In a Data Flow Diagram, External Entities Are Represented By

question 56

Multiple Choice

In a data flow diagram, external entities are represented by:

• A)rounded boxes.
• B)square boxes.
• C)circles.
• D)open rectangles.

---

Definitions:

S-cam Profile

A specific shape or contour of an S-cam, which is part of a drum brake system in large vehicles, responsible for transforming the motion of brake actuators into a force that applies the brakes.

Lithium-soap Grease

A type of lubricant made from lithium soap, known for its high resistance to water and its use in automotive and industrial applications to reduce friction and protect against corrosion.

API GL-5

A classification of gear lubricant specified by the American Petroleum Institute, indicating it’s suitable for high-pressure conditions and hypoid gears, commonly used in automotive axles.

Alcohol Evaporator Canister

A component in an air brake system that removes moisture from the air lines using an alcohol-based solution to prevent freezing.