Trade Instructor Grade II (Electroplating) - Department Technical Education

 PROVISIONAL ANSWER KEY
Question Paper Code: 51/2024/OL
Category Code: 092/2023
Exam: Trade Instructor Grade II (Electroplating)
Date of Test 10-05-2024
Department Technical Education

Question1:-What is the electron configuration of copper atom ?
        A:-2,8,8,1
        B:-2,8,18,1
        C:-2,8,8,18,1
        D:-2,8,8,8,1
        Correct Answer:- Option-B

Question2:-How many electrons pass through a conductor in one second having resistance of one ohm with a potential difference of one volt causes one ampere
current passed through it ?
        A:-624 × 10¹⁸
        B:-0.624 × 10¹⁸
        C:-6.24 × 10¹⁸
        D:-62.4 × 10¹⁸
        Correct Answer:- Option-C

Question3:-What is call the quantity of electricity transferred in one second by a current of one ampere ?
        A:-AMPERE
        B:-VOLT
        C:-IMPEDANCE
        D:-COULOMB
        Correct Answer:- Option-D

Question4:-What is the coefficient of linear expansion of copper at 20°C ?
        A:-17 × 10^-6
        B:-17 × 10^-7
        C:-1.7 ×10^-6
        D:-0.17 ×10^-6
        Correct Answer:- Option-A

Question5:-What is the tensile strength of Aluminum conductor in NW/mm² ?
        A:-170
        B:-70
        C:-660
        D:-2.7
        Correct Answer:- Option-B

Question6:-What is the melting point of copper ?
        A:-1803°C
        B:-1683°C
        C:-1083°C
        D:-1883°C
        Correct Answer:- Option-C

Question7:-What is the accuracy of a metric outside micrometer ?
        A:-0.001 mm
        B:-0.0001 mm
        C:-1.01 mm
        D:-0.01 mm
        Correct Answer:- Option-D

Question8:-What is the total/effective resistance of a circuit having Three 3Ω resistance are connected in parallel ?
        A:-1Ω
        B:-3Ω
        C:-1.5Ω
        D:-9Ω
        Correct Answer:- Option-A

Question9:-Which is the smallest unit of work done in CGS system ?
        A:-Dyne
        B:-Erg
        C:-Joule
        D:-Gram
        Correct Answer:- Option-B

Question10:-Which name the power that occurs inside the motor ?
        A:-Internal Horse Power
        B:-Brake Horse Power
        C:-Indicated Horse Power
        D:-Metric Horse Power
        Correct Answer:- Option-C

Question11:-The number of neutrons in is
        A:-35
        B:-81
        C:-46
        D:-116
        Correct Answer:- Option-C

Question12:-Which of the following represents the correct order of decreasing metallic characters for elements Si, Be, Mg, Na and P ?
        A:-Na > Be > Mg > P > Si
        B:-Na > Mg > Be > P > Si
        C:-Na > Be > P > Mg > Si
        D:-Na > Mg > Be > Si > P
        Correct Answer:- Option-D

Question13:-The pH of 0.01 M HCl aqueous solution is
        A:-0
        B:-2
        C:-3
        D:-10
        Correct Answer:- Option-B

Question14:-The hydrolysis product of which among the following salts will have acidic behaviour
        A:-NaCl
        B:-Na₂CO₃
        C:-CH₃COONa
        D:-NH₄CI
        Correct Answer:- Option-D

Question15:-Which among the following is not a scale of electronegativity of elements ?
        A:-Pauling scale
        B:-Jefferson scale
        C:-Allred - Rochow scale
        D:-Mulliken - Jaffe scale
        Correct Answer:- Option-B

Question16:-Predict the formula of the stable binary compound formed by the combination of beryllium and hydrogen.
        A:-BeH₂
        B:-BeH
        C:-Be₂H
        D:-Be₂H₂
        Correct Answer:- Option-A

Question17:-The atomic number of Cr and Mn are 24 and 25 respectively. The electronic configuration represents
        A:-Cr³⁺
        B:-Cr⁺
        C:-Mn
        D:-Mn⁺
       Correct Answer:- Option-B

Question18:-Hard water is softened by using calgon. Chemically calgon is
        A:-
        B:-
        C:-
        D:-
        Correct Answer:- Option-D

Question19:-Which among the following is an example for a basic buffer solution ?
        A:-
        B:-
        C:-
        D:-
        Correct Answer:- Option-D

Question20:-Mathematical expression of Heisenberg's uncertainty principle for motion of microscopic objects is (Where, Δx − uncertainty in position, Δ  − uncertainty in momentum, Δ  − uncertainty in velocity)
        A:-Δx Δ ≥
        B:-Δx Δ  ≤
        C:-Δx Δ ≥
        D:-Δx Δ  ≤
        Correct Answer:- Option-A

Question21:-During electroplating the substance to be plated will act as
        A:-Anode
        B:-Electrolyte
        C:-Cathode
        D:-Anode and Electrolyte
        Correct Answer:- Option-C

Question22:-Which of the following is a secondary cell ?
        A:-Dry cell
        B:-Mercury cell
        C:-Button cell
        D:-Lead storage battery
        Correct Answer:- Option-D

Question23:-What is the potential of standard hydrogen electrode when it is coupled with Cu cell ?
        A:-1V
        B:-0V
        C:-0.34V
        D:-—0.76V
        Correct Answer:- Option-B

Question24:-Which among the following is an electrolyte ?
        A:-Solid NaCl
        B:-Molten NaCl
        C:-
        D:-
        Correct Answer:- Option-B

Question25:-In an electrochemical cell which among the statement is correct ?
I. Oxidation occurs at the cathode
II. Reduction occurs at the cathode
III. Redox reaction occurs at the anode
IV. Oxidation occurs at the anode
        A:-I and II
        B:-I and III
        C:-II only
        D:-II and IV
        Correct Answer:- Option-D

Question26:-What is the product obtained at cathode when aqueous NaCl is electrolysed ?
        A:-
        B:-Na
        C:-
        D:-
        Correct Answer:- Option-A

Question27:-One Faraday stands for
        A:-Mass of one mole electrons
        B:-Charge of one million electrons
        C:-Charge of one mole electrons
        D:-Mass of one million electrons
        Correct Answer:- Option-C

Question28:-Who was first described the quantitative aspect of electrolysis ?
        A:-Albert Einstein
        B:-Michael Faraday
        C:-Issac Newton
        D:-J.J. Thomson
        Correct Answer:- Option-B

Question29:-How much electricity is needed to deposit one mole of Aluminium ?
        A:-1F
        B:-2F
        C:-3F
        D:-4F
        Correct Answer:- Option-C

Question30:-Electrochemical equivalent is
        A:-
        B:-
        C:-
        D:-None of these
        Correct Answer:- Option-A

Question31:-Which is the name of process that cleans the metal in acid to remove corrosion products from the surface ?
        A:-Pickling
        B:-Drying
        C:-Degreasing
        D:-Deburring
        Correct Answer:- Option-A

Question32:-Which type of corrosion produces attack in the form of spots, pits on holes ?
        A:-Galvanic corrosion
        B:-Uniform corrosion
        C:-Erosion corrosion
        D:-Pitting corrosion
        Correct Answer:- Option-D

Question33:-Which one of the following metal has high resistance to corrosion in sea shore area ?
        A:-Silver
        B:-Cadmium
        C:-Nickel
        D:-Chromium
        Correct Answer:- Option-B

Question34:-Which plating have the special properties like high hardness, low coefficient of friction, high resistance to corrosion and ability to withstand high temperature ?
        A:-Cadmium
        B:-Bright chromium
        C:-Bright nickel
        D:-Hard chromium
        Correct Answer:- Option-D

Question35:-Which process is used to deposit one metal over another metal for protection against corrosion ?
        A:-Electroplating
        B:-Amalgamising
        C:-Cathodic Protection
        D:-Carbon treatment
        Correct Answer:- Option-A

Question36:-Which one of the following coating is not used for decorative finishing ?
        A:-Nickel plating
        B:-Cadmium plating
        C:-Gold plating
        D:-Silver plating
        Correct Answer:- Option-B

Question37:-Which process follows polishing in electroplating ?
        A:-Drying
        B:-Buffing
        C:-Deburring
        D:-De-Scaling
        Correct Answer:- Option-B

Question38:-Which gas is normally liberated from the cathode of plating bath ?
        A:-Oxygen
        B:-Chlorine
        C:-Hydrogen
        D:-Carbon dioxide
        Correct Answer:- Option-C

Question39:-What is "Stop-Off" in electroplating?
        A:-To add brightner
        B:-To lower current density
        C:-Masking applied where plating is not required
        D:-To add water
        Correct Answer:- Option-C

Question40:-What is the need of effluent treatment in electroplating ?
        A:-Dispose Polluted water
        B:-Dispose Unpolluted water
        C:-Dispose Rain Water
        D:-Dispose Well water
        Correct Answer:- Option-A

Question41:-Which is the reason for using lining tank for electroplating ?
        A:-For not reacting with chemicals
        B:-For bath balancing
        C:-For reacting with chemicals
        D:-For cleaning
        Correct Answer:- Option-A

Question42:-What is the purpose of lead lained heater used for chromium plating ?
        A:-To increase Metal content
        B:-To increase Bath cooling
        C:-To increase Bath Temperature
        D:-To increase pH
        Correct Answer:- Option-C

Question43:-Which is the method for removing suspended matters from the zinc plating solution ?
        A:-Filter the solution
        B:-Heat the solution
        C:-Reduce current density
        D:-Reduce voltage
        Correct Answer:- Option-A

Question44:-What is the name of the material used to reduce the loss of heat and evaporation in chromium plating bath ?
        A:-Inhibitor
        B:-Dummy cathode
        C:-Anode bag
        D:-Polypropylene chroffles
        Correct Answer:- Option-D

Question45:-Which is the equipment extensively used for the final drying out of rack components to ensure rapid drying ?
        A:-Hot air ovens
        B:-Barrels
        C:-Filter unit
        D:-Bus bar
        Correct Answer:- Option-A

Question46:-What is the main application of plating barrel ?
        A:-Less production of wide variety of large articles
        B:-Bulk production of wide verity of small articles
        C:-For Anodising process
        D:-For plating bath analysis
        Correct Answer:- Option-B

Question47:-Which equipment is used in electroplating industry to converts alternating current to direct current ?
        A:-Transformer
        B:-Rheostat
        C:-Potentiometer
        D:-Rectifier
        Correct Answer:- Option-D

Question48:-Which chemical is used for vapour degreasing ?
        A:-Trichloroethylene
        B:-Sodium carbonate
        C:-Trisodium phosphate
        D:-Sodium hydroxide
        Correct Answer:- Option-A

Question49:-Which instrument is used to measure pH value quick and more accurately ?
        A:-pH meter
        B:-Universal indicator
        C:-pH scale
        D:-Indicator
        Correct Answer:- Option-A

Question50:-_______ is a process in which cations or anions are captured from solutions, with the help of artificial polymeric resins, produce de-ionised water.
        A:-Coagulation
        B:-Ultraviolet radiation
        C:-Ion exchange
        D:-Reverse osmosis
        Correct Answer:- Option-C

Question51:-Which is the common abrasive used for mechanical polishing ?
        A:-Emery
        B:-Dust
        C:-Quartz
        D:-Sand
        Correct Answer:- Option-A

Question52:-Which mop is used for polishing the inside of cup shaped articles ?
        A:-Solid felt wheel
        B:-Leather wheel
        C:-Bottom mop
        D:-Stitched mop
        Correct Answer:- Option-C

Question53:-Which treatment is used in sand blasting for the removal of sand from its surface ?
        A:-Sulphuric acid pickling
        B:-Chromic acid pickling
        C:-Hydrochloric acid pickling
        D:-Hydroflouric acid pickling
        Correct Answer:- Option-D

Question54:-Which neutralizing dip is used to reduce rusting after the acid pickled steel parts ?
        A:-Alkaline solution
        B:-Acid solution
        C:-Chromate solution
        D:-Sulphate solution
        Correct Answer:- Option-A

Question55:-Which is the name of the process that cleans the metal in acid to remove corrosion products from the surface ?
        A:-Pickling
        B:-Degreasing
        C:-Deburring
        D:-Drying
        Correct Answer:- Option-A

Question56:-Which is used for additional polishing in barrel plating ?
        A:-Fibre glass
        B:-Saw dust
        C:-Mica
        D:-Leather pieces
        Correct Answer:- Option-D

Question57:-What is the first step in a chemical cleaning cycle employed for heavily contaminated items ?
        A:-Solvent cleaning
        B:-Vapour cleaning
        C:-Ultrasonic cleaning
        D:-Electrolytic cleaning
        Correct Answer:- Option-A

Question58:-Which of the process includes degreasing and pickling ?
        A:-Post Treatment
        B:-Mechanical Treatment
        C:-Pre Treatment
        D:-Backing Treatment
        Correct Answer:- Option-C

Question59:-Which cleaning process the cleaning action is generated by sound waves ?
        A:-Hot soak cleaning
        B:-Alkaline soak cleaning
        C:-Ultrasonic cleaning
        D:-Vapour degreasing
        Correct Answer:- Option-C

Question60:-Which method of masking is suitable for masking process during hard chromium plating ?
        A:-Cleaning
        B:-Pickling
        C:-Stop off lacquer
        D:-De-Burring
        Correct Answer:- Option-C

Question61:-What are the chemicals contained in electrolyte for copper plating in acid bath ?
        A:-Copper sulphate and Sulphuric acid
        B:-Chromic acid and Sulphuric acid
        C:-Nitric acid and Sulphuric acid
        D:-Oxalic acid and Sulphuric acid
        Correct Answer:- Option-A

Question62:-Which is the function of boric acid in nickel plating ?
        A:-Inhibitor
        B:-Buffer
        C:-Complexing agent
        D:-Reduction agent
        Correct Answer:- Option-B

Question63:-Which bath is generally used for providing an undercoat for nickelchromium plating ?
        A:-Sulphate copper bath
        B:-Phosphate copper bath
        C:-Cyanide copper bath
        D:-Acid copper bath
        Correct Answer:- Option-C

Question64:-Which is the reason that metallic chromium anodes are not used for chromium plating ?
        A:-Low cost in chromium
        B:-Not dissolved in chromium bath
        C:-Quickly dissolved in chromium bath
        D:-Energy saved in chromium bath
        Correct Answer:- Option-C

Question65:-Which type of plating is used for cylinder piston parts ?
        A:-Hard chromium
        B:-Nickel chromium
        C:-Bright chromium
        D:-Copper chromium
        Correct Answer:- Option-A

Question66:-What is the major application of zinc ?
        A:-Galvanizing and Anodising
        B:-Alloying and Galvanizing
        C:-Nickeling and Chromium
        D:-Passivation and Galvanization
        Correct Answer:- Option-B

Question67:-What kind of damage for metal or alloy caused by absorption of hydrogen ?
        A:-Hydrogen embrittlement
        B:-Hydrogen over potential
        C:-Hydrogen Diffusion
        D:-Hydrogen absorption
        Correct Answer:- Option-A

Question68:-Which is the traditional coating used in the production of food cans ?
        A:-Zinc
        B:-Cadmium
        C:-Nickel
        D:-Tin
        Correct Answer:- Option-D

Question69:-Which is the cathode efficiency of acid Tin plating solution ?
        A:-90 to 95%
        B:-50 to 75%
        C:-45 to 60%
        D:-98 to 100%
        Correct Answer:- Option-D

Question70:-What is the process of removal of coating from its base metal ?
        A:-Vapourising
        B:-Galvanising
        C:-Stripping
        D:-De ionizing
        Correct Answer:- Option-C

Question71:-Which is the term used for flash gold plating of ornaments ?
        A:-Gilding
        B:-Sliding
        C:-Rolling
        D:-Scailing
        Correct Answer:- Option-A

Question72:-What is necessary to avoid roughness of deposit due to insoluble particles in the plating solution ?
        A:-Agitation
        B:-Degreasing
        C:-Filtration
        D:-Pickling
        Correct Answer:- Option-C

Question73:-What is the reason for using cyanide copper plating on complex shaped components ?
        A:-High conductivity
        B:-High durability
        C:-High throwing power
        D:-High stability
        Correct Answer:- Option-C

Question74:-Which chemical should be added time to time for maintaining the cyanide content of the cyanide copper plating bath ?
        A:-Hydrochloric acid
        B:-Acetic acid
        C:-Sodium hydroxide
        D:-Sodium cyanide
        Correct Answer:- Option-D

Question75:-Which is the application of cadmium plating ?
        A:-Marine equipment
        B:-Food stuffs
        C:-Drinking water equipment
        D:-Kitchen equipment
        Correct Answer:- Option-A

Question76:-What is the reason for burnt deposit in copper plating ?
        A:-Low metal content
        B:-High metal content
        C:-High temperature
        D:-High current
        Correct Answer:- Option-D

Question77:-Which process provides an effective method for the removal of organic impurities from nickel plating solution ?
        A:-Filtration
        B:-Agitation
        C:-Mechanical cathode movement
        D:-Activated carbon treatment
        Correct Answer:- Option-D

Question78:-Which is added to correct the excess sulphate in bright chromium plating bath ?
        A:-Calcium carbonate
        B:-Barium carbonate
        C:-Sodium carbonate
        D:-Nickel carbonate
        Correct Answer:- Option-B

Question79:-What is the reason for hard chromium deposit having milky appearance ?
        A:-Temperature too high
        B:-Temperature too low
        C:-Cooling too high
        D:-Cooling too low
        Correct Answer:- Option-A

Question80:-Which is the possible cause of non-deposition in chromium plating ?
        A:-Excess current
        B:-Temperature
        C:-Faulty contact
        D:-Good contacts
        Correct Answer:- Option-C

Question81:-The process of coating an oxide layer over a metal when anodic to give desirable decorative layer or for functional properties is called as
        A:-Galvanising
        B:-Anodising
        C:-Tinning
        D:-Sheradizing
        Correct Answer:- Option-B

Question82:-The maximum thickness of Hard Anodising is
        A:-40 μm to 60 μm
        B:-20 μm to 30 μm
        C:-10 μm to 20 μm
        D:-5 μm to 15 μm
        Correct Answer:- Option-A

Question83:-The oxide layer which grows both at aluminium/oxide interface and oxide/electrolyte interface is called as
        A:-Porous anodising
        B:-Colouring
        C:-Architectural anodising
        D:-Barrier anodising
        Correct Answer:- Option-D

Question84:-The process of building aluminium oxide on the surface of Aluminium article using sulfuric acid bath is also known as
        A:-Type I Anodising
        B:-Type II Anodising
        C:-Type III Anodising
        D:-None of the above
        Correct Answer:- Option-B

Question85:-The most suitable mixture for Sulphuric Chromic acid bath operation is
        A:-10% to 5%
        B:-5% to 15%
        C:-10% to 25%
        D:-20% to 20%
        Correct Answer:- Option-A

Question86:-Which process is used for colour effect on the unsealed anodised coatings ?
        A:-Stopping off
        B:-Lacquering
        C:-Dipping
        D:-Pickling
        Correct Answer:- Option-A

Question87:-Anodic coatings can be stripped out by immersing the articles in
        A:-Potassium Hydroxide
        B:-Sodium Hydroxide
        C:-Deoxidizer
        D:-All of the above
        Correct Answer:- Option-D

Question88:-To develop soft pastel shades and deep colours without metallic lustre on the dyed films, the anodising applied is
        A:-Acetic acid
        B:-Boric acid
        C:-Sulphuric acid
        D:-Chromic acid
        Correct Answer:- Option-D

Question89:-The white powdery "bloom" on the surface of the articles anodised in sulfuric acid is due to
        A:-Presence of grease on the article
        B:-No anodic film formed
        C:-Too high temperature or current density
        D:-Film formation prevented by entrapped air or gas pockets
        Correct Answer:- Option-C

Question90:-The correct method of sealing the anodised articles is
        A:-Nickel Acetate Solution
        B:-Dip in Cold Water
        C:-Nitric acid
        D:-Hydrochloric acid
        Correct Answer:- Option-A

Question91:-The test used to evaluate the corrosion resistance using a paste of cupric nitrate, ferric chloride, ammonium chloride and Kaolin on the electroplated
articles is
        A:-Corrodkote Test
        B:-Sulfur dioxide Test
        C:-BNF Test
        D:-Salt Spray Test
        Correct Answer:- Option-A

Question92:-BNF Jest test method is used for measuring ________ of plating of the articles.
        A:-Hardness
        B:-Base metal
        C:-Thickness
        D:-Weight
        Correct Answer:- Option-C

Question93:-The test developed for corrosion testing of zinc and cadmium coatings on steel is
        A:-Acetic acid salt spray test
        B:-Salt spray test
        C:-Sulfur dioxide test
        D:-Eddy current test
        Correct Answer:- Option-B

Question94:-The Anodic coating on Aluminium is tested by
        A:-Eddy current method
        B:-Stripping method
        C:-Calcium method
        D:-Salt spray method
        Correct Answer:- Option-A

Question95:-The most common method of testing the plating parts by its appearance, lustre, colour, surface defects finding is done by
        A:-Destructive method
        B:-X-ray fluorescence method
        C:-Magnetic Induction method
        D:-Visual Inspection method
        Correct Answer:- Option-D

Question96:-The method to find the discontinuities, cracks and voids on the electroplated articles is called as
        A:-Porosity test method
        B:-Coulometric method
        C:-Weight gain method
        D:-None of the above
        Correct Answer:- Option-A

Question97:-In salt spray test, the job is exposed to a mist of _________
        A:-Sodium hydroxide
        B:-Sodium chloride
        C:-Sodium carbonate
        D:-Sodium bicarbonate
        Correct Answer:- Option-B

Question98:-A quick pass/fail test to determine the adhesion of a coating is done by
        A:-Pull-off test
        B:-Cross-cut test
        C:-Scrape Adhesion test
        D:-Porosity test
        Correct Answer:- Option-B

Question99:-What is the standard adhesion test for coating ?
        A:-Permanent magnet gauge
        B:-X-ray fluoroscence
        C:-Pull off adhesion test
        D:-Stripping
        Correct Answer:- Option-C

Question100:-The common causes of porosity in coating parts is due to
        A:-Defects in the substrate surface
        B:-Insufficient thickness of the coating
        C:-Imperfect forming processes
        D:-All of the above
        Correct Answer:- Option-D