Chemical Heat Transfer

The number of kg vaporised per kg of steam fed to the evaporator is defined as____________?

Byadmin March 3, 2019August 24, 2021

The number of kg vaporised per kg of steam fed to the evaporator is defined as____________?

A. Capacity
B. Rate of evaporation
C. Economy
D. Rate of vaporisation

Chemical Heat Transfer

Heat transfer by conduction in the turbulent core of a fluid flowing through a heated pipe is negligible, if the value of Prandtl number is_______________?

Heat transfer by conduction in the turbulent core of a fluid flowing through a heated pipe is negligible, if the value of Prandtl number is_______________?

A. 0.2
B. 0.4
C. 0.6
D. 0.8

Read More Heat transfer by conduction in the turbulent core of a fluid flowing through a heated pipe is negligible, if the value of Prandtl number is_______________?
Chemical Heat Transfer

In a shell and tube heat exchanger, the tube side heat transfer co-efficient just at the entrance of the tube is_________________?

In a shell and tube heat exchanger, the tube side heat transfer co-efficient just at the entrance of the tube is_________________?

A. Infinity
B. Zero
C. Same as average heat transfer co-efficient for tube side
D. None of these

Read More In a shell and tube heat exchanger, the tube side heat transfer co-efficient just at the entrance of the tube is_________________?
Chemical Heat Transfer

Overall heat transfer co-efficient of a particular tube is U1. If the same tube with some dirt deposited on either side has coefficient U2, then_________________?

Overall heat transfer co-efficient of a particular tube is U1. If the same tube with some dirt deposited on either side has coefficient U2, then_________________?

A. U1 = U2
B. U2 > U1
C. U1 > U2
D. U1 = dirt factor – U2

Read More Overall heat transfer co-efficient of a particular tube is U1. If the same tube with some dirt deposited on either side has coefficient U2, then_________________?
Chemical Heat Transfer

In case of _____________ boiling, the bubbles formed on a submerged hot surface get absorbed in the mass of the liquid?

In case of _____________ boiling, the bubbles formed on a submerged hot surface get absorbed in the mass of the liquid?

A. Nucleate
B. Pool
C. Low pressure
D. None of these

Read More In case of _____________ boiling, the bubbles formed on a submerged hot surface get absorbed in the mass of the liquid?
Chemical Heat Transfer

Grashoff number, which is defined as g . β (Ts – T∞) ρ2. L3/μ2, is proportional to the ratio of buoyancy force to ____________ force?

Grashoff number, which is defined as g . β (Ts – T∞) ρ2. L3/μ2, is proportional to the ratio of buoyancy force to ____________ force?

A. Viscous
B. Elastic
C. Inertial
D. None of these

Read More Grashoff number, which is defined as g . β (Ts – T∞) ρ2. L3/μ2, is proportional to the ratio of buoyancy force to ____________ force?
Chemical Heat Transfer

Boiling point elevation of a solution of NaOH _____________________?

Boiling point elevation of a solution of NaOH _____________________?

A. Increases rapidly with temperature rise
B. Is almost independent of temperature
C. Is almost independent of pressure
D. Both B. and C

Read More Boiling point elevation of a solution of NaOH _____________________?

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