Description : Pick out the correct statement. (A) Hot worked materials are subjected to annealing to remove internal stresses (B) Annealing of steel hardens it slightly (C) Normalising of a material induces stresses (D) Tempering of a material improves ductility & toughness but reduces hardness & brittleness
Last Answer : (D) Tempering of a material improves ductility & toughness but reduces hardness & brittleness Share
Description : Spheroidising of a material is a/an __________ process. (A) Normalising (B) Annealing (C) Tempering (D) Hardening
Last Answer : (B) Annealing
Description : Heating the Hypo-eutectoid steels to 30°C above the upper critical temperature line, soaking at that temperature and then cooling slowly to the room temperature to form a pearlite & ferrite structure is called (A) Tempering (B) Hardening (C) Annealing (D) Normalising
Last Answer : Option C
Description : __________ of hard alloy and tool steel is done to make it easily machinable. (A) Case carburising (B) Tempering (C) Normalising (D) Annealing
Last Answer : (B) Tempering
Description : Pick out the wrong statement. (A) Both annealing and normalising release the internal stresses of the material besides improving the mechanical properties (B) Low carbon steel does not respond to ... are also used for surface hardening (D) Martempering of a material is a hardening process
Description : Softening of hardened steel is done by its (A) Normalising (B) Tempering (C) Annealing (D) Carburising
Description : Post weld heat treatment is done by (A) Normalising (B) Stress relieving (C) Tempering (D) Solution annealing
Last Answer : (B) Stress relieving
Last Answer : (A) Normalising
Description : Sub zero treatment of steel is done to (A) Suppress martensite transformation (B) Enhance its working performance in sub zero atmosphere (C) Reduce the retained austenite in hardened steel (D) Induce temper brittleness after its hardening
Description : Case hardening of a material is (A) Followed by tempering or carburising (B) Preceded by its tempering (C) Done to get a soft ductile interior with a very hard surface (D) Carried out to get extreme hardness in its core
Last Answer : (D) Carried out to get extreme hardness in its core
Description : Which of the following mainly decides the current to be employed is arc welding? (A) Electrode size (B) Plate thickness (C) Voltage across the arc (D) Welded portion length
Last Answer : (A) Electrode size
Description : __________ is not a case hardening process. (A) Carburising (B) Nitriding (C) Cyaniding (D) Annealing
Last Answer : (D) Annealing
Description : Globular form of cementite is formed during the __________ process. (A) Spheroidising (B) Hardening (C) Annealing (D) Normalising
Last Answer : (B) Hardening
Description : The heat treatment process applied to cold formed steel parts is (A) Normalising (B) Tempering (C) Artificial ageing (D) Solution annealing
Last Answer : (D) Solution annealing
Description : Which of the following heat treatment processes is used for softening the hardened material? (A) Normalising (B) Tempering (C) Annealing (D) None of these
Description : The heat treatment process to which castings and the steel balls produced by cold heading are subjected is (A) Tempering (B) Normalising (C) Annealing (D) None of these
Last Answer : (B) Normalising
Description : . To improve the machinability of steel, it is generally subjected to (A) Spheroidising (B) Tempering (C) Normalising (D) Annealing
Last Answer : (A) Spheroidising
Description : Hardened steel is softened by (A) Normalising (B) Tempering (C) Annealing (D) Carburising
Description : Which of the following heat treatment processes is usually applied to castings? (A) Tempering (B) Annealing (C) Normalising (D) Carburising
Last Answer : (D) Carburising
Description : Machinability of hard alloys and tool steels is improved by (A) Spheroidising (B) Annealing (C) Tempering (D) Normalising
Last Answer : Option B
Description : o improve the machinability of steel, it is generally subjected to (A) Spheroidising (B) Tempering (C) Normalising (D) Annealing
Last Answer : Option A
Description : Between 230 and 370°C, blue brittleness is caused in mild steel because of the (A) Immobility of dislocation (B) Strain-ageing (C) Increase in Young's modulus (D) Strain hardening
Description : Which of the following processes follows the hardening process for reducing the hardening strains & increasing the toughness of the steel part? (A) Anodising (B) Tempering (C) Carburising
Description : Differentiate Hardening and Tempering of Automobile Parts.
Last Answer : Differentiate Hardening and Tempering: Parameter Hardening Tempering Definition Hardening or quenching is the process of increasing the hardness of a material. Tempering is the process of ... a metal tempering is done to reduce the brittleness of quenched metal or alloy.
Description : Cold worked steel parts are normally subjected to (A) Normalising (B) Hardening (C) Annealing (D) Shot peening
Last Answer : (C) Annealing
Description : Nitriding of steel is a process for (A) Case hardening (B) Spheroidising (C) Normalising (D) Annealing
Last Answer : (A) Case hardening
Description : The maximum thickness of the metal which can be welded using ultrasonic welding is __________ mm. (A) 0.5 (B) 3 (C) 10 (D) 25
Last Answer : (B) 3
Description : Chromium molybdenum steel cannot be welded using __________ welding. (A) Thermit (B) Electrical resistance (C) Oxy-acetylene (D) Any of these
Description : Welded joint strength increases due to annealing by i. 6% ii. 10% iii. 14% iv. None
Last Answer : i. 6%
Description : Pick out the wrong statement about cavitation. (A) Sudden reduction of pressure in a fluid flow system caused by flow separation, vortex formation or abrupt closing of valve leads to cavitation ... (D) Large scale cavitation cannot damage pipeline, restrict fluid flow and damage steam turbine blades
Last Answer : (D) Large scale cavitation cannot damage pipeline, restrict fluid flow and damage steam turbine blades
Description : Pick out the wrong statement. (A) Seam welding, projection welding & spot welding are the classification of electrical resistance welding (B) Electrode tip in spot welding is of copper and the ... joined are overlapped and placed between two electrodes (D) Mild steel sheet cannot be spot welded
Last Answer : (D) Mild steel sheet cannot be spot welded
Description : Stainless steel is welded using (A) Oxy-acetylene flame (B) Oxy-hydrogen flame (C) Arc welding (D) Inert gas arc welding
Last Answer : (D) Inert gas arc welding
Description : Oxygen cylinders used for autogenous (cutting/welding) purposes are (A) Seamless & made of steel (B) Heat treated before use (C) Made by sand casting (D) Welded steel cylinders
Description : Image P shows a portion of a larger photograph. Some operations have been done on that photograph using an image manipulation software. Image Q shows a portion of the resulting photograph. Identify ... D. Rotate clockwise by 90 degrees, flip horizontally, then rotate clockwise by 45 degrees
Last Answer : A C
Description : Rails in the field are generally welded by using a) Thermit welding b) Gas welding c) Electric arc welding d) Forge welding
Last Answer : a) Thermit welding
Description : Pick up the incorrect statement (A) The cross-sectional area of the welded member is effective (B) A welded joint develops strength of its parent metal (C) Welded joints provide rigidity (D) Welding takes more time than riveting
Last Answer : (D) Welding takes more time than riveting
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 : spare saw blade
Last Answer : Need Answer
Description : How often should circular saw blades be changed?
Last Answer : Turn off all power to the circular saw and remove the power cord from the wall outlet. Twist tie or tie off the cord to keep it out of the way while changing the blade,Slide up the protective blade ... aside. Remove the saw blade and place the new blade in its place. Replace the blade bolt and tigh
Description : Can saw blades be sharpened and how?
Last Answer : They can be sharpened with special files but it's best to get someone to do it for you.
Description : Tempering of steel is done to make it (A) Brittle (B) Hard (C) Rollable (D) Soft
Last Answer : (D) Soft
Description : Cross linked polymers formed from bi-and trifunctional groups in which cross-linkage in three dimensions via few chemical bonding across linear chains occur imparts to the polymer __________ properties. (A) Thermoplastic (B) Thermosetting (C) Elastometric (D) Brittleness
Last Answer : (C) Elastometric
Description : __________ are added in lacquers to remove film brittleness and to improve adhereness. (A) Film forming materials (B) Plasticisers (C) Diluents (D) Solvents
Last Answer : (B) Plasticisers
Description : Temper brittleness of a material can be fairly detected by the __________ test. (A) Fatigue (B) Notched bar impact (C) Tensile (D) Hardness
Description : __________ of grey cast iron produces white cast iron. (A) Tempering (B) Rapid heating (C) Rapid cooling (D) Slow cooling
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 : 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?*