- (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
Chemical Engineering Mcqs
- (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 tip diameter should be equal to t (where, t = plate thickness to be welded)
- (C) In spot welding, two pieces to be joined are overlapped and placed between two electrodes
- (D) Mild steel sheet cannot be spot welded
- (A) Lead can creep under its own weight at room temperature
- (B) The electrical conductivity of gold is considerably reduced by alloying additions due to the decrease in electron movement
- (C) Recrystallisation temperature decreases with decrease in strain in a cold worked metal
- (D) With increase in temperature, the electrical conductivity of intrinsic semi-conductor will
- (A) Materials exhibiting high elasticity obey Hooke’s law
- (B) The elastic behaviour of rubber under compression is the same as its behaviour under tension
- (C) The damping capacity of a material is due to its plastic deformation
- (D) The stress required to cause plastic flow in polycrystalline material is higher as compared to monocrystalline materials due to the presence of grains of different orientations
- (A) Gas
- (B) Arc
- (C) Thermit
- (D) Resistance
- (A) Dryness
- (B) Moisture content
- (C) Coolness
- (D) Latent heat
- (A) Sulphur
- (B) Silicon
- (C) Lead
- (D) Phosphorous
- (A) Clamping methods
- (B) Electrodes
- (C) Current
- (D) Filler material
- (A) Chromium
- (B) Vanadium
- (C) Cobalt
- (D) Molybdenum
- (A) Power saving per unit weight of air delivered
- (B) Moisture elimination in the inter-stage cooler
- (C) Increased volumetric efficiency
- (D) All A ,
