Basic Loop checking Interview Questions

Welcome to your Quiz.

This quiz is about Loop checking. it contains 20 questions

1.

A diamond on an instrumentation diagram endoses information about:

calibration.

The setpoint

controller action

the power source

2.

On an instrumentation diagram, the loop identification:

consists of two, three, or four letters.

is the same for all instruments in a specific loop.

identifies the measured or initiating variable

appears in the upper portion of the instrument balloon

3.

Central connection points for signal lines are called:

instrument ports.

junction boxes

input/output junctions

field ports

4.

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

endothermic

continuous

intermittent

exothermic

5.

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.

I/PTransducer

Signal Conditioner

D/P Transmitter

A/D Converter

6.

A process is ______if heat is produced by a reaction.

endothermic

continuous

intermittent

exothermic

7.

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

sensor

controller

final control device

all of the above

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.

I/P Transducer

MV/I Transducer

D/A Converter

P/I Transducer

9.

In a pneumatic loop diagram, tube and bundle numbers

appear in rectangles

are written on or near the signal line

appear in the notes section

are connected with a curved arrow to the signal line

10.

Iron constantan thermocouples are designated by the letter:

T

J

B

S

11.

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

split range

fail safe

air to close

fuli range

12.

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

P/I Transducer

E/I Transducer

D/P Transmitter

V/C Converter

13.

The transmission signais considered standard for most instrument systems are:

4 to 20 psi and 3to15 mA.

O to 24 volts and O to 20 psig.

3 to 15 psig and 4 to 20 mA.

O to 20 mA and O to 15 psig

14.

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

transmitter

sensor

controller

valve

15.

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.

I/PTransducer

P/I Transducer

D/A Converter

mV/I Transducer

16.

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

manipulated variable.

deviation.

set point

controlled variable

17.

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

bold solid lines

fine solid lines.

bold broken lines.

fine broken lines.

18.

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

fail closed

maintain position

fail open

fail indeterminate

19.

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

circles

diamonds

ellipses

squares

20.

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

true, if the extension wires are submerged in the process fluid

true in all installations.

false. Extension wires must be made from either copper or brass.

false. The type of extension wire makes no difference

Welcome to your Quiz.

This quiz is about Loop checking. it contains 20 questions

A diamond on an instrumentation diagram endoses information about:

On an instrumentation diagram, the loop identification:

Central connection points for signal lines are called:

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

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.

A process is ______if heat is produced by a reaction.

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

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.

In a pneumatic loop diagram, tube and bundle numbers

Iron constantan thermocouples are designated by the letter:

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

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

The transmission signais considered standard for most instrument systems are:

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

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.

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

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

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

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

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

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