Steels with high carbon equivalent have poor Weldability, because in these steels during welding________________?
(A) Carbon and other alloying elements get oxidised from the weld pool
(B) Excessive ferrite forms in the heat affected zone leading to poor toughness of the weld
(C) Martensite forms in the heat affected zone leading to poor toughness/ductility of the weld
(D) Segregation of carbon and other element occurs in the weld pool leading to poor properties of the weld
High endurance limit of carburised machine parts is because of the fact that carburisation __________________?
(A) Suppresses any stress concentration produced in the parts
(B) Enhances the yield point of the material
(C) Introduces a compressive layer on the surface
(D) Produces a better surface finish
“Encyclopaedia of Chemical Technology” has been ____________________?
(A) Authored by Kirk Othmer
(B) Edited by Perry and Chilton
(C) Edited by Kirk Othmer
(D) Authored by Perry and Chilton
Otto cycle used in spark ignition petrol engines is also known as the constant ________________ cycle?
(A) Volume
(B) Pressure
(C) Heat
(D) None of these
A material being tested for endurance strength is subjected to the _____________ load?
(A) Impact
(B) Completely reversed
(C) Dynamic
(D) Static & dynamic
_________________ is not used as a material of construction in thermocouples ?
(A) Alumel
(B) Rhodium
(C) Constantan
(D) Duralumin
A metal having a Poisson’s ratio = 0.3 is elastically deformed under uniaxial tension. If the longitudinal strain = 0.8, then the magnitude of thickness strain is________________?
(A) -0.8
(B) 0.8
(C) +0.08
(D) -0.24
For dynamic strain measurement, the Wheatstone bridge used is of ______________ type ?
(A) Voltage sensitive null
(B) Voltage sensitive deflected
(C) Current sensitive deflected
(D) None of these
The property of material, by which a given amount of energy is absorbed by it, without plastic deformation, is called__________________?
(A) Resilience
(B) Toughness
(C) Ductility
(D) Impact strength