The equivalent evaporation is defined as

Consider the following statements with reference to evaporation : 1. Rate of evaporation decrease with an increase in surface area. 2. Rate of evaporation increases with an Increase in temperature. 3. Rate of evaporation decreases with an increase in humidity. 4. Rate of evaporation increases with an increase in wind speed. Which of the above statement are correct?

A

1, 2 and 4 only

B

1, 3 and 4 only

C

2, 3 and 4 only

D

1, 2, 3 and 4

Steam economy is defined as the amount of evaporation per unit amount of steam used, while the capacity is the total evaporation obtained per hour. Use of multiple effect in evaporation

A

Increases capacity

B

Increases economy

C

Does not affect the capacity

D

Both B & C

Which among the following are the factors affecting Evaporation? 1. the rate of evaporation increases with an increase of surface area. 2. the rate of evaporation increases with a an increase in humidity.

A

1 only

B

2 only

C

Both 1 and 2

D

Neither 1 nor 2

Which of the following option is NOT correct about the rate of evaporation? The rate of evaporation decreases with increasing the surface area of the liquid. The rate of evaporation increases by decreasing the temperature of the liquid.

A

Only 1 is correct

B

Only 2 is correct

C

Both are correct

D

Both are incorrect

Consider the following statements.
1. When evaporation takes place, cooling takes place.
2. Evaporation takes place at all temperature, boiling takes place only at the boiling point.
3. Evaporation is a surface phenomenon.
Which of the statements given above is/are true?

A

Only 1

B

1 and 2

C

2 and 3

D

1, 2 and 3

Equivalent evaporation of water is the evaporation for a feed water supply at 100°C

A

And its corresponding conversion into dry saturated steam at 100°C and 1.033 kg/cm²

B

And its corresponding conversion into dry steam at desired boiler pressure

C

Conversion into steam at atmospheric condition

D

Conversion into steam at the same pressure at which feed water is supplied

If beginning work in process equivalent units are 2500 units, work done in current period equivalent units are 3800 units and ending work in process equivalent units are 5000, then complete equivalent units in current period are

A

1800 units

B

1500 units

C

1300 units

D

1500 units

The equivalent evaporation is defined as?

A

the ratio of heat actually used in producing the steam to the heat liberated in the furnace

B

the amount of water evaporated or steam produced in kg of fuel burnt

C

the amount of water evaporated from and at 100 degree C into dry & saturated steam

D

none of the mentioned

Identify the correct set. Set Physical Changes Chemical Changes A Ozone formation from Oxygen, Condensation Rusting, Burning of candle B Evaporation, Alloy formation Rusting, Curd formation C Condensation, Evaporation Combustion, Galvanization D Galvanization, Alloy formation Crystallization, Condensation

A

B

C

D

Which row of the following table correctly matches the terms with the respective processes of state-change? Change of State Gas to liquid Liquid to solid Solid to liquid 1. Condensation Melting Solidification 2. Condensation Solidification Melting 3. Evaporation Melting Solidification 4. Evaporation Solidification Melting

A

1

B

2

C

3

D

4

The equivalent evaporation is defined as

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