E-waste management

What is the major component of e-waste by composition in the Indian scenario for ICT and consumer electronics?

• Ferrous metals.

• Plastic

• Non-ferrous metals

• Glass

The most energy consuming phase in Life

Cycle Analysis of electronic items are

• Material Phase

• Manufacturing Phase

• Packaging Phase

• End-of-life Phase

The various refining methods for E-Waste are

• Pyrometallurgical

• Hydrometallurgical

• Biometallurgical

• All of the above

In metal recovery process, aluminum and copper are separated by

• Electromagnet

• Eddy current seperator

• Both of the above

• None of the above

Suppose, the average wattage of a Samsung mobile is 3.845W and the total charge time is 145 min (per full charge). On the other hand, he average wattage of Nokia mobile is 5.6808W and total charge time= 70 min (per full charge). Assume life-span of the mobile = 2 years and total number of full charge in 2 years = 200 times. What will be the average value of energy expenditure during its life-span (in Watt-Hours)

• 1500Wh

• 1610.20 wh

• 1595.14 Wh

• Can not be determined

Reference dose (RfD) can be calculated as

• NOAEL/Factor of safety

• Acceptable daily intake

• Both of the above

• LOAEL/Factor of safety

Due to informal recycling, annual anthropogenic emission of Carbon-dioxide, Methane and Nitrous Oxide are estimated to be 27,000 Mt Carbon-dioxide/year,370 Mt Methane/year and 6 Mt Nitrous Oxide/year. Find the total equivalent Carbon-dioxide emission over a 100 year time horizon. Mt means million metric ton carbon emission.

• 34567 Mt Carbon-dioxide equivalent

• 37286 Mt Carbon-dioxide equivalent

• Data Inadequate

• 10286 Mt-Carbon-dioxide equivalent

Noranda' process is related to

• Hydrometallurgy

• Pyrometallurgy

• Biometallurgy

• All of the above

Select the most appropriate statement

• The presence of halogenated flame retardents in the smelter feed can lead to formation of dioxins

• Integrated smelters can not recover aluminum and iron as metals

• None of the above

• Both of the above

The various hydro-metallurgical process for extraction of E-Waste are

• Cyanide leaching

• Halide leaching

• Thiourea leaching

• All of the above