MCQ on Process Controller

Rajasthan Polytechnic Third Year Paper 2016 – Process Controller

In an open loop control system
(a) Output is dependent on input
(b) Input is dependent on output
(c) Output is independent of input
(d) None of the above

Flapper nozzle is used in ________controller
(a) Hydraulic
(b) Electronic
(c) Pneumatic
(d) Chemical

Response of a system to a sinusoidal input is
(a) Impulse response
(b) Step response
(c) Frequency response
(d) None of the above

Value of proportional band of a proportional controller with gain 2.5 will be
(a) 40%
(b) 25%
(c) 250%
(d) 100%

Permanent error in proportional controller is
(a) Drift
(b) Reset
(c) Gain
(d) Offset

The input impedance of an ideal OP-AMP is
(a) Zero
(b) Infinite
(c) Very small
(d) Unknown

Which type of control action is not used alone?
(a) Derivative
(b) Integral
(c) Proportional
(d) On-off

Which control is effective in removing offset?
(a) Proportional
(b) Derivative
(c) Integral
(d) On-off

In transfer function G(s), “s” stands for
(a) nepier frequency
(b) complex frequency
(c) sensitivity
(d) None

Which type of controller has more oscillations?
(a) Proportional
(b) Differential
(c) On-off
(d) Integral