One kilogram of water at 0°C is changed to superheated steam of one atm pressure and 300° C. The major heat consumption in the process will be to

heat the water from 0°C to 100°C.

data insufficient, can't be predicted

In a heat exchanger with steam outside the tubes, a liquid gets heated to 45°C, when its flow velocity in the tubes is 2 m/s. If the flow velocity is reduced to 1 m/s, other things remaining the same, the temperature of the exit liquid will be

initially decreases and remains constant thereafter.

Sensible heat absorbed by 1 lb of water when it is heated from 32 to 212°F may be around __________ BTU.

data insufficient, can't be predicted

Explore topic-wise MCQs in Chemistry.

This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.

1.	Three material A, B and C of equal thick-nes and of thermal conductivity of 20, 40 & 60 kcal/hr. m. °C respectively are joined together. The temperature outside of A and C are 30°C and 100°C respectively. The interface between B and C will be at a temperature of __________ °C.
A.	40
B.	80
C.	70
D.	90
Answer» D. 90

Discussion

2.	Correction is applied to LMTD for __________ flow
A.	parallel
B.	cross
C.	counter
D.	none of these
Answer» C. counter

Discussion

3.	One kilogram of water at 0°C is changed to superheated steam of one atm pressure and 300° C. The major heat consumption in the process will be to
A.	evaporate the water.
B.	heat the water from 0°C to 100°C.
C.	to superheat the steam.
D.	data insufficient, can't be predicted
Answer» B. heat the water from 0°C to 100°C.

Discussion

4.	The heat transfer co-efficient in film type condensation is __________ that for dropwise condensation
A.	greater than
B.	lower than
C.	half
D.	is same as
Answer» C. half

Discussion

5.	In a heat exchanger with steam outside the tubes, a liquid gets heated to 45°C, when its flow velocity in the tubes is 2 m/s. If the flow velocity is reduced to 1 m/s, other things remaining the same, the temperature of the exit liquid will be
A.	more than 45°C
B.	equal to 45°C
C.	initially decreases and remains constant thereafter.
D.	less than 45°C
Answer» B. equal to 45°C

Discussion

6.	A wall has two layers of materials A and B; each made of a different material. Both the layers have the same thickness. The thermal conductivity of materialA is twice that of B. Under the equilibrium, the temperature difference across the wall is 36°C. The temperature difference across the layer A is __________ °C.
A.	12
B.	14
C.	18
D.	6
Answer» B. 14

Discussion

7.	Sensible heat absorbed by 1 lb of water when it is heated from 32 to 212°F may be around __________ BTU.
A.	970
B.	data insufficient, can't be predicted
C.	3.97
D.	180
Answer» E.

Discussion

Explore topic-wise MCQs in Chemistry.

Three material A, B and C of equal thick-nes and of thermal conductivity of 20, 40 & 60 kcal/hr. m. °C respectively are joined together. The temperature outside of A and C are 30°C and 100°C respectively. The interface between B and C will be at a temperature of __________ °C.

Correction is applied to LMTD for __________ flow

One kilogram of water at 0°C is changed to superheated steam of one atm pressure and 300° C. The major heat consumption in the process will be to

The heat transfer co-efficient in film type condensation is __________ that for dropwise condensation

In a heat exchanger with steam outside the tubes, a liquid gets heated to 45°C, when its flow velocity in the tubes is 2 m/s. If the flow velocity is reduced to 1 m/s, other things remaining the same, the temperature of the exit liquid will be

Sensible heat absorbed by 1 lb of water when it is heated from 32 to 212°F may be around __________ BTU.