Which of the following is measured by using a vector voltmeter ?
(A) Amplifier gain and phase shift
(B) Filler transfer functions
(C) Complex insersion loss
(D) All of the above
Various adjustments in an energy meter include_______________?
(A) light load or friction
(B) lag and creep
(C) overload and voltage compensation
(D) temperature compensation
(D) all of the above
An instrument transformer is used to extend the range of______________?
(A) induction instrument
(B) electrostatic instrument
(C) moving coil instrument
(D) any of the above
The rectifier instrument is not free from_______________?
(A) temperature error
(B) wave shape error
(C) frequency error
(D) all of the above
Most sensitive galvanometer is_____________?
(A) elastic galvanometer
(B) vibration galvanometer
(C) Duddlb galvanometer
(D) spot ballistic galvanometer
A control system working under unknown random actions is called______________?
(A) computer control system
(B) digital data system
(C) stochastic control system
(D) adaptive control system
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 open loop system_____________?
(A) the control action depends on the size of the system
(B) the control action depends on system variables
(C) the control action depends on the input signal
(D) the control action is independent of the output
A control system in which the control action is somehow dependent on the output is known as____________?
(A) Closed loop system
(B) Semiclosed loop system
(C) Open system
(D) None of the above
Which of the following is an open loop control system ?
(A) Field controlled D.C. motor
(B) Ward leonard control
(C) Metadyne
(D) Stroboscope