Given the Following List of Densities,which Materials Would Float in a Molten

question 42

Multiple Choice

Given the following list of densities,which materials would float in a molten vat of lead provided that they do not themselves melt? Densities (g/mL) : lead = 11.4,glass = 2.6,gold = 19.3,charcoal = 0.57,platinum = 21.4.

• A)gold and platinum
• B)glass and charcoal
• C)gold,platinum,glass and coal
• D)gold and charcoal
• E)none of the above

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Definitions:

Dual Circuit Application Valve

A valve used in braking systems designed for redundancy, ensuring braking capability even if one circuit fails.

Automatic Slack Adjuster

A device in air brake systems that automatically adjusts the brakes as needed to maintain proper clearance between the brake shoes and drums.

Brake Free Stroke

The amount of movement or travel the brake pedal or lever undergoes before the brake mechanism starts to engage.

Friction Surfaces

Areas where two materials come into contact and movement between them is resisted by friction, important in braking systems and clutches.