CHEMICAL ENGINEERING | Heat Transfer

Dietus-Boelter equation cannot be used for molten metals mainly due to its very low

Byadmin August 25, 2022

Question: Dietus-Boelter equation cannot be used for molten metals mainly due to its very low
[A].

Prandtl number

[B].

Grashoff number

[C].

thermal conductivity

[D].

viscosity

Answer: Option A

Explanation:

No answer description available for this question.

CHEMICAL ENGINEERING | Fuels and Combustion

Wood charcoal is obtained by the destructive distillation of wood. It is used in the production of activated carbon, which is not used for the

Question: Wood charcoal is obtained by the destructive distillation of wood. It is used in the production of activated carbon, which is not used for the
[A].

decolourisation of sugar.
[B].
solvent recovery from air and gases
[C].
absorption of gases and vapor.
[D].
electrode manufacture.

Answer: Option D

Explanation:

No answer description available for this question.

Read More Wood charcoal is obtained by the destructive distillation of wood. It is used in the production of activated carbon, which is not used for the
CHEMICAL ENGINEERING | Chemical Engineering Plant Economics

If ‘S’ is the amount available after ‘n’ interest periods for an initial principal ‘P’ with the discrete compound interest rate ‘i’, the present worth is given by

Question: If ‘S’ is the amount available after ‘n’ interest periods for an initial principal ‘P’ with the discrete compound interest rate ‘i’, the present worth is given by
[A].

(1 + i)n/S
[B].
S/(1 + i)n
[C].
S/(1 + in)
[D].
S/(1 + n)i

Answer: Option B

Explanation:

No answer description available for this question.

Read More If ‘S’ is the amount available after ‘n’ interest periods for an initial principal ‘P’ with the discrete compound interest rate ‘i’, the present worth is given by
Heat Transfer

Absorptivity of a body will be equal to its emissivity___________________?

Absorptivity of a body will be equal to its emissivity___________________?

A. at all temperatures
B. at one particular temperature
C. when system is under thermal equi-librium
D. at critical temperature
E. for a polished body

Read More Absorptivity of a body will be equal to its emissivity___________________?
CHEMICAL ENGINEERING | Fluid Mechanics

Drag co-efficient for flow past immersed body is the ratio of __________ to the product of velocity head and density.

Question: Drag co-efficient for flow past immersed body is the ratio of __________ to the product of velocity head and density.
[A].

shear stress
[B].
shear force
[C].
average drag per unit projected area
[D].
none of these

Answer: Option C

Explanation:

No answer description available for this question.

Read More Drag co-efficient for flow past immersed body is the ratio of __________ to the product of velocity head and density.
CHEMICAL ENGINEERING | Chemical Engineering Basics

More than 95% of __________ is present in corrundum.

Question: More than 95% of __________ is present in corrundum.
[A].

SiO2
[B].
A12O3
[C].
CaSiO2
[D].
MgO

Answer: Option B

Explanation:

No answer description available for this question.

Read More More than 95% of __________ is present in corrundum.
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

A vapour absorption refrigerator uses __________ as a refrigerant.

Question: A vapour absorption refrigerator uses __________ as a refrigerant.
[A].

water
[B].
ammonia
[C].
freon
[D].
aqua-ammonia

Answer: Option D

Explanation:

No answer description available for this question.

Read More A vapour absorption refrigerator uses __________ as a refrigerant.

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