Chemical Heat Transfer

Radiator of an automobile engine is a ______________ type of heat exchanger?

Byadmin March 2, 2019August 24, 2021

Radiator of an automobile engine is a ______________ type of heat exchanger?

A. Co-current
B. Cross-current
C. Counter-current
D. Direct contact

Chemical Heat Transfer

Grashoff number is given by________________?

Grashoff number is given by________________?

A. gD3.β.Δtρ2/μ2
B. gD2βΔtρ/μ2
C. gD2βΔtP2μ
D. gD3βΔtP2/μ

Read More Grashoff number is given by________________?
Chemical Heat Transfer

A process stream of dilute aqueous solution flowing at the rate of10 Kg.s-1 is to be heated. Steam condensate at 95°C is available for heating purpose, also at a rate of 10 Kg.s-1. A 1 – 1 shell and tube heat exchanger is available. The best arrangement is_______________?

A process stream of dilute aqueous solution flowing at the rate of10 Kg.s-1 is to be heated. Steam condensate at 95°C is available for heating purpose, also at a rate of 10 Kg.s-1. A 1 – 1 shell and tube heat exchanger is available. The best arrangement is_______________?

A. Counter flow with process stream on shell side
B. Counter flow with process stream on tube side
C. Parallel flow with process stream on shell side
D. Parallel flow with process stream on tube side

Read More A process stream of dilute aqueous solution flowing at the rate of10 Kg.s-1 is to be heated. Steam condensate at 95°C is available for heating purpose, also at a rate of 10 Kg.s-1. A 1 – 1 shell and tube heat exchanger is available. The best arrangement is_______________?
Chemical Heat Transfer

Mode of heat transfer involved in the cooling of air cooled internal combustion engine is_________________?

Mode of heat transfer involved in the cooling of air cooled internal combustion engine is_________________?

A. Conduction
B. Natural convection
C. Forced convection
D. None of these

Read More Mode of heat transfer involved in the cooling of air cooled internal combustion engine is_________________?
Chemical Heat Transfer

In Biot number, the characteristic length used is the ratio of the _______________ of the solid?

In Biot number, the characteristic length used is the ratio of the _______________ of the solid?

A. Volume to surface area
B. Perimeter to surface area
C. Surface area to volume
D. Surface area to perimeter

Read More In Biot number, the characteristic length used is the ratio of the _______________ of the solid?
Chemical Heat Transfer

Absorptivity of a perfect black body is unity. Which of the following has maximum absorptivity ?

Absorptivity of a perfect black body is unity. Which of the following has maximum absorptivity ?

A. Aluminium foil
B. Refractory bricks
C. Iron plate
D. Coke breeze

Read More Absorptivity of a perfect black body is unity. Which of the following has maximum absorptivity ?
Chemical Heat Transfer

Vacuum is generally maintained in the vapour space of an evaporator mainly to__________________?

Vacuum is generally maintained in the vapour space of an evaporator mainly to__________________?

A. Get economical temperature difference by using moderate pressure steam
B. Facilitate forward feeding in multiple effect evaporation
C. Concentrate heat sensitive materials
D. Achieve very high concentration of the final product

Read More Vacuum is generally maintained in the vapour space of an evaporator mainly to__________________?

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