List the Four Different Roles a Fieldworker Can Take When

question 9

Essay

List the four different roles a fieldworker can take when conducting an ethnographic study.Briefly describe an advantage and a disadvantage of each.

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Definitions:

Penetrating Oil

A low-viscosity oil designed to penetrate tight spaces and loosen rusted or frozen parts.

Cloud Point

The temperature at which some of the fractions in a diesel fuel begin to wax (solidify) and the fuel takes on an opaque appearance. This can cause problems in the fuel subsystem by plugging filters, resulting in engine shutdown. Most diesel fuel conditioners contain cloud point and pour point depressants.

Wax Crystals

Solid crystalline substances formed in some oils and fats that can cause blockages in fuel systems or cloud the appearance of liquids at lower temperatures.