This set of Flexible Manufacturing System Multiple Choice Questions & Answers (MCQs) focuses on “Material Transport System – Vehicle Guidance Technologies”.
1. Which system defines and controls the AGV’s in defined pathways?
a) Operator System
b) Guidance System
c) Loading System
d) Unloading System
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Explanation: Automated Guided Vehicles are defined and controlled in defined pathways by the guidance system. In a warehouse or factory, Automated Guided Vehicles are designed to follow a defined path line. When it flows outside the pathway, it won’t function.
2. Which method uses electrical wires placed in a shallow channel cut inside the floor?
a) Piping Method
b) Nodular Method
c) Guided Wire Method
d) Two Wire Method
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Explanation: The electrical wires were placed in a shallow channel that was cut inside the surface of the floor in guided wire method. After the guide wire is placed inside the ground, the channel is filled with cement to eliminate discontinuity.
3. What is the frequency range used in guided wire method?
a) 0-1 MHz
b) 1-15 kHz
c) 0.1-0.15 kHz
d) 10-20 mHz
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Explanation: Frequency Generator will be connected to the guided wire which is attached inside the floor. Low voltage and low frequency is used in this technique. The typical frequency range used in this technique is about 1-15 kHz.
4. Which field is generated in guided wire method?
a) Viscous Fluid
b) Magnetic Field
c) Electrical Field
d) Thermal Fluid
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Explanation: A magnetic field is usually generated in the guided wire method. This is induced along the pathways of the vehicle in a fixed route. It is followed by the sensors which are mounted on the vehicle to follow the correct path.
5. How many sensors are mounted on the vehicle in guided vehicle method?
a) Four
b) Three
c) One
d) Two
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Explanation: There will be two sensors mounted on each side of the vehicle in the guided vehicle method. The sensors receive signal from the induced magnetic field and follow along the path generated by the guided wires.
6. The intensity of the magnetic field will be equal if the guided path changes direction.
a) True
b) False
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Explanation: The intensity of the magnetic field becomes unequal if the guided path changes the direction. The difference in the intensity of the magnetic field is monitored and used to control the steering motor.
7. Which of the following method allows the vehicle to move into two separate paths with different frequencies?
a) Switching Method
b) Alternator Method
c) Path Switch Select Method
d) Frequency Select Method
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Explanation: The Frequency select method allows the vehicle to move into two separate paths with different frequencies. In order to determine its location, the vehicle reads an identification code on the floor when it enters the switch.
8. Which of the following method operates with a single frequency throughout the guide path layout?
a) Operator Method
b) Pathway Method
c) Frequency Select Method
d) Path Switch Select Method
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Explanation: In order to operate with a single frequency throughout the guide path layout, path switch select method is used. The power will be turned off in all other branches except the path the vehicle is to travel on.
9. Which of the following type of sensors are capable of tracking the paint?
a) Insulated Sensors
b) Thermal Sensors
c) Magnetic Sensors
d) Optical Sensors
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Explanation: In order to track the paint which is the desired path of the vehicle, optical sensors are used. The paints can be sprayed, painted or taped on the floor. The drawback of painting the pathways is that it deteriorates with time.
10. Magnetic Tape is based on active guidance technology.
a) False
b) True
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Explanation: Magnetic Tape is based on passive guidance technology. In order to define the pathways, it is installed on the floor surface. This technique eliminates the cutting of floor surface unlike imbedded guide wire method.
11. What type of particles can be seen in a paint strip?
a) Dark Particles
b) Fluorescent Particles
c) Phosphate Particles
d) Ductile Particles
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Explanation: Fluorescent Particles can be seen in a paint strip. Fluorescence is the ability of a particle to reflect the light falling on it. These particles reflect an ultra violet light source from the vehicle which is used to guide the vehicle.
12. What is meant by LGV in the material transport system?
a) Low Geared Vehicle
b) Locomotive Guided Vehicle
c) Laser Guided Vehicle
d) Light Geared Vehicle
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Explanation: The abbreviated form of LGV is Laser Guided Vehicle in the material transport system. It has the ability to operate without the continuously defined pathways. It is one of the advanced techniques following material transport system.
13. Which refers to the capability of a vehicle to follow a fixed route in the absence of pathways on the floor?
a) Dead Reckoning
b) Live Reckoning
c) Modest Reckoning
d) Modular Reckoning
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Explanation: The capability of a vehicle to follow a fixed route in the absence of pathways on the floor is known as Dead Reckoning. It is accomplished by computing the desired number of wheel rotations with respect to specified steering angles.
14. Which of the following is used to position the Laser Guided Vehicles?
a) Guided Wires
b) Reflective Beacons
c) Resistors
d) Diaphragms
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Explanation: The Laser Guided Vehicles are positioned using reflective beacons. It is done by periodically verifying the calculated position with one or more known positions. It is implemented throughout the plant on columns, walls and machines.
15. Which of the following technique uses on board gyroscopes?
a) Modular Guidance
b) Angular Guidance
c) Dead Reckoning
d) Inertial Guidance
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Explanation: In order to determine the position of the vehicle based on its change in speed and acceleration, inertial guidance technique is followed. It involves the use of on board gyroscopes and motion sensors. It finds its applications in aircrafts and submarines.
16. Which of the following is embedded in the floor to correct any errors in AGV’s position?
a) Lead Wires
b) Aluminum Capstones
c) Switch Gears
d) Magnetic Transponders
View Answer
Explanation: While installing Automated Guided Vehicles, magnetic transponders are usually embedded in the floor. This is done along the desired pathway to correct any errors in the position of automated guided vehicles.
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