‘Flare tower’ used in industry is meant for_____________________?
(A) Venting off (after burning) the excess inflammable/toxic gases at high pressure
(B) Absorbing the pollutant gases from the furnace exhaust
(C) Cooling of furnace exhaust gases
(D) None of these
The ratio of thermal & electrical conductivity is same for all the metals at the same temperature; and at around room temperature, this ratio is proportional to(where, T = absolute temperature, °K) ?
(A) T
(B) 1/T
(C) T2
(D) 1/T2
Common salt is produced from sea water in India generally by the ________________ method?
(A) Freeze drying
(B) Solar evaporation
(C) Electrolytic
(D) None of these
Which of the following phenomenon/ phenomena is/are diffusion controlled ?
(A) Dislocation climb
(B) Cross-slip
(C) Twinning
(D) Recrystallisation
Air/fuel ratio on molar (volume) basis for combustion of methane with theoretical quantity of air with be________________?
(A) 9.5 : 1
(B) 12.5 : 1
(C) 15.5 : 1
(D) 18.5 : 1
Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles (i.e., froth), which will hold the ore particles, but it does not affect the floatability of minerals. Which of the following is not used as a frother ?
(A) Cresylic acid
(B) Xanthaies
(C) Pine oil
(D) All A,
While the thermosetting polymers are amorphous in nature, the thermoplastic polymers are either amorphous or crystalline. The crystalline polymers are characterized by the ?
(A) Low impact strength
(B) High flexibility
(C) Better finish and surface appearance
(D) High plastic deformation
______________ the exhaust gas is an indication of the incomplete combustion of fuel?
(A) Low temperature of
(B) High temperature of
(C) High % of CO in
(D) High % of CO2 in
Which of the following terminology is used for the temperature at which new grains are formed in a metal ?
(A) Eutectic temperature
(B) Lower critical temperature
(C) Recrystallisation temperature
(D) Upper critical temperature
In ________________ process, there is an increase in entropy with no degradation of energy ?
(A) Isothermal expansion
(B) Isochoric heat addition
(C) Polytropic expansion
(D) Isobaric heat addition