A form of stress corrosion failure termed as ‘season cracking’ is generally observed in __________________?
(A) Thermosetting polymers
(B) High carbon steels
(C) Brasses
(D) Borosilicate glasses
Velocity of a gas in sound is not proportional to (where, T = Absolute temperature of the gas. P = Absolute pressure of the gas. y = Ratio of specific heats (Cp/Cv) ρ = specific weight of the gas) ?
(A) √T
(B) 1/√P
(C) √y
(D) 1/√ρ
Hot & cold working of material causes its _______________ deformation?
(A) Visco-elastic
(B) Isotropic
(C) Elastic
(D) Plastic
Thermit welding is categorised as the ______________________ welding ?
(A) Forge
(B) Fusion
(C) Resistance
(D) Arc
Work hardenable alloy steel used to make the bucket wheel excavators, blades of bulldozers and other earth moving equipments contain iron, carbon and ___________________?
(A) Manganese
(B) Silicon
(C) Nickel
(D) Chromium
As per the Indian boiler regulation (IBR), the type of joint preferred for the circumferential joint is the _____________ joint ?
(A) Butt
(B) Lap
(C) Welded
(D) None of these
Often earing defects are found during deep drawing operation, because the __________________?
(A) Surface finish of the sheet is poor
(B) Sheet material has been given substantial spring back
(C) Starting sheet has planer anisotropy due to its texture
(D) Starting sheet has normal anisotropy due to its texture
Plants produce carbohydrates from the CO2 present in the atmosphere by_________________?
(A) Polymerisation
(B) Photochemical reaction
(C) Oxidation
(D) None of these
_______________ is not a case hardening process ?
(A) Carburising
(B) Nitriding
(C) Cyaniding
(D) Annealing
Calorific value of ____________________ are almost same?
(A) Lignite & anthracite coal
(B) Lignite & coal gas
(C) Petrol & diesel
(D) Coal gas & natural gas