Related Questions

Kelly and Chris packed several boxes with books. If Chris packed 60 percent of the total number of boxes, what was the ratio of the number of boxes Kelly packed to the number of boxes Chris packed?
A 1 to 6
B 1 to 4
C 2 to 5
D 2 to 3
A woman while shopping in a mall pushes her trolley 20 metres through an alley which is going East, then she turns to her left and walks 30 metres, then she turns West and walks another 30 metres, then she turns South and walks 30 metres and then she turns West and walks 25 metres. Where is she now with reference to her starting position?
A 35 metres West
B 5 metres West
C 35 metres East
D 5 metres East
A rectangular floor that measures 8 metres by 10 metres is to be covered with carpet squares that each measures 2 metres by 2 metres. If a carpet square costs Tk. 12, calculator the total cost cover 2/3 of the floor?
A Tk. 160
B Tk. 240
C Tk. 480
D None of these
The reason for preferring packed towers over plate towers in distillation practice is that the packed tower operation gives
A Low pressure drop and high hold up
B High pressure drop and low hold up
C Low pressure drop and low hold up
D High pressure drop and high hold up
Use of packed towers for distillation is generally limited to the
A Small sizes
B Multicomponent distillation
C High pressure operation
D Vacuum distillation
A train of length, 245 metres, takes 20 seconds to cross a 355 metres long bridge. How much time (in seconds) will the train take to cross a 390 metres long platform?
A 6.5
B 9
C 21.16
D 15
At the same gas flow rate, the pressure drop in a packed tower being irrigated with liquid __________ that in dry packed tower.
A Is greater than
B Is lower than
C Is same as
D Cannot be predicted as data are insufficient
Commercial packed scrubbers are normally designed for a pressure drop range of __________ mm water coloumn per metre of packed height.
A 4-8
B 17-34
C 52-68
D 88-105
Vacuum maintained in the vacuum distillation tower of the crude distillation plant is about __________ mm Hg (absolute).
A 5-10
B 30-80
C 150-250
D 350-400
A machine part is packed in a box of size 5cm x 4cm x 2cm. The number of parts that can be packed in a carton of size 25cm x 16cm x 8cm is-
A 60
B 80
C 40
D 160

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