Robotics Ch 6 - 9
_____ devices operate within the transmission path and alter the flow of power. A. Control B. Load C. Cycle D. Commutator
A. Control
_____ systems are machines that change the position or speed of a mechanical object in response to system feedback. A. Servo B. Synthesized C. Synchronous D. Timing
A. Servo
In a closed-loop system, the signal or data that provides information about interaction between the control unit and the load is called _____. A. feedback B. cycle timing C. comparator D. Slip
A. feedback
The coil wires wrapped around the electromagnets in the stator are called _____. A. field windings B. brushes C. flux D. mechanical fuses
A. field windings
In _____ systems, air, liquid, or a combination of both is used to transfer power. A. fluid power B. hydraulic C. pneumatic D. All of the above.
A. fluid power or D. All of the above.
A(n) _____ system produces mechanical energy by combining fluid power and electrical power systems. A. hybrid B. pneumatic C. hydraulic D. efficient
A. hybrid
Controlling the rate of fluid flow is known as _____. A. metering B. conditioning C. filtering D. pressurizing
A. metering
Fluid pressure in a hydraulic system is monitored by ____. A. pressure indicators B. metering C. pressure regulator valves D. the load device
A. pressure indicators
A _____ is a component of a hydraulic system that provides the initial power for movement in the system. A. prime mover B. desiccant C. regulator valve D. flow control device
A. prime mover
The ______ is the heart of a fluid system. A. pump B. fluid C. regulator D. pressure indicator
A. pump
In fluid power systems, friction is called ____. A. resistance B. heat exchange C. force D. inertia
A. resistance
A combination of components that work together to form a unit is a(n) ____. A. system B. subsystem C. armature D. cycle
A. system
_____ is considered virtually incompressible. A. Air B. Hydraulic fluid C. The combination of air and liquid D. All of the above.
B. Hydraulic fluid
The process of removing contaminants from pressurized air is called ____. A. filtering B. conditioning C. metering D. pressurizing
B. conditioning
The _____ unit of an industrial robot determines its flexibility and efficiency. A. timing B. control C. sensing D. power
B. control
As the mechanical load on a dc motor increases, the motor speed _____. A. increases B. decreases C. stays the same D. cannot be measured
B. decreases
Using ____ control devices, fluid flow can be started, stopped, or reversed without causing a significant change in pressure or flow rate. A. pressure B. direction C. flow D. temperature
B. direction
In a fluid power system, the ____ device is the component that is ultimately controlled. A. pump B. load C. fluid motor D. force
B. load
The _____ is the rotating component of a motor and includes the armature, shaft, and associated parts. A. stator B. rotor C. commutator D. detector
B. rotor
In electrical systems, a ____ system signals a response to a particular form of energy. A. timing B. sensing C. control D. power
B. sensing
The difference between the synchronous speed and the rotor speed is called _____. A. torque B. slip C. cemf D. flux
B. slip
A _____ is an in-line fluid conditioning device that captures large particles of foreign matter. A. filter B. strainer C. desiccant D. rotary vane
B. strainer
When subsystems are combined, the result is referred to as a ____. A. cycle B. synthesized system C. transmission path D. digital system
B. synthesized system
Force is normally expressed in units of ____. A. pressure B. weight C. power D. Inertia
B. weight
A(n) _____ system provides a lapse in time before the load device becomes energized. A. cycle timing B. interval timing C. delay timing D. All of the above.
C. delay timing
In-line and T filers contain a desiccant, which removes _____ from fluid in pneumatic systems. A. large particles B. small debris C. moisture D. heat
C. moisture
The amount of force applied to a specific area is _____. A. turbulence B. flow C. pressure D. resistance
C. pressure
The _____ valve in a pneumatic system allows air pressure to be adjusted to a specific level. A. pressure indicator B. pressure relief C. pressure regulator D. flow indicator
C. pressure regulator
A ____ valve is a control device in a hydraulic system that protects against stress and damage caused by overpressure. A. strainer B. power C. pressure relief D. flow control
C. pressure relief
The process of converting alternating current power to direct current is called _____. A. work B. control C. rectification D. cycle timing
C. rectification
DC stepping motors are primarily used to change electrical pulses into _____. A. dc power B. feedback signals C. rotary motion D. input commands
C. rotary motion
A _____ motor has a solid rotor, called a squirrel cage rotor. A. universal B. three-phase synchronous C. single-phase induction D. dc stepping
C. single-phase induction
The rotary motion, or turning force, of an electric motor is called _____. A. work B. friction C. torque D. feedback
C. torque
What kind of system describes: Continually at work making adjustments that alter machine operation?
Control systems
_____ timing systems may include both interval and delay timing to provide energizing action in an operational sequence.
Cycle
Control in mechanical systems is accomplished by changing _____. A. pressure B. direction C. speed D. All of the above.
D. All of the above.
Fluid pumps convert the force of moving fluid into rotary motion using ____. A. vanes B. gears C. pistons D. All of the above.
D. All of the above.
Which of the following is not an example of a heat exchanger device? A. Force-air fan unit B. Water-jacket cooler C. Gaseous cooling unit D. FRL unit
D. FRL unit
The _____ compares the feedback signal from the controlled element to a reference signal or standard. A. end effector B. rotor C. controller D. comparator
D. comparator
A _____ dc motor has two sets of field windings. A. shunt-wound B. permanent-magnet C. series-wound D. compound-wound
D. compound-wound
A(n) ____system transfers power from one point to another through mechanical motion that is used to do work. A. sensing B. optoelectronic C. timing D. electromechanical
D. electromechanical
The _____ is a subsystem that displays information about operating conditions at points throughout the system. A. timing B. control C. channel D. indicator
D. indicator
A ____ adds a small amount of oil to the air after it leaves the regulator in a pneumatic system. A. desiccant B. strainer C. filter D. lubricator
D. lubricator
In a pneumatic system, the ____ holds pressurized air and serves as the reservoir for the system. A. FRL unit B. transmission line C. reciprocating pump D. storage tank
D. storage tank
A(n) _____ motor is comprised of a rotor and a stator assembly, and contains no brushes, commutators, or slip rings. A. universal B. dc stepping C. induction D. synchronous
D. synchronous
Abrupt changes in the direction of fluid flow create A. inertia B. pressure C. weight D. turbulence
D. turbulence
What is the difference between alternating and direct current?
DC current only flows in one direction. AC alternates direction.
What kind of system describes: Numeric instructions are changed into a series of on/off electrical signals?
Digital systems
True or False. A non-positive displacement pump moves a definite amount of fluid with each revolution.
False
True or False. Direction control devices alter the volume or flow rate of the fluid.
False
True or False. Examples of loads include digital meters, pressure gauges, tachometers, and thermometers.
False
True or False. Horsepower is a measure of the amount of current produced over a specified amount of time.
False
True or False. In bifilar construction, three separate wires are simultaneously wound into the stator coil slots.
False
True or False. Pressure is the gravitational force exerted on a body by the earth.
False
True or False. Resistance in a fluid power system causes reduced pressure in the system.
False
True or False. Single-phase ac power consists of three alternating currents that vary by 120°.
False
True or False. The micron rating of a filter refers to how much power it requires to operate.
False
True or False. The transmission path of a hydraulic system is often electrical lines and circuitry.
False
True or False. Timing systems convert electrical energy into mechanical motion.
False
True or False. When air is compressed, both its pressure and volume are increased.
False
Identify the basic parts of a DC motor.
Great! :3
Explain how the horsepower of a motor is related to its performance.
It measures the work a motor can perform over a specific time.
What kind of system describes: Produce some form of mechanical motion.
Mechanical systems
Describe the characteristics of non-servo, or open-loop, control systems.
Open loop control systems are used for manual control operation, they come in 2 varieties full control and partial Non servo uses sequence mechanical steps to control the end point positions of the robot arm.
What kind of system describes: Signal a response to a particular form of energy?
Sensing systems
What kind of system describes: Machines that change the position or speed of a mechanical object?
Servo systems
What kind of system describes: The combination of multiple subsystems?
Synthesized systems
What is the correlation between slip and torque?
They are directly proportional.
How are timing systems used in the operation of industrial robots?
They turn a device on or off at a specific time.
What kind of system describes: Ensure that all actions of an operation occur at a precisely defined interval?
Timing systems
True or False. A check valve permits fluid flow in only one direction.
True
True or False. A digital system is a set of components that work together to process numeric information.
True
True or False. As temperature increases, the volume of the air in a pneumatic system also increases.
True
True or False. Fluid energy is lost in a fluid power system because it is changed into heat due to friction and resistance.
True
True or False. Force is any factor that produces or modifies the motion of an object.
True
True or False. Four-way valves are used to start, stop, or reverse the direction of fluid flow.
True
True or False. In a mechanical system, control is accomplished by changing pressure, direction, force, and speed.
True
True or False. In a series-wound de motor, the armature and field circuits are connected in a series arrangement.
True
True or False. In an electric motor, the armature is an electromagnet.
True
True or False. In an internal-gear rotary pump, the idler gear has fewer teeth than the rotor.
True
True or False. Open-loop control systems use sequencers and mechanical stops to control the end point positions of the robot arm.
True
True or False. Pascal's law states that pressure applied to a confined fluid is transmitted, undiminished, throughout the fluid.
True
True or False. Return air in a pneumatic system is exhausted into the atmosphere.
True
True or False. The counter electromotive force flows against the voltage coming into a dc motor.
True
True or False. The most common source of power for synthesized systems is alternating current (ac).
True
True or False. The transmission path provides a channel for the transfer of energy.
True
True or False. Work occurs when energy is transformed into mechanical motion, heat, light, chemical action, or sound.
True
____ occurs when energy is transformed into mechanical motion, light, heat, chemical action, or sound.
Work
As the armature of a dc motor rotates, it generates its own voltage called _______.
counter electromagnetic force(CEMF)
The ______ of a sensing system outputs a signal that is used to control the load device.
detector
The ______ receives data from both the input source and the output device, and determines if a correction signal should be sent to the actuator.
error detector
Changes in the field current result in corresponding changes in the _____ of the electromagnetic field.
flux
A _______ open-loop system simply turns the system off or on.
full control
The ______ rating of a motor represents the power of the motor.
horsepower
In a mechanical system, _____ measure physical quantities, such as pressure, speed, and force.
indicators
Flexible, fiber-optic rods that transfer light energy from its source to distant locations are called _______.
light pipes
In an automated system, the part(s) designed to produce work is referred to as the _____.
load
Examples of ______ in automated systems include electric motors, heating systems, lighting systems, alarms, and mechanical actuators.
loads
The _____ is the rotating part of a motor that creates torque.
rotor
A(n) _____ motor is the only dc motor that can also be operated using ac power.
series wound DC
