Digg Deep Inc

question 15

Multiple Choice

Digg Deep Inc. makes and leases a backhoe to Estes. Due to a defect attributable to Digg Deep's negligence, Estes is injured in an accident in which his neighbor Fortis is also hurt. In a product liability suit based on negligence, Digg Deep may be liable to​

• A) ​Estes only.
• B) ​no one.
• C) ​Estes and Fortis.
• D) ​Fortis only.

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Definitions:

Variable-frequency Drive

A system used to control the speed of an electric motor by varying the frequency and voltage supplied to the electric device.

Motor Controller

A device that regulates the performance of an electric motor by varying parameters such as voltage and current.

PWM

Pulse Width Modulation, a technique used to control the amount of power delivered to an electrical device by varying the duty cycle of a pulse signal.

Four-quadrant

Refers to operating modes of a drive or control system that can handle both positive and negative directions of both power and torque in all four quadrants of operation.