





        Correct Answer:- Option-B

Question24:-The McCabe Δ L Law states that the

        A:-The linear crystal growth rate does not depends on the crystal size

        B:-The linear crystal growth rate depends on the crystal size

        C:-Theoretical growth rate proportional to area

        D:-Imperfections in the crystal size

        Correct Answer:- Option-A

Question25:-In a rotary drum filter, the filtration rate

        A:-Remains unaffected with change in drum speed

        B:-Increases with increases in speed

        C:-Decreases with increase in drum speed

        D:-Increases linearly with increase in drum speed

        Correct Answer:- Option-B

Question26:-A cyclone separator collection efficiency is a function of

        A:-Particle size distribution of the feed

        B:-Average particle size

        C:-Increased centrifugal action

        D:-Decreased centrifugal action

        Correct Answer:-Question Cancelled

Question27:-Mass flow bins has the characteristics of

        A:-Density can vary

        B:-Product can remain in dead zones until complete cleanout of the system

        C:-Flow is erratic

        D:-Flow is uniform

        Correct Answer:- Option-D

Question28:-Used to enlarge the storage bin opening and cause flow by breaking

up material bridges are known as


        B:-Belt feeders

        C:-Apron feeders

        D:-Vibrating hoppers

        Correct Answer:- Option-D

Question29:-As the distance between the heat source and the object receiving the

heat increases, the rate of heat transfer by radiation


        B:-Increases linearly


        D:-Remains constant

        Correct Answer:- Option-C

Question30:-Calculate the rate of heat transfer per unit area through a copper plate

45 mm thick whose one face is maintained at 350°C and the other face at 50°C.

Take thermal conductivity of copper as 370 W/m°C.

        A:-0.455 MW/

        B:-0.566 MW/

        C:-2.466 MW/

        D:-3.466 MW/

        Correct Answer:- Option-C

Question31:-The colburn j factor for heat transfer is defined as





        Correct Answer:- Option-C

Question32:-Peclet number is defined as

        A:-Ratio between rate of heat transfer by convection to rate of heat transfer by

bulk flow

        B:-Ratio between rate of heat transfer by bulk flow to rate of heat transfer by


        C:-Ratio between rate of heat transfer by bulk flow to rate of heat transfer by


        D:-Ratio between momentum diffusivity to thermal diffusivity

        Correct Answer:- Option-C

Question33:-For the nucleate boiling on a vertical flat plate, Jacob correlation is

given as





        Correct Answer:- Option-D

Question34:-Film wise condensation

        A:-is characterized by a thin liquid film forming over the entire surface

        B:-is less common than drop wise condensation

        C:-occurs on non wettable surfaces

        D:-is charaterized by high heat transfer coefficients than that for drop wise


        Correct Answer:- Option-A

Question35:-Assuming the sun to be a black body emitting radiation with maximum

intensity at   , what is the surface temperature of the sun?





        Correct Answer:- Option-B

Question36:-A cold fluid is heated from 40°C to 130°C by steam at 150°C. The

LMTD in parallel flow is

        A:-Lower than the LMTD in counter flow

        B:-Greater than the LMTD in counter flow

        C:-Equal to the LMTD in counter flow


        Correct Answer:- Option-A

Question37:-The tube side heat transfer coefficient just at the entrance of tube is




        D:-same as the average value of heat transfer coefficient for tube side

        Correct Answer:- Option-C

Question38:-The steam economy of an evaporator is defined as

        A:-the number of kilograms of steam consumed per hour

        B:-the number of kilograms of steam consumed per kilogram of solvent


        C:-the number of kilograms of solvent vapourized per hour

        D:-the number of kilograms of solvent vaporized per kilogram of steam fed to

the evaporator

        Correct Answer:- Option-D

Question39:-The rate of diffusion in gases is about





        Correct Answer:-Question Cancelled

Question40:-Which one of the following is not associated with absorption columns?





        Correct Answer:- Option-A

Question41:-A plot of partial pressure of the absorbed gas against temperature at

various constant volume is known as


        B:-Adsorption isobar

        C:-Adsorption isostere

        D:-None of the above

        Correct Answer:- Option-C

Question42:-Pick out the correct statement:

        A:-Fenske equation is used to calculate the minimum reflux ratio in distillation

        B:-Fenske equation is used to calculate the optimum reflux ratioin distillation

        C:-Fenske equation is used to calculate the minimum number of plates for

constant relative volatility

        D:-Fenske equation is used to calculate the minimum number of plates for

multi component distillation

        Correct Answer:- Option-C

Question43:-When the Lewis number is equal to 1

        A:-Humid heat is almost equal to the specific heat

        B:-Concentration boundary layer is present above the thermal boundary layer

        C:-Psychrometric line is present above that of the adiabatic saturation line

        D:-Psychromatic line is present below the adiabatic saturation line

        Correct Answer:- Option-A

Question44:-In Liquid-Liquid extractors, the interface is set in an open section

        A:-at the middle of the extractor

        B:-at the top or bottom of the extractor

        C:-at the inlet of dispersed phase

        D:-at the inlet of the continuous phase

        Correct Answer:- Option-B

Question45:-Removal of one element from a solid alloy is known as

        A:-Selective leaching




        Correct Answer:- Option-A

Question46:-Which of the following terminology correspond to Freeze drying?


        B:-Salt solution

        C:-Short drying time

        D:-Operates at high pressure

        Correct Answer:- Option-A

Question47:-The point where the falling rate drying curve intercepts the x-axis

corresponds to

        A:-Unbound moisture

        B:-Equilibrium moisture

        C:-Free moisture

        D:-Critical moisture

        Correct Answer:- Option-B

Question48:-In a McCabe-Thiele diagram of a binary distillation, the q-line for a feed

of Saturated Vapour

        A:-will be a vertical line

        B:-will be a horizontal line

        C:-have slope infinity

        D:-have slope positive

        Correct Answer:- Option-B

Question49:-Volume of the reactor corresponding to 100% conversion is

        A:-100 litres

        B:-50 litres

        C:-10 litres


        Correct Answer:- Option-D

Question50:-For the reactions requiring large residence time, which one of the

following reactors is perferred?

        A:-Continuous Stirred Reactor (CSTR)

        B:-Plug Flow Reactors (PFR)

        C:-Tubular reactors

        D:-Combinations of CSTR and PFR

        Correct Answer:-Question Cancelled

Question51:-Example for solid-solid reaction





        Correct Answer:- Option-C

Question52:-Pick out the wrong statement from the following:

        A:-Batch reactors operates under steady state

        B:-Batch reactors have back mixing

        C:-Batch reactors operates under unsteady state

        D:-Batch reactors are used in pharmaceutical industries

        Correct Answer:- Option-A

Question53:-In a plug flow reactor, under what condition, ideal plug flow will be


        A:-Reynolds number = 2100

        B:-Reynolds number < 2100

        C:-Reynolds number infinity

        D:-Reynolds number zero

        Correct Answer:- Option-D

Question54:- in Michaelis-Menten equation is

        A:-Bimolecular association rate constant of enzyme-substrate binding

        B:-Substrate concentration at which the reaction velocity is half of the

maximum reaction velocity

        C:-Unimolecular rate constant of the enzyme-substrate complex dissociating

to enzyme and substrate

        D:-Unimolecular rate constant of the enzyme-substrate complex dissociating

to enzyme and product

        Correct Answer:- Option-B

Question55:-When , the ratio of





        Correct Answer:-Question Cancelled

Question56:-If the residence time obtained for a reactor by the RTD experiment is

less than that expected, it indicates

        A:-Combination of PFR and CSTR



        D:-Presence of dead volume

        Correct Answer:- Option-D

Question57:-One parameter in non-ideal PFR is

        A:-Number of ideal tanks

        B:-Dispersion co-efficient

        C:-Residence time

        D:-None of the above

        Correct Answer:- Option-B

Question58:-For tanks in series model, the spread of the trace curve is to

        A:-Cube of the distance from the tracer origin

        B:-Square of the distance from the tracer origin

        C:-1/square of the distance from the tractor origin

        D:-Square root of the distance from the tracer origin

        Correct Answer:- Option-D

Question59:-Introduction of an integral action in the forward path of a unity

feedback system results in a

        A:-marginally stable system

        B:-system with no steady state error

        C:-system with reduced noise immunity

        D:-system with better speed of response

        Correct Answer:- Option-B

Question60:-Identify the correct statement from the following:

        A:-Absolute humidity is expressed in percentage

        B:-Warm air possesses less water vapor than cold air

        C:-The higher the amount of water vapour, the higher the absolute humidity

        D:-Saturated air has an absolute humidity of 100%

        Correct Answer:- Option-C

Question61:-In measurement systems, which of the following are undesirable static


        A:-Drift, static error and dead zone

        B:-Reproducibility and non-linearity

        C:-Sensitivity and accuracy

        D:-Drift, Static error, dead zone and non-linearity

        Correct Answer:- Option-D

Question62:-The primary controller in a cascade control system must always be


        A:-faster than the secondary

        B:-using the Ziegler-Nichols method

        C:-with greater filtering than the secondary

        D:-after the secondary is tuned

        Correct Answer:- Option-D

Question63:-What is the relation between bar and psi?

        A:-1 bar = 1 psi

        B:-1 bar = 201 psi

        C:-1 bar = 20 psi

        D:-1 bar = 14.5 psi

        Correct Answer:- Option-D

Question64:-Phase lag of the frequency response of a second order system to a

sinusoidal forcing function

        A:-approaches 180° asymptotically

        B:-is 120°

        C:-is 30°

        D:-is 90°

        Correct Answer:- Option-A

Question65:-Which of the following is not an advantage of laminar flow burner used

in flame photometry?

        A:-Stable flame for analysis


        C:-Sample containing two or more solvents can be burned efficiently

        D:-Efficient atomization of sample

        Correct Answer:- Option-C

Question66:-The temperature of tempering oil baths maintained at 400°C during

heat treatment of steel is measured by a/an ___________ thermocouple.




        D:-None of these

        Correct Answer:- Option-A

Question67:-Cavitation in a control valve is caused by

        A:-a laminar flow regime

        B:-vibration in the packing

        C:-the Von Karman effect

        D:-pressure recovery

        Correct Answer:- Option-D

Question68:-In a feed-back control system G and H denote open loop and close

loop transfer functions respectively. The output-input relationship is

        A:-H / (1 + G)

        B:-G / (1 + H)

        C:-G / H

        D:-H / G

        Correct Answer:- Option-A

Question69:-Aerobic process of water treatment

        A:-produces more sludge than anaerobic process

        B:-produces less sludge than anaerobic process

        C:-produces same amount of sludge as anaerobic process

        D:-produces no sludge

        Correct Answer:- Option-A

Question70:-The power development by a hydro plant is directly proportional to

        A:-head of dam

        B:-discharge of water

        C:-product of discharge and head of water

        D:-none of the above

        Correct Answer:- Option-C

Question71:-Which type of fire extinguisher must not be used in case of electrical

base fire?

        A:-Halon extinguisher

        B:-Carbon chloride extinguisher

        C:-Foam extinguisher

        D:-Dry power extinguisher

        Correct Answer:- Option-C

Question72:-Match the following:

                List I                           List II

a.     R.D.X.                   i.     Cyclotetramethylene tetranitraamine

b.     P.E.T.N.                 ii.     2, 4, 6 Trinitrotoluene

c.     H.M.X.                  iii.     Pentaerythritol teranitrate

d.    T.N.T.                    iv.     Cyclotrimethlene trinitra amine

a     b      c      d

        A:-i      ii     iii     iv

        B:-ii      iii     iv     i

        C:-iv      i     ii     iii

        D:-iv      iii     i     ii

        Correct Answer:- Option-D

Question73:-High COD to BOD ratio of an organic pollutant represents:

        A:-Presence of free oxygen for the aerobic decomposition

        B:-high biodegradability of the pollutant

        C:-presence of toxic material in the pollutant

        D:-low biodegradability of the pollutant

        Correct Answer:- Option-D

Question74:-By using combined cycle steam and gas power plant

        A:-specific fuel consumption can be decreased

        B:-efficiency increased

        C:-Specific fuel consumption can be decreased and efficiency increased

        D:-None of the mentioned above

        Correct Answer:- Option-C

Question75:-In fault tree analysis, event symbols describe the events that lead to

        A:-Subsystem level failure

        B:-Parts level failure

        C:-System level failure

        D:-Component level failure

        Correct Answer:- Option-C

Question76:-The plume behavior which occurs in the super adiabatic condition with

light to moderate wind speed in the presence of large-scale thermal eddies are

known as

        A:-Coning Plume

        B:-Looping Plume

        C:-Neutral Plume

        D:-Fanning Plume

        Correct Answer:- Option-B

Question77:-The operating temperature of a central receiver power tower of solar

plant is

        A:-100°C - 200°C

        B:-5000°C - 10000°C

        C:-1000°C - 5000°C

        D:-500°C - 1000°C

        Correct Answer:- Option-D

Question78:-If you bypass an emergency shutdown (ESD) function for preventive

maintenance but have not properly defined mitigations, you have

        A:-Weakened the hardware barrier

        B:-Removed a hardware barrier

        C:-Removed a human barrier

        D:-None of the above

        Correct Answer:- Option-B

Question79:-At point where dissolved oxygen is minimum

        A:-Rate of reaeration equals rate of deoxygenation

        B:-Rate of reaeration exceeds rate of deoxygenation

        C:-Rate of deoxygenation exceeds rate of reaertion

        D:-Rate of reaeration equals two times rate of deoxygenation

        Correct Answer:- Option-C

Question80:-What is downwind turbine?

        A:-Rotor is positioned at the three-quarters of the height of the tower

        B:-Rotor of the turbine is in front of the unit

        C:-Rotor is positioned at the bottom of the tower

        D:-Rotor of the turbine is behind the unit

        Correct Answer:- Option-D

Question81:-The type of polymerisation involved in the formation of Nylon-6 is

        A:-Ring opening polymerisation

        B:-Condensation Polymerisation

        C:-Addition Polymerisation

        D:-None of the above

        Correct Answer:- Option-A

Question82:-Mostly Sulphuric Acid is manufactured by

        A:-Girbatol process

        B:-Frasch process

        C:-Electric process

        D:-Double contact double absorption process

        Correct Answer:- Option-D

Question83:-Undesirable side reaction occured during the manufacture of Urea is

        A:-Formation of

        B:-Formation of

        C:-Formation of

        D:-None of the above

        Correct Answer:- Option-C

Question84:-Strength of sugar solutions are expressed in





        Correct Answer:- Option-C

Question85:-In petroleum refinery operations, __________ process is used for

converting paraffins and naphthenes to aromatics.



        C:-Catalytic reforming


        Correct Answer:- Option-C

Question86:-Select the correct combination that correctly matches the process in

group 1 with the entries in group 2:

                      Group 1                                       Group 2

P.     Electric Process                          I.     Pulp production

Q.    Sulphite Process                       II.     Phosphorus production

R.    Solvay Process                          III.    Sulpher Mining

S.    Frasch Process                          IV.     Soda ash

        A:-P - III, Q - IV, R - II, S - I

        B:-P - IV, Q - II, R - III, S - I

        C:-P - II, Q - I, R - IV, S - III

        D:-P - I, Q - IV, R - III, S - II

        Correct Answer:- Option-C

Question87:-Polyvinyl chloride is prepared by

        A:-Addition type kinetics

        B:-Condensation polymerisation

        C:-Reacting hydrochloric acid with polyethylene

        D:-Reacting chlorine with polyethylene

        Correct Answer:- Option-A

Question88:-Catalitic cracking is a

        A:-Hydrogen addition process

        B:-Breaking down of higher molecular weight componds to lower molecular

weight compounds with endothermic reaction

        C:-Breaking down of higher molecular weight componds to lower molecular

weight compounds with exothermic reaction

        D:-A coking process

        Correct Answer:- Option-B

Question89:-Tripple superphosphate is prepared by the reaction of

        A:-Phosphate rock with sulphuric acid

        B:-Phosphate rock with phosphoric acid

        C:-Phosphate rock with sulpher

        D:-None of the above

        Correct Answer:- Option-B

Question90:-In India which one of the industries produce elemental sulpher as a by


        A:-Petroleum refineries

        B:-Paper and pulp industries

        C:-Coal mining plants

        D:-Sulphuric acid plants

        Correct Answer:- Option-A

Question91:-If the interest rate is 12% and the compounding is done at the end of

every two months, the effective rate of return will be





        Correct Answer:- Option-B

Question92:-Allocation of depreciation is uniform in

        A:-Straight line method

        B:-Sinking fund method

        C:-Declining balance method

        D:-Units of producing method

        Correct Answer:- Option-A

Question93:-Quick ratio is defined as

        A:-Liquid Assets / Current liabilities

        B:-Current Assets / Current liabilities

        C:-Working Assets / Current assets

        D:-Liquid Assets / Total investment

        Correct Answer:- Option-A

Question94:-At discounted cashflow rate of return

        A:-Net Present Value = 0

        B:-Net Present Value > 0

        C:-Net Present Value < 0

        D:-Can't Predict

        Correct Answer:- Option-A

Question95:-If the investment at zero time is 10 lakhs and annual cash flow is Rs.

2,50,000, the payback period will be

        A:-2 years

        B:-2.5 years

        C:-4 years

        D:-3 years

        Correct Answer:- Option-C

Question96:-At break even point

        A:-Cash flow is zero

        B:-Sales venue is zero

        C:-Total cost is zero

        D:-Gross Profit is zero

        Correct Answer:- Option-D

Question97:-If the cost of a 100 MT chemical plant is 50 lakhs in the year 2005,

what is the cost of a 200 MT plant in the year 2010? Assume that the cost index in

2005 and 2010 were 450 and 540 respectively.

        A:-90 lakhs

        B:-120 lakhs

        C:-60 lakhs

        D:-100 lakhs

        Correct Answer:- Option-A

Question98:-Which of the following is not correct?

        A:-CPM uses deterministic model

        B:-PERT uses probabilistic model

        C:-CPM is used for projects that require research and development

        D:-PERT is an event oriented technique

        Correct Answer:- Option-C

Question99:-Which one of the following is not a current asset?

        A:-Cash in hand


        C:-Sundry debtors

        D:-Bills receivable

        Correct Answer:- Option-B

Question100:-Which one of the following is correct?

        A:-Creditor is a person who owes money to the business

        B:-Sundry debtor is a liability

        C:-Closing stock will not appear in trial balance

        D:-Secured loan is not a liability

        Correct Answer:- Option-C


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