Related Questions

The thermosetting plastic
A Becomes rigid when moulded at suitable pressure and temperature
B At 127°C to 177°C permanently set and further application of heat does not soften it
C Chars at 343°C
D All the above
__________ is a thermosetting plastic.
A Polyvinyl chloride
B Polythene
C Bakelite
D Teflon
Thermosetting plastic materials
A Can be repeatedly melted
B Is useful for melt casting
C Can not be melted after forming
D Is useful for spinning
An ideal plastic substance indicates no deformation, when stressed upto yield stress, but behaves like a Newtonion fluid beyond yield stress. Which of the following is an ideal plastic?
A Sewage sludge
B Rubber latex
C Blood
D Sugar solution
A machine produces 1,000 units of plastic chair per hour . Working continuously at this rate, how many plastic chairs will this machine produce in a week ?
A 7,000
B 68,000
C 268,000
D 168,000
Suppose you are the account holder of a bank. The bank . The bank offered you a plastic card with a credit limit of TK. 20.000 and your account has to be settled in full at the end of each month. Usually there is an annual fee for using this credit facility . This type of plastic card is called ?
A Debit Card
B Credit Card
C Charge Card
D Pre-paid Card
In case of a simply supported rectangular beam of span L and loaded with a central load W, the length of elasto-plastic zone of the plastic hinge, is
A $$\frac{{\text{L}}}{2}$$
B $$\frac{{\text{L}}}{3}$$
C $$\frac{{\text{L}}}{4}$$
D $$\frac{{\text{L}}}{5}$$
In case of a simply supported I-section beam of span L and loaded with a central load W, the length of elasto-plastic zone of the plastic hinge, is
A $$\frac{{\text{L}}}{2}$$
B $$\frac{{\text{L}}}{3}$$
C $$\frac{{\text{L}}}{4}$$
D $$\frac{{\text{L}}}{5}$$
Which of the following is a thermosetting polymer?
A PVC
B PTFE
C Nylon
D Polyesters
Thermosetting resins are those polymers, which
A Do not increase in plasticity with rise in temperature
B Allow slip to occur between molecules
C Do not take on a permanent set
D None of these

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