Which of the Following Is Not a Natural Source of Background

question 11

Multiple Choice

Which of the following is not a natural source of background radiation?

• A) Cosmic rays
• B) Radium and uranium
• C) Carbon 14
• D) Nuclear fallout

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Definitions:

Emergency/Parking Brakes

A secondary braking system designed to keep a vehicle stationary when parked and act as a backup in case of the primary brake system's failure.

Three Valve System

A three valve system typically refers to an engine design where each cylinder has three valves, two for intake and one for exhaust, which can improve airflow, fuel combustion efficiency, and overall engine performance.

Dash Control

Controls located on the dashboard of a vehicle or machine, allowing the operator to manage various functions and systems.

Air Pressure

The force exerted by air, whether in a specific container or in the atmosphere, typically measured in pounds per square inch (PSI) or bar.