The reason for excessive clinker formation in gas producers is the

During combustion of coal on grate, clinker formation is increased by the

A

Use of thick fire bed

B

Low fusion point of ash (

C

Use of preheated primary air

D

All of the above

Which of the following accentuates clinker-ing troubles on furnace grate burning coal?

A

Low reactivity of carbonised residue containing high proportion of iron & sulphur

B

Low forced draft & fuel bed temperature

C

Thick firebed and preheated primary air

D

All of the above

Cement clinker is reduced to fine size by a

A

Roll crusher

B

Ball mill

C

Tube mill

D

Hammer mill

On plain x-ray excessive callus formation is seen in

A

Pagetâs disease

B

Osteogenesis imperfecta

C

Renal osteodystrophy

D

Osteopetrosis

E

Hypervascular type of nonunion of bone

Excessive formation of lead sulphate on the surface of the plates happens because of

A

allowing a battery to stand in discharged condition for a long time

B

topping up with electrolyte

C

persistent undercharging

D

low level of electrolyte

E

all above

The density of a gas 'X' is twice that of another gas 'Y'. If the molecular weight of gas 'Y' is 'M'; then the molecular weight of the gas 'X' will be

A

2M

B

$$\frac{{\text{M}}}{2}$$

C

M

D

$$\frac{{\text{M}}}{4}$$

দুটি এক-পরমাণুক আদর্শ গ্যাস পরস্পরের সাথে তাপীয় সাম্যাবস্থায় আছে। A গ্যাস m ভরের অণু দ্বারা গঠিত, এবং B গ্যাস 4m ভরের অণু দ্বারা গঠিত। A গ্যাসের আয়তন ৪ গ্যাসের আয়তনের দ্বিগুণ। এদের চাপের অনুপাত PA / PB কত? (Two monoatomic ideal gases are in thermal equilibrium with each other. Gas A is composed of molecules with mass m while gas B is composed of molecules with mass 4m. The volume of gas A is twice that of gas B. What it the ratio of their pressures PA / PB ?)

A

1/4

B

1/2

C

1

D

2

The prices of the commodities ___ during the fuel crisis but the producers incurred ___ in profits .

A

increased / a downfall

B

shot up / an expansion

C

stabilized / a boon

D

fluctuated / a deprivation

Primary Producers fall in two categories e.g.

A

Indigotrops and Xylotrops

B

Numerotrops

C

Xylotrops

D

Phototrophs and Chemotrophs

The largest producers of coffee in the world is:

A

India

B

Brazil

C

China

D

USA

The reason for excessive clinker formation in gas producers is the

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