A. Open loop system
B. Closed loop system
C. Both A. and B.
D. Neither A. nor B.
Related Mcqs:
- Which of the following statements is not necessarily correct for open control system ?
A. Input command is the sole factor responsible for providing the control action
B. Presence of non-linearities causes malfunctioning
C. Less expensive
D. Generally free from problems of non-linearities - A closed loop system is distinguished from open loop system by which of the following ?
A. Servomechanism
B. Feedback
C. Output pattern
D. Input pattern - A.C. servomotor resembles_____________?
A. two phase induction motor
B. Three phase induction motor
C. direct current series motor
D. universal motor - Which of the following statements is correct for any closed loop system ?
A. All the co-efficients can have zero value
B. All the co-efficients are always non-zero
C. Only one of the static error co-efficients has a finite non-zero value
D. None of the above - The transient response of a system is mainly due to________________?
A. inertia forces
B. internal forces
C. stored energy
D. friction - _____________is the reference input minus the primary feedback?
A. Manipulated variable
B. Zero sequence
C. Actuating signal
D. Primary feedback - Which of the following is the definition of proportional band of a controller ?
A. The range of air output as measured variable varies from maximum to minimum
B. The range of measured variables from set value
C. The range of measured variables through which the air output changes from maximum to minimum
D. Any of the above
F. None of the above - Static error coefficients are used as a measure of the effectiveness of closed loop systems for specified ___________ input signal?
A. acceleration
B. velocity
C. position
D. all of the above - Which of the following is an electromagnetically device ?
A. Induction relay
B. Thermocouple
C. LVDT
D. Any of the above
F. None of the above - The position and velocity errors of a type-2 system are_____________?
A. constant, constant
B. constant, infinity
C. zero, constant
D. zero, zero
