Ch27 Exam Questions Instrumentation

Introduction to Process Technology (NAPTA)

Chapter 27 Instrumentation

1) What is a varying operational condition that is associated with a processing operation such as temperature, pressure, flow rate, level, and composition?

A) Remote

B) Process variable

C) Analytical variable

D) Transducer

Page Ref: 350

Objective: 27.1 Describe the purpose or function of process control instrumentation in the process industries

Blooms Level: Understand

2) Which of the following is an example of instrumentation that could be programmed to begin each step in the process upon completion of the previous one?

A) Filter backwash

B) Dryer regeneration

C) Regeneration of a catalyst bed

D) All of the above

Page Ref: 350

Objective: 27.1 Describe the purpose or function of process control instrumentation in the process industries

Blooms Level: Understand

3) What is the most common pressure measurement found in the US process industry?

A) Differential pressure (psid)

B) Pounds per square inch (psi)

C) Inches of mercury (inHg)

D) Pounds per square inch absolute (psia)

Page Ref: 351

Objective: 27.2 Identify the key process variables that are monitored and/or controlled by instrumentation: temperature, pressure, level, flow, analytical variables

Blooms Level: Understand

4) Which of the following is a temperature-sensing instrument?

A) Thermistors

B) Manometers

C) Radar gauges

D) All of the above

Page Ref: 351

Objective: 27.2 Identify the key process variables that are monitored and/or controlled by instrumentation: temperature, pressure, level, flow, analytical variables

Blooms Level: Understand

5) Which of the following is a common flow-sensing element that creates a difference in pressure that can be measured by a D/P cell?

A) Rotating piston

B) Oval gear

C) Orifice plates

D) Rotating vane meters

Page Ref: 352-353

Objective: 27.2 Identify the key process variables that are monitored and/or controlled by instrumentation: temperature, pressure, level, flow, analytical variables

Blooms Level: Understand

6) What is a measurement of the chemical or physical properties of a substance?

A) Remote

B) Process variable

C) Analytical variable

D) Transducer

Page Ref: 354

Objective: 27.2 Identify the key process variables that are monitored and/or controlled by instrumentation: temperature, pressure, level, flow, analytical variables

Blooms Level: Understand

7) What is the main signal for process instrumentation lines and control loop instruments?

A) Hydroelectric power

B) Electricity

C) Solar power

D) Pneumatic power

Page Ref: 354

Objective: 27.3 Identify typical process control instruments, their major types, applications, and functions: sensor (e.g., thermocouple), transmitter, indicator, recorder, controller, transducer, alarm, control valve, actuator, valve positioner

Blooms Level: Understand

8) Which of the following is an element in direct contact with the process variable to be measured that senses a change and provides a signal to the transmitter?

A) Sensor

B) Indicator

C) Recorder

D) Controller

Page Ref: 355

Objective: 27.3 Identify typical process control instruments, their major types, applications, and functions: sensor (e.g., thermocouple), transmitter, indicator, recorder, controller, transducer, alarm, control valve, actuator, valve positioner

Blooms Level: Understand

9) Which of the following is an instrument used to document variables such as pressure, speed, flow, temperature, level, and electrical units?

A) Sensor

B) Indicator

C) Recorder

D) Controller

Page Ref: 355

Objective: 27.3 Identify typical process control instruments, their major types, applications, and functions: sensor (e.g., thermocouple), transmitter, indicator, recorder, controller, transducer, alarm, control valve, actuator, valve positioner

Blooms Level: Understand

10) What uses air pressure, or a gas such as nitrogen, as a power source traveling through copper or stainless tubes?

A) Analog signal

B) Digital signal

C) Hydraulic instruments

D) Pneumatic instruments

Page Ref: 355

Objective: 27.3 Identify typical process control instruments, their major types, applications, and functions: sensor (e.g., thermocouple), transmitter, indicator, recorder, controller, transducer, alarm, control valve, actuator, valve positioner

Blooms Level: Understand

11) What component of process control instrumentation systems converts one instrumentation signal type into another type?

A) Alarm

B) Control valve

C) Transducer

D) Valve positioner

Page Ref: 356

Objective: 27.3 Identify typical process control instruments, their major types, applications, and functions: sensor (e.g., thermocouple), transmitter, indicator, recorder, controller, transducer, alarm, control valve, actuator, valve positioner

Blooms Level: Understand

12) What type of signal is a continuously variable representation of a process variable?

A) Analog signal

B) Process signal

C) Digital signal

D) Automatic signal

Page Ref: 356

Objective: 27.4 Describe types of process control instrumentation signals

Blooms Level: Understand

13) What system uses light frequency signals and is gaining popularity in industry use?

A) Fiber optics

B) Pneumatic signals

C) Compression signals

D) Hydraulic signals

Page Ref: 357

Objective: 27.4 Describe types of process control instrumentation signals

Blooms Level: Understand

14) What is the difference between the set point and the current process variable value called?

A) Error

B) Excess

C) Oversight

D) Set point

Page Ref: 357

Objective: 27.5 Define a generic control loop and provide an example

Blooms Level: Understand

15) What type of control element can only be on or off?

A) Discrete

B) Modulated

C) Valve control

D) Continuous

Page Ref: 358

Objective: 27.5 Define a generic control loop and provide an example

Blooms Level: Understand

16) What common component of a DCS system is a data highway that connects the systems?

A) Network

B) Workstations

C) Central processor

D) Supervisory computers

Page Ref: 359

Objective: 27.6 Describe distributed control systems and how they are applied in the process industries

Blooms Level: Understand

17) What common component of a DCS system are computers accessed by engineers and management at the programming level to monitor production targets?

A) Network

B) Workstations

C) Central processor

D) Supervisory computers

Page Ref: 359

Objective: 27.6 Describe distributed control systems and how they are applied in the process industries

Blooms Level: Understand

18) Which of the following improper operations could most likely lead to hand and/or back injuries?

A) Bypassing alarms

B) Failure to respond to an alarm

C) Adjusting leaking control valve packing

D) Attempting to open a motor controlled valve manually

Page Ref: 359

Objective: 27.7 Discuss the hazards associated with process control instruments

Blooms Level: Understand

19) Which of the following improper operations will not cause equipment shutdown?

A) Bypassing alarms

B) Failure to respond to an alarm

C) Partially opening a bypass valve around a working control valve

D) Turning off air supplies to control devices

Page Ref: 359

Objective: 27.7 Discuss the hazards associated with process control instruments

Blooms Level: Understand

20) What is a possible equipment impact of adjusting leaking control valve packing?

A) Shutdown of process unit

B) Damage to motor

C) Valve may not open, close, or operate properly

D) Possible damage to downstream equipment due to higher flows and pressures

Page Ref: 359

Objective: 27.7 Discuss the hazards associated with process control instruments

Blooms Level: Understand

21) Which of the following is the symbol for a pneumatic signal?

A)

B)

C)

D)

Page Ref: 360

Objective: 27.8 Describe the monitoring and maintenance activities associated with process control instrumentation

Blooms Level: Understand

22) Which of the following is the symbol for a hydraulic signal?

A)

B)

C)

D)

Page Ref: 360

Objective: 27.8 Describe the monitoring and maintenance activities associated with process control instrumentation

Blooms Level: Understand

23) Which of the following is a symbol for panel mounted instrumentation?

A)

B)

C)

D)

Page Ref: 360

Objective: 27.8 Describe the monitoring and maintenance activities associated with process control instrumentation

Blooms Level: Understand

24) Which of the following is a symbol for remotely mounted instrumentation?

A)

B)

C)

D)

Page Ref: 360

Objective: 27.8 Describe the monitoring and maintenance activities associated with process control instrumentation

Blooms Level: Understand