Description : What are the recognized systems for pre heating of rails ends for AT Welding? (i) Oxygen –LPG & Compressed air petrol both* (ii) Only Oxygen –LPG (iii) Only Compressed air petrol both (iv) both are correct
Last Answer : ) Oxygen –LPG & Compressed air petrol both*
Description : What is Pre Heating Temperature of rail ends in AT Welding? (i) 300 ± 20oC (ii) 400 ± 20oC (iii) 500 ± 20oC (iv) 600 ± 20oC *
Last Answer : (iv) 600 ± 20oC *
Description : Name the material which is separated from molten steel during chemical reaction of A.T welding? (i) Aluminium oxide (slag). * (ii) Ferrous Oxide (iii) Aluminium (iv) Ferrous
Last Answer : (i) Aluminium oxide (slag). *
Description : Weather protection of track is required during block for execution of AT Welding? (i) Yes.* (ii) No (iii) As decided by site supervisor (iv) As per site condition
Last Answer : (i) Yes.*
Description : How many detonators are planted during protection of track for welding site ? (i) One (ii) Two (iii) Three* (iv) None of the above
Last Answer : iii) Three*
Description : Last flag man is deputed at which distance from last detonator during protection of welding site . (i) 30 mts (ii) 50 mts (iii) 45 (iv) 60 mts
Last Answer : (iv) 60 mts
Description : Weather date of welding is marked on weld? (i) Yes (ii) As decided by the site supervisor (iii) No* (iv) None of the above
Last Answer : (iii) No*
Description : Weather traffic block is required for execution of AT Welding? (i) Yes.* (ii) No (iii) As decided by site supervisor (iv) As per site condition
Last Answer : (i) Yes.
Description : If code of a fracture is OFW-422 then it means. (i) AT welding with transverse crack. (ii) Flash butt welding with transverse crack. (iii) At welding with horizontal crack.* (iv) None of the above.
Last Answer : (iii) At welding with horizontal crack.*
Description : In AT welding process what is the role of asbestos powder & slag ? (i) To separate closing pin from portion* (ii) To hold the portion (iii) Both above are correct (iv) None of the above
Last Answer : (i) To separate closing pin from portion*
Description : In AT welding process what is the role of closing pin ? (i) To hold the portion before melt (ii) To hold the asbestos powder & slag (iii) Both above are correct* (iv) None of the above
Last Answer : (iii) Both above are correct*
Description : What is the testing frequency of new AT weld ? (i) Just after the welding (ii) After 7 days of welding (iii) With in the one month of welding* (iv) None of the above
Last Answer : iii) With in the one month of welding*
Description : In how many time final grinding should be done of new AT weld ? (i) Just after the welding (ii) After 8 hrs of welding (iii) With in 24 hrs* (iv) None of the above
Last Answer : iii) With in 24 hrs*
Description : In how many time rough riding should be done of new AT weld ? (i) Just after the welding* (ii) After 8 hrs of welding (iii) After 24 hrs (iv) None of the above
Last Answer : i) Just after the welding*
Description : Ist detonator is planted at a distance of (i) 1200 Mt. from welding site .* (ii) 600 mtrs from welding site (iii) 30 mtrs from welding site (iv) None of the above
Last Answer : (i) 1200 Mt. from welding site .*
Description : Banner flag is planted at a distance of (i) At the site of work (ii) At 1200 mtrs from welding site (iii) At 30 mtrs from welding site (iv) 600 Mt. from welding site .*
Last Answer : iv) 600 Mt. from welding site .
Description : Rails used for A T Welding shall not normally be welded? (i) 20 years old . (ii) 30 years old (iii) 40 years old (iv) 50 years old*
Last Answer : iv) 50 years old*
Description : Name the paint used in A.T. Welding painting? (i) Black Paint (ii) Bituminous black IS:9862-1981.* (iii) Any type of black paint (iv) None of the above
Last Answer : (ii) Bituminous black IS:9862-1981.*
Description : When was the collar painting done ? (i) After the welding * (ii) after one week of welding (iii) After 15 days of welding (iv) None of the above
Last Answer : (i) After the welding *
Description : What will happen if slag is not used above the layer of asbestos powder? (i) Auto tapping* (ii) High welding (iii) Low welding (iv) Nothing will happen
Last Answer : (i) Auto tapping*
Description : Which gauge is used to measure the height of rail at the time of aligning of rails for AT welding? (i) Height gauge.* (ii) Vertical gauge (iii) Horizontal gauge (iv) As decided by site supervisor
Last Answer : (iv) As decided by site supervisor
Description : After AT Welding First train is to be passed after ? (i) 20 Minutes from pouring of weld metal. (ii) 35 Minutes from pouring of weld metal. (iii) 30 Minutes from pouring of weld metal.* (iv) 25 Minutes from pouring of weld metal.
Last Answer : (iii) 30 Minutes from pouring of weld metal.*
Description : Type of competency certificate issued after TW-1 course? (i) Competency for two years (ii) Provisional competency.* (iii) Competency for six months (iv) Competency to do welding independently
Last Answer : (ii) Provisional competency.*
Description : Where Portion sample tests(test piece) should be conducted? (i) At desire by RDSO (ii) At Zonal CMT’s organisation or the Flash Butt Welding plant. * (iii) In RDSO campus (iv) As decided by in charge of the plant
Last Answer : At Zonal CMT’s organisation or the Flash Butt Welding plant.
Description : How rejected portion are to be disposed-off? (i) By Igniting 5 Portions at a time in pit away from store?* (ii) By throwing them away (iii) By dispose off in a pit (iv) By using it in Branch/Yard lines for welding
Last Answer : (i) By Igniting 5 Portions at a time in pit away from store?*
Description : In new Rail as well as second hand rails how much end bends of the rails in vertical are permitted when checked with one meter straight edge before welding? (i) +0.5mm, -0 mm in vertical * (ii) +0.2mm, -.3 mm in vertical (iii) +0.3mm, -2 mm in vertical (iv) 0 mm, +.5 mm in vertical
Last Answer : (i) +0.5mm, -0 mm in vertical *
Description : Pressure of Oxygen during pre-heating shall be? (i) 4.0 – 5.0 kg/ sq cm (ii) 5.0 – 6.0 kg/ sq cm (iii) 6.0 – 7.0 kg/ sq cm (iv) 7.0 – 8.0 kg/ sq cm *
Last Answer : (iv) 7.0 – 8.0 kg/ sq cm *
Description : ressure of LPG during pre-heating shall be? (i) 2.0 - 2.5 kg/ sq cm (ii) 2.0 - 2.5 kg/ sq cm (iii) 2.0 - 2.5 kg/ sq cm* (iv) 2.0 - 2.5 kg/ sq cm
Last Answer : (iii) 2.0 - 2.5 kg/ sq cm*
Description : Defect of lack of fusion is mainly due to? (i) Improper heating.* (ii) Improper Gap (iii) Improper grinding (iv) None of above
Last Answer : (i) Improper heating.*
Description : Heating time with compressed air and petrol in SPW is ? (i) 4.0 to 4.5 minutes.* (ii) 4.0 to 5 minutes (iii) 5.0 to 5.5 minutes (iv) 5.5 to 6 minutes
Last Answer : (i) 4.0 to 4.5 minutes.*
Description : Defect of Blow holes is due to? (i) Slag (ii) Moisture* (iii) Lack of heating (iv) Extra heating
Last Answer : (ii) Moisture*
Description : What is the heating time in OXY & LPG in SPW? (i) 2.0 - 3.5 minutes. (ii) 2.0 - 3.0 minutes. (iii) 2.0 - 2.5 minutes.* (iv) 3.0 - 4.5 minutes.
Last Answer : iii) 2.0 - 2.5 minutes
Description : In new Rail as well as second hand rails how much end bends of the rails in lateral direction are permitted when checked with one metre straight edge before welding? (i) ± 0.2 mm in lateral direction (ii) ± 0.3 mm in lateral direction (iii) ± 0.5 mm in latera
Last Answer : (iii) ± 0.5 mm in latera
Description : Normal Reaction time in SPW technique? (i) 17 ± 3 seconds. (ii) 15 ± 3 seconds (iii) 23 ± 3 seconds (iv) 20 ± 3 seconds*
Last Answer : (iv) 20 ± 3 seconds*
Description : hat action to be taken if slag is not separated within 20 ± 3 seconds? (i) Tap inside. (ii) Tap outside * (iii) Good reaction (iv) Tap well in time
Last Answer : ii) Tap outside *
Description : In the fluid catalytic cracker (FCC), the cracking reaction is __________ (i) and the regeneration is__________ (ii) __________. (A) (i) exothermic (ii) endothermic (B) (i) exothermic (ii) exothermic (C) (i) endothermic (ii) endothermic (D) (i) endothermic (ii) exothermic
Last Answer : (D) (i) endothermic (ii) exothermic
Description : During periodic testing of an AT weld with 700 probe, a bunch of moving signals of less than 40% but more than 10% is observed in the head of weld, the joint will be. (i) Good joint.* (ii) DFWR (iii) DFWO (iv) OBSW
Last Answer : i) Good joint.*
Description : For rolling mark 60 kg/Sail/X/2010 the first testing in the field after initial testing of rails in rail manufacturing plant, will be done. (i) After test free period of 25%. (ii) After passage of every 40 ... period.* (iii) After passage of 200 GMT. (iv) On the basis of annual GMT of the section.
Last Answer : (ii) After passage of every 40 GMT traffic during test free period.*
Description : Defect of High joint is due to ? (i) Early trimming of weld (ii) Excess provision of height during alignment.* (iii) Early grinding of weld (iv) None of above
Last Answer : (ii) Excess provision of height during alignment.
Description : Defect of low joint is due to? (i) Excess height (ii) Early trimming of weld (iii) Early grinding of weld (iv) Nil/Less provision of height during alignment.
Last Answer : (iv) Nil/Less provision of height during alignment.
Description : Min. breaking load of 60kg weld during transverse breaking load test is? (i) 110 MT (ii) 115 MT* (iii) 90 MT (iv) 120 MT
Last Answer : (ii) 115 MT*
Description : Min. breaking load of 52kg weld during transverse breaking load test is? (i) 90MT* (ii) 100 MT (iii) 110 MT (iv) 120 MT
Last Answer : (i) 90MT*
Description : Minm. deflection during transverse breaking load test is? (i) 5 mm (ii) 10 mm (iii) 15 mm* (iv) 20 mm
Last Answer : (iii) 15 mm*
Description : Pressure of compressed air is kept during preheating by CAPS? (i) 1 to 2 kg/cm2 (ii) .1 to .2 kg/cm2 (iii) 2 to 3 kg/cm2 (iv) 0.2 to 0.3 kg/cm2*
Last Answer : (iv) 0.2 to 0.3 kg/cm2*
Description : Total no. of probes fitted on digital double rail tester for rail testing are (i) 12 (ii) 8 (iii) 14* (iv) 16.
Last Answer : (iii) 14*
Description : No of Ingredient of Portion are? (i) Five. (ii) Six (iii) Seven* (iv) Eight
Last Answer : (iii) Seven*
Description : Function of Calcium fluoride/flour spar in portion is? (i) To separate slag* (ii) To separate aluminum (iii) To separate ferrous (iv) No separation
Last Answer : (i) To separate slag*
Description : Early tapping will cause defect of? (i) No defect (ii) Inclusion of slag* (iii) Inclusion of aluminium (iv) Inclusion of ferrou
Last Answer : (ii) Inclusion of slag*
Description : How much rail ends are cleaned with Kerosene Oil and steel wire brush? (i) Minimum 100 mm both side (ii) Minimum 50 mm both side.* (iii) No need (iv) As decided by site supervisor
Last Answer : (ii) Minimum 50 mm both side.*
Description : During decomposition, energy is absorbed in the form of heat, light or electricity for breaking down the reactants which is known as: (a) exothermic reaction (b) endothermic reaction (c) reduction reaction (d) oxidation
Last Answer : (b) endothermic reaction