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Control Systems Multiple Choice Questions | MCQs | Quiz

Control Systems Interview Questions and Answers
Practice Control Systems questions and answers for interviews, campus placements, online tests, aptitude tests, quizzes and competitive exams.

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•   Robotic Mechanisms
•   Transfer Functions
•   Algebra Block Diagram
•   Signal Flow Graphs
•   Feedback Systems
•   Disturbance Signal Effect
•   Linearizing Effect
•   Nonlinear Systems
•   Controller Components-1
•   Controller Components-2
•   Stepper Motors
•   Hydraulic Systems
•   Pneumatic Systems
•   Standard Signals Test
•   First Order Systems
•   Second Order Systems-1
•   Second Order Systems-2
•   Second Order Systems-3
•   Second Order Systems-4
•   Steady-State Errors
•   Zero System Effect - 1
•   Zero System Effect - 2
•   Higher-Order Systems
•   Performance Indices
•   Robotic Control System-1
•   Robotic Control System-2
•   State Variable Analysis-1
•   State Variable Analysis-2
•   Lower Order Systems
•   Stability Concept
•   Stability Conditions
•   Routh-Hurwitz Stability
•   Relative Stability Analysis
•   Root Locus Concepts
•   Root Locus
•   Root Loci Construction
•   Frequency Response
•   Time & Frequency
•   Polar Plots
•   Bode Plots
•   Minimum-Phase Systems
•   Transfer Functions
•   Mathematical Preliminarie
•   Nyquist Stability Criterion
•   Time Domain Analysis
•   Relative Stability
•   Closed-Loop Frequency
•   Design Problem
•   Classical Design
•   Basic Compensators
•   Cascade Compensation
•   Frequency Domain
•   PID Controllers
•   Feedback Compensation
•   Spectrum Analysis
•   Signal Reconstruction
•   Difference Equations
•   Z-Transform
•   Z-Transfer Function
•   Inverse Z-transform
•   Z-transform Analysis
•   Z & S Relationship
•   Stability Analysis
•   Compensation Technique
•   State Variables & Model
•   Linear State Models
•   State Variables
•   Diagonalization
•   State Equations Solution
•   Controlability
•   Pole Placement
•   Observer Systems
•   Liapunov's Stability - 1
•   Liapunov's Stability - 2
•   Linear Systems
•   Servomechanims
•   Optimal Control Problem1
•   Optimal Control Problem2
•   State Regulator Problem
•   Time Regulator Problem
•   Tracking Problem
•   Parameter Optimization
•   Physical Nonlinearities
•   Nonlinear Stability - 1
•   Nonlinear Stability - 2
•   Phase-Trajectories - 1
•   Phase-Trajectories - 2
•   Stability Analysis
•   Adaptive Control
•   Fuzzy Logic Control
•   Neural Networks

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Control Systems Questions and Answers – Stepper Motors

Posted on May 21, 2017 by Manish

This set of Control Systems Multiple Choice Questions & Answers (MCQs) focuses on “Stepper Motors”.

1. A variable reluctance stepper motor is constructed of ______________ material with salient poles.
a) Paramagnetic
b) Ferromagnetic
c) Diamagnetic
d) Non-magnetic
View Answer

Answer: b
Explanation: A variable reluctance stepper motor is the motor that has motion in steps with respect to increase in time and constructed of ferromagnetic material with salient poles.
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2. In a three-stack 12/8-pole VR motor, the rotor pole pitch is
a) 15º
b) 30º
c) 45º
d) 60º
View Answer

Answer: c
Explanation: Pole pitch is defined as the number of armature slots to the pole pitch and here this has been converted into degrees.

3. A stepper motor having a resolution of 300 steps/rev and running at 2400 rpm has a pulse rate of- pps.
a) 4000
b) 8000
c) 6000
d) 10,000
View Answer

Answer: c
Explanation: Pulse per second is mathematically given as PPS = (Rpm/60)*(number of steps per minute).

4. If a hybrid stepper motor has a rotor pitch of 36º and a step angle of 9º, the number of its phases must be
a) 4
b) 2
c) 3
d) 6
View Answer

Answer: a
Explanation: Step angle is defined as =(Ns-Nr)/(Ns+Nr)*360.
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5. The rotor of a stepper motor has no
a) Windings
b) Commutator
c) Brushes
d) All of the mentioned
View Answer

Answer: d
Explanation: The rotor is the rotatory part of the motor of a stepper motor and has no windings, commutator and brushes.

6. A stepping motor is a ____________ device.
a) Mechanical
b) Electrical
c) Analogue
d) Incremental
View Answer

Answer: d
Explanation: A stepping motor is a motor in which the motion in the form of steps and is a incremental device i which as the time increases the steps are increased.

7. The rotational speed of a given stepper motor is determined solely by the
a) Shaft load
b) Step pulse frequency
c) Polarity of stator current
d) Magnitude of stator current.
View Answer

Answer: b
Explanation: The stator part of a motor is the stationary part of the motor and rotational speed of a given stepper motor is given by the step pulse frequency.
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8. Which of the following phase switching sequence represents half-step operation of a VR stepper motor ?
a) A, B, C,A……..
b) A, C, B,A…….
c) AB, BC, CA, AB……..
d) A, AB, B, BC……..
View Answer

Answer: d
Explanation: In the half step operation of a Variable reluctance motor physical step resolution is multiplied by 2 and control signals appear to be digital rather than analog.

9. A stepper motor may be considered as a ____________ converter.
a) Dc to dc
b) Ac to ac
c) Dc to ac
d) Digital-to-analogue
View Answer

Answer: d
Explanation: A stepper motor is a motor in which the motion is in steps and it is an increemental device and may be considered as a digital to analog converter.

10. What is the step angle of a permanent-magnet stepper motor having 8 stator poles and 4 rotor poles?
a) 60º
b) 45º
c) 30º
d) 15º
View Answer

Answer: b
Explanation: Step angle is defined as =(Ns-Nr)/(Ns+Nr)*360 where Ns is the number of stator poles and Nr is the number of rotor poles.

Sanfoundry Global Education & Learning Series – Control Systems.
To practice all areas of Control Systems, here is complete set of 1000+ Multiple Choice Questions and Answers.

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