Related Questions

The popular notion that a tree's age can be determined by counting number of internal rings in its trunk is generally true. Howeevr, to help regulate the internal temperature of the tree, the outermost layers of wood of the Brazilian ash often →peel away when the temperature exceeds 95 degrees Fahrenheit, leaving the tree with fewer rings than it would otherwise have. So only if the temperature in the Brazilian ash's environment never exceeds 95 degrees Fahrenheit →elav eing the tree with fewer rings than it would otherwise have. So only if the reliable measure of the tree's age. Which of the following is an assumption on whish the argument above depends?
A The growth of new rings in a trees is not a function of levels of precipitation.
B Only the Brazilaian ash loses rings because of excessive heat.
C One day of temperatures above 95 degrees Fahrenheit will cause the Brazilian ash to lose one ring.
D The internal rings of all tress are of uniform thickness
In case of saddle packing (e.g., berl and intralox saddles), the maximum size of the packing should not exceed __________ of the column diameter.
A $${\frac{1}{5}^{{\text{th}}}}$$
B $${\frac{1}{{15}}^{{\text{th}}}}$$
C $${\frac{1}{{30}}^{{\text{th}}}}$$
D $${\frac{1}{{50}}^{{\text{th}}}}$$
In an absorption coloumn, the flooding velocity for random packing is __________ that for stacked/regular packing.
A Greater than
B Smaller than
C Equal to
D Either A, or B ; depends on the type of packing
Stacked packing compared to dumped packing
A Provides poorer contact between the fluids
B Gives lower pressure drop
C Both A & B
D Gives higher pressure drop
Use of raschig rings in place of crushed stones as packing in packed beds (other things being same)
A Increases pressure drop, increases surface area
B Increases pressure drop, decreases surface area
C Decreases pressure drop, increases surface area
D Decreases pressure drop, decreases surface area
Most stuffed toys are stuffed with industrial cotton. There are stuffed bears and stuffed tigers.Some chairs are stuffed with industrial cotton. If the first three statements are true then which of the following statements must also be true?
A I only
B II only
C II and III only
D I,II and III
Most important factor to be considered in the selection of packings for absorbers is the __________ of packing.
A Size
B Durability
C Porosity
D Cost
__________ rubber is generally used for making 'O' rings used for vacuum sealings.
A Natural
B Neoprene
C Butadiene
D Nitrile
Which of the following is the most common type of baffle used in industrial shell and tube heat exchanger?
A 75% cut segmental baffle
B 25% cut segmental baffle
C Orifice baffle
D Disk and doughnut baffle
The most common standard size of bubble caps used in industrial operation is
A 1" dia cap with 0.5" dia riser
B 6" dia cap with 4" dia riser
C 8" dia cap with 1" dia riser
D 4" dia cap with 8" dia riser

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