A. Reduce primary air requirement

B. Dry the coal

C. Transport the coal to the burner

A. Minimising the number of joints in the structure

B. Producing monolithic linings

D. Patch work

A. 25000 kcal/kg

C. 8800 kcal/m3

D. Same as that of coal middling

B. Pulverised coal in boilers

C. Less air for combustion

D. Correct amount of air for combustion

A. Develop stable mineral forms in them

B. duct

D. Dehydrate the dried refractory

E. Form ceramic bonds necessary for development of high crushing strength in the finished

B. Fireclay bricks

C. Both A. & B.

D. Neither A. nor B.

B. 5

C. 55

D. 75

A. High density

B. High thermal conductivity

C. Low porosity

A. Cooling down

B. Warming up

D. Neither A. nor B.

A. Light oil and pitch

B. Anthracene and crecosote oil

D. Solar oil and pitch

B. B.F. gas and coke oven gas

C. Sewage gas and gobar gas

D. Propane and LPG

A. 0.1 to 2

B. 10 to 100

C. 2 to 10

A. Roof of open hearth furnace

C. Dome of blast furnace stoves

D. By-product coke ovens

A. Electromagnetic pump

B. Centrifugal pump

D. Gear pump

B. Dome and upper portion of B.F. stoves

C. Coke oven walls

D. Open hearth furnace roof

A. Rotameter

C. Venturimeter

D. Flow nozzle

A. Strength

B. Abrasion resistance

D. Neither A. nor B.

A. Decreases in the downstream direction

C. Is independent of the area of flow

D. Is constant

B. May increase or decrease

C. Decreases

D. Remain same

A. Cristobalite

B. Tridymite

D. All have the same specific gravity

A. > 1

B. 1

D. 0

B. Transforms to other allotropic forms i.e. Tridymite and Cristobalite involving very high

C. Is not stable at high temperature

D. Mainly contains quartz

E. ume changes

A. A disturbance travelling upstream in moving fluid

B. None of these

C. Flow in an open channel

A. Leakage & pressure decreasing at higher elevations

B. Specific gravity & temperature of the liquid

C. Frictional resistance through pipes, fittings & passages

A. Zirconia

B. Magnesite

D. Silica

A. Incompressible

B. Non-viscous

D. Neither A. nor B.

B. None of these

C. Fannings

D. Hagen-Poiseuilles

B. Hearth bottom of blast furnace

C. Coke oven walls

D. Coke ovens regenerator

A. Superduty fireclay

B. Chromite

D. None of these

B. 50

C. 100

D. 5

B. Al2O3. SiO2

C. Al2O3. 2SiO2

D. 2Al2O3. 3SiO2

A. Inertial

C. Surface tension

D. Gravity

A. f1 < f2

B. Data not sufficient to relate f1 & f2

C. f1 = f2

B. Composition

C. Firing temperature

D. Texture

B. V

C. V-1

D. V-0.8

B. Pressure-co-efficient

C. Froude number

D. Weber number

A. Due to the motion of conducting fluid through an externally generated uniform field

B. Proportional to the fluid velocity

D. Neither A. nor B.

A. Electric furnaces

C. Basic open hearth furnace

D. Basic Bessemer converter

A. Non-isothermal condition of

B. Compressible

C. Both A. and B.

B. Centrifugal pump

C. Axial flow pump

D. Reciprocating pump

B. Firing temperature

C. Composition

D. Texture

A. Low thermal conductivity

C. Low heat capacity

D. High insulating properties

A. ? ?Q

B. ? Q

D. ? Q2

A. Green strength

B. Voids

C. Shrinkage

A. Atmospheric air

B. Water

C. None of these

A. Are wetted by molten iron

B. Are acidic in nature

D. All A., B. and C.

A. Are used in outer lining of L.D. converters

C. Are stored under controlled temperature & humidity to avoid hydration

D. Have poorer hydration resistance than pitch bonded bricks

A. 64/Re

B. 32?LV/gc.D2

D. f (L/D) (v2/2gc). ?

A. 100

C. 2000

D. 10

A. Irrotational

B. Viscous

D. Incompressible