Search
.Management Sciences
Category: Control Systems
An increase in gain, in most systems, leads to_____________?
A. smaller damping ratio
B. larger damping ratio
C. constant damping ratio
D. none of the above
The phase lag produced by transportation relays_____________?
A. is independent of frequency
B. is inverseh’proportional to frequency
C. increases linearly with frequency
D. decreases linearly with frequency
The first order control system, which is well designed, has a_______________?
A. small bandwidth
B. negative time constant
C. large negative transfer function pole
D. none of the above
In a stable control system backlash can cause which of the following ?
A. Underdamping
B. Overdamping
C. Poor stability at reduced values of open loop gain
D. Low-level oscillations
A car is raining at a constant speed of 50 km/h, which of the following is the feedback element for the driver ?
A. Clutch
B. Eyes
C. Needle of the speedometer
D. Steering wheel
F. None of the above
In force-voltage analogy, velocity is analogous to______________?
A. current
B. charge
C. inductance
D. capacitance
has tendency to oscillate______________?
A. Open loop system
B. Closed loop system
C. Both A. and B.
D. Neither A. nor B.
The capacitance, in force-current analogy, is analogous to_____________?
A. momentum
B. velocity
C. displacement
D. mass
Which of the following is an open loop control system ?
A. Field controlled D.C. motor
B. Ward leonard control
C. Metadyne
D. Stroboscope
If a step function is applied to the input of a system and the output remains below a certain level for all the time, the system is_____________?
A. not necessarily stable
B. stable
C. unstable
D. always unstable
F. any of the above
Recent Comments