This set of Flexible Manufacturing System Multiple Choice Questions & Answers (MCQs) focuses on “Linear Motors”.
1. Which of the following motors provide linear motions directly?
a) Linear Motors
b) AC Motors
c) DC Motors
d) Induction Motors
View Answer
Explanation: The type of motor which provides the linear motion directly is known as linear motor. It does not require the need for converting rotary to linear motion. AC Motors, DC Motors and Induction motors do not provide linear motions directly.
2. How is the rotor termed as in linear motor terminology?
a) Modulator
b) Forcer
c) Inverter
d) Exciter
View Answer
Explanation: The rotor in linear motor terminology is usually termed forcer. This type of motors is designed such that either the motor or the track moves during its operation. Modulator, Inverter and exciter do not fall under rotor terminology.
3. Which of the following non conducting material is used in linear motors?
a) Mica
b) Epoxy
c) Glass
d) Rubber
View Answer
Explanation: The non conducting material which is used in linear motors is epoxy. The wire windings of the linear motors are usually enclosed in the non conducting material container. Mica, Glass and Rubber are not used as a non conducting material used in a linear motor.
4. Which is required by the linear motor to support the forcer and maintain a gap between forcer and magnetic track?
a) Polarizer
b) Repulser
c) Straight Guide ways
d) Exciter
View Answer
Explanation: Linear motors often require straight guide ways to support the forcer and maintain a gap between forcer and magnetic track. Polarizer, Repulser and Exciter were not used to support the forcer and maintain a gap between forcer and magnetic track.
5. Which is used to indicate the position and the speed of the forcer along the track?
a) Modular Encoders
b) Polar Encoders
c) Rotary Encoders
d) Linear Encoders
View Answer
Explanation: The device which used to indicate the position and the speed of the forcer along the track is known as linear encoder. On the other hand, rotary motors use rotary encoders.
6. In linear motors, mass of the forcer will be more than the mass of the track.
a) True
b) False
View Answer
Explanation: In linear motors, mass of the forcer will be less than the mass of the track. It is commonly used in positioning system where the mass will slide along the track.
7. Which of the following type of linear motors consists of single, flat track along which the forcer moves?
a) Flat
b) U-Tube
c) Cylindrical
d) Parabolic
View Answer
Explanation: The type of linear motors which consists of single, flat track along which the forcer moves is the flat type linear motors. U-Tube, Cylindrical and Parabolic type of linear motors do not consist if single, flat track providing the pathway for the forcer.
8. Which of the following type of linear motors consists of a track with cross sections having two parallel rails connected to the base to from a U shaped channel?
a) Flat
b) U-Tube
c) Cylindrical
d) Parabolic
View Answer
Explanation: The type of linear motors which consists of a track with cross sections having two parallel rails connected to the base to from a U shaped channel is known as U-Tube linear motors.
9. Which of the following type of linear motors consist of a round shaped forcer shaft that moves linearly inside a housing container?
a) Flat
b) U-Tube
c) Cylindrical
d) Parabolic
View Answer
Explanation: The type of linear motors which consist of a round shaped forcer shaft that moves linearly inside a housing container is known as cylindrical linear motors. In this design, housing will perform the function of a track.
10. It is safe to use linear motors for vertical lifting.
a) False
b) True
View Answer
Explanation: It is not generally advisable to use linear motors for vertical lifting. If the power supply is lost, then the load will fall causing the motor as well the operator to damage.
Sanfoundry Global Education & Learning Series – Flexible Manufacturing System.
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