Control System Engineering MCQs | Page - 1

Explanation: in the block diagram of a basic control system we see that the reference input is passed through error detector or comparator. the signal which leaves the same is the algebraic sum of reference input and feedback as the feedback wire is connected to the detector, so we call it error

Explanation: feedback control systems are also referred to as closed loop systems. in a closed loop, the actuating error signals, which is the difference between the input signal and

Explanation: a linear system is one who obeys the principle of superposition. the principle of superposition states that the response produced by simultaneous application of two different forcing functions is equal to the sum of individual responses.

Explanation: stochastic control systems are those who have unpredictable and non- repeatable response due to involvement of random parameters. static systems is the

Explanation: the pressure inside the furnace is measured by pressure gauge. in case the pressure increases or decreases beyond the desired value, the controller and the actuator will cause a change in the position of the damper.

Explanation: a pneumatic system works due to pressure difference of air or any other gas. air at a pressure, pi is injected through the input manifold. it also consists of mass, coefficient of viscous friction and spring constant and the pressure difference created due to that, gives rise to pneumatic system.

Explanation: to analyze a thermal system and determine its transfer function the temperature of the medium should be uniform. if the temperature is varying or zero

Explanation: process control refers to control of five parameters which are level, flow, pressure, temperature, acidity of the process variable. a particular parameter has only one desired value.

Explanation: the feedback reduces the overall gain of the system. as soon as we introduce feedback in the system to make the system stable, gain is reduced.

Explanation: in a temperature control system, analog to digital conversion of signals take place. automatic systems don’t understand analog signals as they only take digital inputs in the form of 0 & 1 so we use a analog to digital converter which converts the signal.