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This quiz is about Loop checking. it contains 20 questions

1.

In an electronic loop diagram, junction box connections are represented by:

2.

A pneumatic control valve, without a positioner, is the final control element in an instrument loop. The transmitter and controller are both electronic. In order for this control system to operate, a(an) must be installed in the instrument signal line between the controller and the control valve.

3.

Iron constantan thermocouples are designated by the letter:

4.

To convert the output from a thermocouple to a standard 4 to 20 mA instrument signal, a(n) with cold junction compensation would be used.

5.

A typical process control loop component would be which of the following?

6.

The transmission signais considered standard for most instrument systems are:

7.

To change the 4 to 20 mA analog signal from a transmitter to the signal required by a digital controller, a (an)______ must be a part of the instrument signal loop.

8.

A process is _____ if heat input is required to produce a reaction.

9.

A control valve with a direct acting actuator and is air to close will:

10.

Process instrument connection lines are indicated on an instrumentation diagram by:

11.

A pneumatic valve actuator that operates over an instrument signal range of 9-15 psi is referred to as:

12.

A diamond on an instrumentation diagram endoses information about:

13.

In most process control systems the final control element is a:

14.

On an instrumentation diagram, the loop identification:

15.

The thermostat for a central air conditioning system is set at 68°F. This value is an example of the:

16.

The statement; “Thermocouple extension wires must have the same thermoelectric properties as the thermocouple that they are used with,” is:

17.

A device that changes a voltage signal to a current signal is normally referred to as a(an):

18.

A process is ______if heat is produced by a reaction.

19.

Central connection points for signal lines are called:

20.

In a pneumatic loop diagram, tube and bundle numbers


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