The Value of the Expression 12 - 4 * 3

question 36

Multiple Choice

The value of the expression 12 - 4 * 3 / 2 + 9 is _________.

• A)21
• B)15
• C)-6
• D) 6
• E)None of the above

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Definitions:

Pilot Devices

Control instruments that command the operation of electrical machinery indirectly, often through the use of relays or contactors.

Motor Starter

A device that controls the use of electrical power to equipment, especially to start and stop motors.

Control Coil

A coil used in a relay or other electrical device, which creates a magnetic field when electricity is passed through it, thereby controlling the operation of the device.

Two-wire Control

A control circuit configuration where only two conductors are used to complete the circuit between the control device and the equipment being controlled.