WorksheetsPEE13
Total questions: 108
Worksheet time: 1hrs 29mins
Refers to the regulation of all aspects of the process. Precise control of level, temperature, pressure and flow is important in many process applications.
(a)
This is a process management system designed to maintain a process variable at a desired set point.
(a)
This is a value for a process variable that is desired to be maintained.
(a)
This is an undesired change in one of the factors that can affect the process variable.
(a)
Refers to the methods of changing or refining raw materials to create end products.
(a)
Control loops in the process control industry work in the same way, requiring three tasks to occur:
Use comma to separate the answers.
(a)
Refers to the methods that are used to control process variables when manufacturing a product.
(a)
Process control can reduce variability in the end product, which ensures a consistently high-quality product.
(a)
What are the main reasons for manufacturers to control process?Select at least three (3) reasons.
Increase Efficiency
Ensure Safety
Decrease Productivity
Increase Cost
Reduce Variability
Control operations that involve human action to make an adjustment are called
(a)
Process is defined as the changing or refining of raw materials that pass through or remain in a liquid, gaseous, or slurry state to create end products.
True
False
None of the above
In ISA Symbology, which are the measured variables?
Select only three (3) in the choices.
High
Temperature
Safety
Weight
Voltage
A 4–20 mA is the most common standard analog signal used in the process control industry nowadays.
True
False
A pump motor is the most commonly used final control element.
True
False
The basic function of a __________ is to convert a reading from a transducer into a standard signal and transmit that signal to a controller or computer monitor.
Transmitter
Converter
Transducer
Recorder
Match the signal type in Column A with its example/application in Column B.
**Column A** **Column B**
(1) Analog signal (A) 3 –15 psig
(2) Pneumatic signal (B) Fieldbus, Profibus and Modbus
(3) Digital signal (C) 4-20 mA and 1 – 5 V
B, C, A
C, A, B
A,C,A
A, B, C
A customer would use __________to read the temperature of a process fluid on a display.
Actuator
Indicator
Transducer
Voltmeter
If R1 = 60 Ω, R2 = 100 Ω, and R3 = 100 Ω, what is the equivalent resistance (Req) in the circuit?
Slow
Variable Speed
Fast
None of the above
Match the ISA symbols in Column A with its respective description in Column B.
C, D, A, B
D, A, B, C
B, C, D, A
A, B, C, D
This is a part of the control system that acts to physical changes of the manipulated variable.
(a)
A process liquid level needs to be held within 5 ft of 150 ft in a large tank. A pressure transmitter monitors the liquid’s level using a pressure reading and sends the result to a controller. The controller compares the level reading to the set point and opens or closes an inflow or outflow pipe depending on the liquid level. Keeping in mind the given scenario, match the terms in Column A with their values in Column B.
**Column A**
(1) Inferred process variable
(2) Manipulated variable
(3) Measured variable
(4) Set point
**Column B**
(A) 150 ft
(B) Pressure
(C) Flow of liquid to the tank
(D) Level
(a)
The height or elevation of water above (more common) or below (less common) a user-specified point. This term is used in many applications.
(a)
Match each term to its correct description.
(1) Closed-loop, automatic control
(2) Closed-loop, manual control
(3) Open-loop, automatic control
(A) An operator turns off the heater coil when the temperature transmitter outputs a certain reading.
(B) A controller turns off the heater coil at set intervals, regardless of the process temperature.
(C) A temperature sensor measures process temperature, sends the result to a controller to compare to the setpoint, and the controller turns off the heater coil.
Use comma to separate your answer
(a)
Which of the following are advantages of reducing variability in a process
application?
Helps ensure increase in efficiency of the process.
Helps ensure an increase in the reaction rate of the process.
Helps ensure a consistently high-quality end product.
Helps ensure safety
If the level of a liquid in a tank must be maintained within 5 ft to 50 ft, what is the liquid's setpoint?
45ft
55ft
5ft
50ft
The (a) is a value for a process variable that is desired to be maintained.
This is a sustained deviation of the process variable from the setpoint.
(a)
A process variable is a condition that can change the process in some way.
True
False
Open loop control system also known as?
(a)
Any error can be seen as having three (3) major components. These three components are:
Use comma to separate your answers.
(a)
Which of these industries are examples of the process industry?
Pharmaceutical
Satellite
Oil and Gas
Cement
Piggery
The recorder is a device that records the (a) of a measurement or control devices.
What does the acronym P&ID stand for?
Piping and Intelligence Diagram
Piping and Instrumentation Diagram
Process Control and Installation Drawing
Proportional, Integral and Derivative Control
Match each term to its correct definition.
(1) Load disturbance
(2) Control algorithm
(3) Manual control
(4) Manipulated variable
(5) Set point
(A) The factor that is changed to keep a measured variable at set point.
(B) An undesired change in a factor that can affect the process variable.
(C) A value or range of values for a process variable that must be maintained to keep the process running properly.
(D) A control operation that directly involves human action.
(E) A mathematical expression of a control function
(a)
In basic control system, the input or the signal (x) also known as?
(a)
Which of the following is a symbol of a field-mounted control/display element?
Circle with horizontal double line
Square with circle inside
Hexagon with horizontal broken line
None of the above
This is defined as the changing or refining of raw materials that pass through or remain in a liquid, gaseous, or slurry state to create end products.
(a)
Close loop control system also known as?
(a)
Automatic control systems are control operations that involve human action to make adjustment.
True
False
The three tasks associated with any control loop are:Use comma to separate your answers.
(a)
The height to which a column of water is above a reference elevation (e.g., sea level). Like elevation, this term is often used in groundwater applications.
(a)
Imagine you are in a cabin in front of a small fire on a cold winter evening. You feel uncomfortably cold, so you throw another log into the fire. In this scenario, the process variable is temperature.
True
False
In basic control system, the output or the variable (y) also known as?
(a)
Most thermocouple signal conditioners usually display the temperature directly and/or provide a voltage that is not proportional to the thermocouple temperature.
True
False
The passive transducer are self-generating devices which operate under the energy conversion principle.
True
False
This is a thermoelectric device for measuring temperature, consisting of two wires of different metals connected at two points, a voltage being developed between the two junctions in proportion to the temperature difference.
(a)
Unlike metals, thermistors respond inversely to temperature.
True
Maybe
Thermistors respond directly to temperature
False
The thermistor, a thermally sensitive resistor, is made of semi-conducting material.
Nabasa ko 'to (weh?) HAHHAHA CHZ
True
False
Maybe
The leads are connected to a thermocouple signal conditioning box containing an electrical circuit which provides a reference voltage equal to that produced by a reference junction placed at 0°C. This is called?
(a)
These transducers do not need any external source of power for their operation. Therefore, they are also called as self-generating type transducers.
(a)
These transducers need external source of power for their operation. So they are not self generating type transducers.
(a)
When a pair of electrical conductors are joined together, a thermal emf is generated when the junctions are at different temperatures.
True
False
This is a device that converts one form of energy to other form. It converts the measurand to a usable electrical signal.
(a)
5 (five) classification of Passive Transducer.
(a)
5 (five) classification of Active Transducer.
(a)
The hydraulic system works on the principle of what law?
(a)
As air is compressible, it is __________ to achieve uniform and constant piston speed.
Difficult
Manageable
Easy
Moderate
This is the formation of vapor cavities in a liquid.
(a)
This is the energy transmitted and controlled by means of a pressurized fluid, either liquid or gas.
(a)
For proper functioning of hydraulic system, we must have parts such as:*Select four (4) best answers*
Hydraulic Pump
Detector
Pressure Regulator
Control Valve
Storage tank
This is the transmission and control of forces and movements by means of compressed air.
(a)
The pump lift should be as small as possible to decrease the cavitation and to increase the efficiency of the pump
True
False
Pneumatics comes from the Greek work pneuma, which means?
(a)
One of the advantages of pneumatics is availability because air is available everywhere in unlimited quantities.
True
False
Pnuematic system are used in industrial application such as:
*Select four (4) best answers*
Material Handling
Filling
Packaging
Positioning
Turning
This is the process of reduction of high source pressure to a lower working pressure suitable for the application.
(a)
Only when both the inputs are given output is produced.
Check valve
Shuttle valve
Quick Exhaust Valve
AND Valve
Type of pumps uses rotational kinetic energy to deliver the fluid.
(a)
In preparation of the compressed air, we do not need to consider the line sizes and valve size to meet the demand.
True
False
The electronic schematic symbol of?
SPDT Relay
DPDT Relay
SPST Relay, Normally Open Contact
SPST Relay, Normally Close Contact
These transducers do not need any external source of power for their operation. Therefore, they are also called as self -generating type transducers.
(a)
The leads are connected to a thermocouple signal conditioning box containing an electrical circuit which provides a reference voltage equal to that produced by a reference junction placed at 0°C. This is called?
(a)
The active transducers produce the output signal in the form of variation in resistance, capacitance, inductance or some other electrical parameter in response to the quantity to be measured.
True
False
The electronic schematic symbol of?
SPST Relay, Normally Close Contact
SPST Relay, Normally Open Contact
DPDT Relay
SPDT Relay
In preparation of the compressed air, it is okay not to consider the layout of the distribution system.
True
False
Pneumatic systems are used in industrial application such as: (4)
Material Handling
Filling
Drilling
Packaging
Positioning
This is a type of resistor whose resistance is strongly dependent on temperature, more so than in standard resistors.
(a)
These transducers need external source of power for their operation. So they are not self generating type transducers.
(a)
The term thermistor comes from __________ and __________.
(a)
Name this ladder diagram symbol.
(a)
This is a device that converts one form of energy to other form. It converts the measurand to a usable electrical signal.
(a)
The active transducer are self generating devices which operate under the energy conversion principle.
True
False
This is ability of transducer to withstand overload and protection measures.
(a)
Name this ladder diagram symbol.
(a)
Pneumatics comes from the Greek work pneuma, which means?
(a)
The IEC 61131-3 standard specifies five distinct forms of programming language for industrial controllers:
Please select 2 correct answers.
Ladder Diagram (LD)
Instruction List (IL)
Structured Test (ST)
Function Black Diagram (FBD)
Sequential Function Control (SFC)
Name this ladder diagram symbol.
(a)
Most thermocouple signal conditioners usually display the temperature directly and/or provide a voltage that is not proportional to the thermocouple temperature.
False
True
This is an electrical switch actuated by an electromagnet coil.
(a)
This is a device used to measure strain on an object.
(a)
This is a phenomenon in which a temperature difference between two dissimilar electrical conductors or semiconductors produces a voltage difference between the two substances.
(a)
This is used to produce the compressed air for the pneumatic system by the required volume and pressure.
(a)
These transducers are those transducers in which the resistance change due to the change in some physical phenomenon.
(a)
This is the transmission and control of forces and movements by means of compressed air.
(a)
Name this ladder diagram symbol.
(a)
The electronic schematic symbol of?
SPDT Relay
SPST Relay, Normally Close Contact
DPDT Relay
SPST Relay, Normally Open Contact
In preparation of the compressed air, it should be considered the acceptable humidity to reduce __________ and __________.**Use comma to separate your answer**
(a)
What does LVDT stand for?
(a)
Name this ladder diagram symbol.
(a)
This is a thermoelectric device for measuring temperature, consisting of two wires of different metals connected at two points, a voltage being developed between the two junctions in proportion to the temperature difference.
(a)
This is the energy transmitted and controlled by means of a pressurized fluid, either liquid or gas.
(a)
What does PLC stand for?
(a)
When a pair of electrical conductors are joined together, a thermal emf is generated when the junctions are at same temperatures.
False
True
In primary levels of pneumatic system, input elements are used such as: (4)
Service Unit
Proximity Switches
Push-Button Valves
Air Barrier
Roller-Lever Valves
The Air Service Unit is a combination of:
**RIGHT MINUS WRONG**(3)
Regulator
Lubricator
Filter
Refiller
Revolver
The electronic schematic symbol of?
DPDT Relay
SPST Relay, Normally Open Contact
SPST Relay, Normally Close Contact
SPDT Relay
Name this ladder diagram symbol.
(a)
Name this ladder diagram symbol.
(a)
