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This quiz is about Loop checking. it contains 20 questions

1.

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

2.

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

3.

Iron constantan thermocouples are designated by the letter:

4.

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.

5.

A process is ______if heat is produced by a reaction.

6.

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

7.

The transmission signais considered standard for most instrument systems are:

8.

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.

9.

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

10.

On an instrumentation diagram, the loop identification:

11.

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

12.

A diamond on an instrumentation diagram endoses information about:

13.

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

14.

In a pneumatic loop diagram, tube and bundle numbers

15.

Central connection points for signal lines are called:

16.

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.

17.

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

18.

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

19.

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

20.

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


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