Multiple Choice QuestionsSuper glue or crazy glue is
poly (methyl methacrylate)
poly (ethyl acrylate)
poly (methyl -cyanoacrylate)
poly (ethyl methacrylate)
Which metal aprons are worn by radiographer to protect him from radiation?
Mercury coated apron
Lead apron
Copper apron
Aluminimised apron
B.
Lead apron
A lead apron or leaded apron is a type of protective clothing that acts as a radiation shield. It is constructed of a thin rubber exterior and an interior of lead in the shape of a hospital apron. The purpose of the lead apron is to reduce exposure of a hospital patient to x-rays to vital organs that are potentially exposed to ionizing radiation during medical imaging that uses x-rays (radiography, fluoroscopy, computed tomography).
Terylene is the polyester of
hexamethylene diamine and adipic acid
vinyl chloride and formaldehyde
melamine and formaldehyde
ethylene glycol and terephthalic acid
Terylene is a polymer obtained from
ethylene glycol and glycerol
ethylene glycol and glyceraldehyde
ethylene glycol and terephthalic acid
None of the above
For the formation of terylene the number of moles of ethylene glycol required per mole of terephthalic acid is
1
2
3
4
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