Electrical Switches, relays, alarms questions chapter 8

What is the purpose of a switch?

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• To allow electrical circuits to operate

• To measure velocity

• To determine displacement

• To monitor alarm systems

Which of the following is also called a toggle switch?

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• Pushbutton switch

• Hand switch

• Limit switch

• Proximity switch

What is another name for an on/off/auto switch?

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• Limit

• Rotary

• Proximity

• Selector

How are autostart switches used?

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• To sound an alarm when process variables enter an abnormal range

• To initiate an action based on its response to a predetermined process condition

• To deactivate a circuit in fail-safe situations

• To actuate a circuit that shuts down a process

Which of the following are used to override parameters of a system?

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• Toggle switches

• Alarm switches

• HOA switches

• Bypass switches

What type of equipment commonly uses vibration sensors?

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• Rotating equipment

• Underwater equipment

• Old equipment

• Hazardous equipment

What is used to represent switches on process diagrams?

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• Colors

• Triangles and circles

• Lines and dashes

• Standardized symbols

What is the primary function of a relay?

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• To warn process technicians of a hazard

• To pass information to an external circuit

• To automatically stop a process

• To shutdown a machine when it overheats

Which of the following relay types are used to perform mathematical operations?

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• Solid state

• Thermally operated

• Electromechanical

• Timing

Which of the following relay types are used in temperature applications?

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• Solid state

• Thermally operated

• Selection

• Timing