Which of the following can be measured by the use of a tachogenerator ?
(A) Acceleration
(B) Speed
(C) Speed and acceleration
(D) Displacement F. 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 devices is used for conversion of co-ordinates ?
(A) Microsyn
(B) Selsyn
(C) Synchro-resolver
(D) Synchro-transformer
A phase lag lead network introduces in the output_______________?
(A) lag at all frequencies
(B) lag at high frequencies and lead at low frequencies
(C) lag at low frequencies and lead at high frequencies
(D) none of the above
When the initial conditions of a system are specified to be zero it implies that the system is______________?
(A) at rest without any energy stored in it
(B) working normally with reference input
(C) working normally with zero reference input
(D) at rest but stores energy
When the initial conditions of a system are specified to be zero it implies that the system is________________?
(A) at rest without any energy stored in it
(B) working normally with reference input
(C) working normally with zero reference input
(D) at rest but stores energy
A differentiator is usually not a part of a control system because it______________?
(A) reduces damping
(B) reduces the gain margin
(C) increases input noise
(D) increases error
In a control system integral error compensation _________________ steady state error?
(A) increases
(B) minimizes
(C) does not have any effect on
(D) any of the above
An amplidyne can give which of the following characteristics ?
(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
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