Question 1

In force-voltage analogy, velocity is analogous to

Accepted Answer

A)  current
B)  charge
C)  inductance
D)  capacitance A

Question 2

The transient response, with feedback system,

Accepted Answer

A)  rises slowly
B)  rises quickly
C)  decays slowly
D)  decays quickly D

Question 3

The viscous friction co-efficient, in force-voltage analogy, is analogous to

Accepted Answer

A)  charge
B)  resistance
C)  reciprocal of inductance
D)  reciprocal of conductance B

Question 4

Mass, in force-voltage analogy, is analogous to

Accepted Answer

A)  charge
B)  current
C)  inductance
D)  resistance

Question 5

From which of the following transfer function can be obtained ?

Accepted Answer

A)  signal flow graph
B)  analogous table
C)  output-input ratio
D)  standard block system

Question 6

Transfer function of a system is used to calculate which of the following ?

Accepted Answer

A)  the order of the system
B)  the time constant
C)  the output for any given input
D)  the steady state gain

Question 7

Which of the following statements is correct for a system with gain margin close to unity or a phase margin close to zero ?

Accepted Answer

A)  the system is relatively stable
B)  the system is highly stable
C)  the system is highly oscillatory
D)  none of the above

Question 8

A controller, essentially, is a

Accepted Answer

A)  sensor
B)  clipper
C)  comparator
D)  amplifier

Question 9

load disturbances depend ?

Accepted Answer

A)  frequency
B)  loop gain
C)  forward gain
D)  all of the above

Question 10

In electrical-pneumatic system analogy the current is considered analogous to

Accepted Answer

A)  velocity
B)  pressure
C)  air flow
D)  air flow rate

Question 11

The temperature, under thermal and electrical system analogy, is considered analogous to

Accepted Answer

A)  voltage
B)  current
C)  capacitance
D)  charge

Question 12

Zero initial condition for a system means

Accepted Answer

A)  input reference signal is zero
B)  zero stored energy
C)  ne initial movement of moving parts
D)  system is at rest and no energy is stored in any of its components

Question 13

In liquid level and electrical system analogy, voltage is considered analogous to

Accepted Answer

A)  head
B)  liquid flow
C)  liquid flow rate
D)  none of the above

Question 14

The transient response of a system is mainly due to

Accepted Answer

A)  inertia forces
B)  internal forces
C)  stored energy
D)  friction

Question 15

In an automatic control system which of the following elements is not used ?

Accepted Answer

A)  error detector
B)  final control element
C)  sensor
D)  oscillator

Question 16

signal will become zero when the feedback signal and reference signs are equal.

Accepted Answer

A)  input
B)  actuating
C)  feedback
D)  reference

Question 17

Due to which of the following reasons excessive bond width in control systems should be avoided ?

Accepted Answer

A)  it leads to slow speed of response
B)  it leads to low relative stability
C)  noise is proportional to band width
D)  none of the above

Question 18

In a control system the output of the controller is given to

Accepted Answer

A)  final control element
B)  amplifier
C)  comparator
D)  sensor

Question 19

The band width, in a feedback amplifier.

Accepted Answer

A)  remains unaffected
B)  decreases by the same amount as the gain increase
C)  increases by the sane saaaajajt as the gain decrease
D)  decreases by the same amount as the gain decrease

Question 20

In a stable control system backlash can cause which of the following ?

Accepted Answer

A)  underdamping
B)  overdamping
C)  poor stability at reduced values of open loop gain
D)  low-level oscillations

Exam 2: Control Systems and Analogies