Which of the following variables affects the furnace capacity ?
(A) Temperature of flue gas
(B) Thermal conductivity of stock
(C) Thickness of heating stock
(D) All
The range of Mho’s scale of hardness is from________________?
(A) 1 to 15
(B) 1 to 8
(C) 1 to10
(D) 0 to 10
Aluminium storage vessel can be used to store________________?
(A) Aqua regia
(B) Ferrous sulphate
(C) Hydrochloric acid (10%)
(D) None of these
Which of the following alloys does not contain nickel ?
(A) Chlorinet – 2 alloy
(B) Monel
(C) Inconel
(D) Babbitt metal
Carbon percentage in medium carbon steel is around__________________?
(A) 0.1 to 0.35
(B) 0.35 to 0.5
(C) 0.8 to 1.4
(D) 1 to 1. 5
Which of the following heat treatment processes is used for softening the hardened material ?
(A) Normalising
(B) Tempering
(C) Annealing
(D) None of these
Interchain forces are the weakest in case of________________?
(A) Plastics
(B) Fibres
(C) Elastomers
(D) Both rubber & elastomers
In salt bath furnace, heat is transferred to the charge mainly by __________________?
(A) Conduction
(B) Convection
(C) Radiation
(D) None of these
An example of shaft furnace is the__________________?
(A) L.D. converter
(B) Glass melting tank
(C) Blast furnace
(D) Soaking pit