Related Questions

Low density polythene as compared to high density polythene is
A Harder
B Tougher
C Chemically inert
D More flexible
Low pressure Zeigler process for the manufacture of polythene uses a catalyst which is
A Ni
B V2O5
C Fe
D Aluminium triethyl combined with titanium tetrachloride
Typical solvent polymerisation reaction conditions for the production of high density polythene by Zeigler process is
A 7 kgf/cm2 and 70°C
B 1000 kgf/cm2 and 100°C
C 7 kgf/cm2 and 700°C
D 1 kgf/cm2 (gage) and 70°C
Density of low density polythene is about __________ gm/c.c.
A 0.38
B 0.56
C 0.81
D 0.91
Density of high density polythene is about __________ gm/c.c.
A 1.18
B 1.05
C 0.95
D 0.99
Polythene (low or high density) containers are not corroded by
A Sulphuric acid (10%) at room temperature
B Nitric acid (95%) at room temperature
C Sulphur trioxide at 60°C
D Any of these
In a compound steam engine, the first stage of expansion is carried out in a high pressure cylinder whereas the last expansion is completed in low pressure cylinder. The diameter of high pressure cylinder is _________ the low pressure cylinder.
A Equal to
B Less than
C More than
D None of these
Low pressure Zeigler process of polythene manufacture
A Employs a pressure of 30 kgf/cm2
B Achieves an yield of 95 - 98% based on ethylene
C Produces very low density polythene
D Does not use any catalyst for polymerisation
The Ziegler-Nichols method:
A is a graphical solution method
B can be used to determine gain factors of a PI loop
C is a method of control
D a and b above
E None of the above
A company produces five types of shirts -- A,B,C,D and E-using cloth of three qualities -- high, medium and low , using dyes of three qualities-- high, medium and low. One shirt requires 1.5 m of cloth .The following table gives respectively : The number of shirts (of each category) produced, in thousands. The percentage distribution of cloth quality in each type of shirt, and The percentage distribution of dye quality in each type of shirt. What is the ratio of low quality dye used for C-type shirts to that used for D-type shirts ?
A 2:3
B 1:2
C 2:1
D 3:2

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