unit 8

unit 8

Assessment

Quiz

•

Engineering

•

University

•

Practice Problem

•

Medium

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216 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

1. A solenoid valve is an electro-mechanical device that, when energized or de-energized, performs which function?

Measures fluid pressure
Shuts off or allows fluid flow
Increases fluid temperature
Compresses instrument air

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

2. When an electric current energizes the coil of a solenoid, what is produced?

A magnetic field
High-pressure air
A chemical reaction
A loud alarm

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

3. In a de-energized solenoid valve as shown in Figure 2A, what component pushes the valve stem down to keep the valve closed?

The core (armature)
The spring
The electric leads
The inlet port

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

4. According to the P&ID in Figure 3, what does "AO/AFC" stand for?

Actuator Open / Actuator Fails Closed
Air Open / Air Fails Close
Automatic Open / Automatic Fails Close
Always Open / Always Fails Close

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

5. In the emergency trip circuit (Figure 3), what happens to the solenoid valve ZV-010 when the temperature switch TS-010 trips at 100∘C?

It energizes
It de-energizes
It throttles to 50%
It sends a signal to the controller

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

6. When the 3-way solenoid valve ZV-010 de-energizes, it closes the air supply (P) and opens which port to vent the actuator?

Port A (Actuator)
Port P (Pressure)
Port E (Exhaust)
Port D (Drain)

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

7. In the circuit shown in Figure 5, what component is energized when the Level Switch LS1 is closed?

The 110 Vdc power supply
Relay R1
Solenoid Valve ZV-1
The 12 Vdc battery

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