Eutectoid composition of carbon steel at room temperature is___________________?
(A) Cementite
(B) Pearlite
(C) Martensite
(D) Ferrite
The refrigerant freon-12 is chemically_______________________?
(A) CCl2F2
(B) CCl3F
(C) CClF3
(D) CCl4F
Water-tube boiler is the one, in which _____________________?
(A) Water passes through tubes and flue gases around it
(B) Tube carrying hot flue gases are immersed in a pool of water
(C) Tubes are placed in vertical position
(D) None of these Answer: Option A
Ferromagnetic materials owe their properties to __________________ inner sub-shells ?
(A) Completely filled
(B) Partially filled
(C) Equally filled
(D) Vacant
The yield point phenomenon observed in annealed low carbon steel is due to the presence of the following element ?
(A) Silicon
(B) Carbon
(C) Phosphorous
(D) Chromium
_______________ is the trade name assigned to a non-ferrous cast alloy composed of cobalt, chromium & tungsten ?
(A) Stellite
(B) High speed steel
(C) Cermet
(D) Alnico
Runge-Kutta method is used to solve a/an __________________________?
(A) Ordinary differential equation of nth order
(B) Simultaneous non-linear equation
(C) Linear differential equation
(D) None of these
Machinability of hard alloys and tool steels is improved by_____________________?
(A) Spheroidising
(B) Annealing
(C) Tempering
(D) Normalising
Which of the following is a commonly used manometric liquid for low pressure range ?
(A) Ethyl alcohol
(B) Carbon tetrachloride
(C) Glycerol
(D) Ethylene glycol
_______________ has a negative co-efficient of linear expansion?
(A) Iron
(B) Copper
(C) Rubber
(D) Nickel