A. Constant current
B. Constant voltage
C. Constant current as well as constant voltage
D. Constant current, constant voltage and constant power
F. None of the above
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 - The second derivative input signals modify which of the following ?
A. The time constant of the system
B. Damping of the system
C. The gain of the system
D. The time constant and suppress the oscillations
F. None of the above - Which of the following statements is correct for a system with gain margin close to unity or a phase margin close to zero ?
A. The system is relatively stable
B. The system is highly stable
C. The system is highly oscillatory
D. None of the above - Transfer function of a system is used to calculate which of the following ?
A. The order of the system
B. The time constant
C. The output for any given input
D. The steady state gain - 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 - 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 - Which of the following is exhibited by Root locus diagrams ?
A. The poles of the transfer function for a set of parameter values
B. The bandwidth of the system
C. The response of a system to a step input
D. The frequency response of a system
F. None 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 - Pressure error can be measured by which of the following ?
A. Differential bellows and straingauge
B. Selsyn
C. Strain gauge
D. Strain gauge and potentiometer
