The approximate height of a blast furnace having a useful volume of 2000 m3 is about _______________ metres ?
(A) 25
(B) 35
(C) 55
(D) 75
Photographic plates are coated with _____________________?
(A) Silver nitrate
(B) Silver halide
(C) Calcium silicate
(D) Metallic silver
Air/fuel ratio by weight for combustion of methane with theoretical quantity of air will be about ____________________?
(A) 9 : 1
(B) 17 : 1
(C) 23 : 1
(D) 29 : 1
Which of the following gases cause global warming ?
(A) Carbon monoxide
(B) Carbon dioxide
(C) Nitrogen
(D) Ozone
Potable water means the water used for____________________?
(A) Fire-fighting
(B) Cooling
(C) Drinking
(D) Evaporation to produce steam
Softening of hardened steel is done by its____________________?
(A) Normalising
(B) Tempering
(C) Annealing
(D) Carburising
Transition from laminar flow to turbulent flow in fluid flow through a pipe does not depend upon the___________________?
(A) Length of the pipe
(B) Diameter of the pipe
(C) Density of the fluid
(D) Velocity of the fluid
Cold working of a material results in increase in hardness, which is termed as the ______________ hardening ?
(A) Cold
(B) Work
(C) Age
(D) Induction
Main constituent of bone ash is____________________?
(A) Ammonium phosphate
(B) Calcium phosphate
(C) Animal charcoal
(D) Ammonium sulphate
Isotropic materials have the same _______________________ in all directions?
(A) Induced stresses
(B) Density
(C) Elastic properties
(D) Thermal properties