B. stationary<fire tube-type

C. natural cirulation type

D. horizontal type

E. internally fired type

A. water is converted into steam in one pass without any recirculation

B. feed pump is employed to supplement natural circulation in water wall type furnace

D. heating takes place at bottom and the water supplied at bottom gets converted into the mixture of stdam bubbles and hot water which rise to durm

E. water is fed under high pressure and high velocity

A. cooling the oil in the settling tanks

B. burning the oil

D. suspension

E. filtering

A. vertical fire tube type

C. horizontal fire tube type

D. horizontal water tube type

E. vertical water tube type

B. any one of the above

C. none of the above

D. forced draft fan and chimney

E. induced draft fan and chimney

B. none of the above

C. temperature of steam in C

D. tonnes/hr. of steam

E. pressure of steam in kg/cm2

A. flat characteristic

B. lihear characterisstic

C. none of the above

E. rising characteristic

A. water

B. dry steam

C. supersaturated steam

D. wet steam

B. babcock and wilcox boiler

C. cochran boiler

D. stoker fired boiler

E. pulverised fuel fired boiler

A. check level of water in boiler drum

C. recirculate unwanted feed water

D. none of the above

E. regulate flow of boiler water

B. babcock and wilcox boiler

C. benson boiler

D. cochran boiler

E. lancashire boiler

A. heat is transferred by bleeding some gases from furnace

B. from heating an itermediate material and then heating the air from this material

D. none of the above

E. by direct mixing ,

A. 1 kg/cm2

B. 100 kg/cm2

C. 170 kg/cm2

E. below atmospheric pressure

A. high calorific value

B. ecomomical

C. ease in storing

E. produce minimum smoke and gases

A. half

B. three

D. two

E. one-fourth

A. measuring oxygen in flue gases

B. measuring temperature of flue gases at exit of furnace

C. smoky chimney exit

D. excess air in flue gases

A. dry

B. superheated

C. saturated

D. supersaturated

A. clean the nozzles

B. reduce flame length

C. aid in proper combustion

E. keep the burner tips cool

A. more

B. equal

D. could be more or less depending on the size of plant

E. none of the above

A. radiation and convection

B. convection

D. conduction

E. radiation and conducton

A. 218 kg/cm2 abs and 540C

B. 100 kg/cm2 and 540C

C. 1 kg/cm2 and 100C

D. 100 kg/cm2 abs and 373C

B. the exact analysis

C. its type

D. the content of ash and heating value

E. the content of sulphur

A. less

B. less or more depending on size of boiler

D. same

E. unpredictable

A. linear characterisstic

B. none of the above

C. drooping characteristic

D. flat characteristic

A. copper

B. aluminium

C. iron

D. nickel

A. remains unchanged

B. increases

D. increases/decreases depending on steam temperature requirements

E. unpredictable

A. 1 + moisture content

B. (1 + moisture content)

D. 1 moisture content

A. chimney

C. induced draft fan

D. smoke meter

E. pulveriser

A. inject chemical solution in feed pump

B. none of the above

D. add make up water in the system

E. create vacuum

A. all the three above plus gas cycle efficiency

B. regenerative cycle efficiency

D. rankine cycle efficiency

E. carnot cycle efficiency

A. high calorific value coal being burnt

C. raising of steam temperature

D. leakage of air

E. higher effectiveness of boiler

A. boiler evaporative capacity

B. boiler effectiveness

C. factor of evaporation

D. equivalent evaporation

A. increase *heat transfer rate

B. increase efficiency-of thermal power plant

C. reduce hardness and for removal of solids

D. all of the above

E. increase steam parameters

A. avoid explosion in furnace

B. prevent atmospheric air leaking into furnace

D. support furnace freely from top

E. prevent leakage of hot flue gases

A. corroding air heaters

C. causing clinkering and slagging

D. spontaneous combustion during coal storage

E. facilitating ash precipitation

A. increases

B. none of the above

C. remains same

D. behaves unpredictably

A. all the fuel burns instantaneously producing high energy release

B. none of the above

C. explosion in furnace

D. fuel burns with less air

A. to provide proper conditions for con-tinuous complete combustion

C. mix fuel with air and ignite

D. maintain heat supply to prepare and ignite the incoming fuel

E. to minimise radiation losses

A. none of the above

C. proper ignition temperature

D. 02 to support combustion

E. correct fuel air ratio

B. water is supplied in drum and through down-comers located in atmospheric condition it passes to the water wall and rises to drum in the form of mixture of water and steam

C. heating of water takes place in stages

D. water is converted into steam in one pass without any recirculation

E. heating takes place at bottom and the water supplied at bottom gets converted into the mixture of steam bubbles and hot water which rise to drum

B. none of the above

C. by direct mixing

D. from a metal wall from one medium to another

E. heat is transferred by bleeding some gas from furnace

A. chimney

B. induced draft fan

C. both combined A. and B.

E. none of the above

A. 85-90%

C. 81-85%

D. 95-100%.

E. 90-95%

A. outside diameter and inside diameter

C. inside diameter and thickness

D. mean diameter and thickness

E. outside diameter alone

A. equal

B. more

C. may be more or less depending on capacity of reheater

E. none of the above

A. burnt in excess air

B. burnt as lumps

D. burnt as powder

E. heated sufficiently

A. corrosion

B. carryover

C. scale

D. embrittlement

A. 2 cm

B. 15 cm

C. 12 cm

E. 8 cm

A. 100C

C. above wet bulb temperature of flue gases

D. less than wet bulb temperature of flue gases

E. below dew-point temperature of flue gases

B. heat consumed in evaporating 1 kg water at 0C to steam at 100C and 1.033 kg/cm pressure

C. steam evaporation rate per kg of fuel fired

D. work done by 1 kg of steam at saturation condition

E. work done in evaporating 1 kg of steam per hour from and at 100C into dry saturated steam