61.

**Answer: (c)**

62. The Laplace transforms of tu(๐ก) and ๐ข (๐ก−5) is respectively:

**Answer: (a)**

63. A causal discrete-time LTI system with transfer function is given by:

The given system will be:

(a) Observable

(b) Non causal

(c) Stable

(d) Unstable

(a) Observable

(b) Non causal

(c) Stable

(d) Unstable

**Answer: (c)**

64. If a signal is not bandlimited strictly or the sampling frequency is less than 2 f๐, error occurred is called:

(a) Cross talk

(b) Jitter

(c) Eye opening

(d) Aliasing

(a) Cross talk

(b) Jitter

(c) Eye opening

(d) Aliasing

**Answer: (d)**

65. An ideal reconstruction filter cannot be used for real-time applications since it is:

(a) Non-linear

(b) Non-causal

(c) Unstable

(d) Stable

(a) Non-linear

(b) Non-causal

(c) Unstable

(d) Stable

**Answer: (b)**

66. Which of the following are the popular structures in practice for FIR system?

1. Direct form

2. Transformed form

3. Cascade form

4. Frequency sampling realization

5. Lattice structure realization

1. Direct form

2. Transformed form

3. Cascade form

4. Frequency sampling realization

5. Lattice structure realization

(a) 1, 2, 3 and 4 only

(b) 2, 3, 4 and 5 only

(c) 3, 4 and 5 only

(d) 1, 2, 3, 4 and 5

(b) 2, 3, 4 and 5 only

(c) 3, 4 and 5 only

(d) 1, 2, 3, 4 and 5

**Answer: (d)**

67. Which of the following are the advantages of using a feedback in control system?

1. Reduces sensitivity

2. Improves the transient response

3. Minimize the effects of disturbance signals

1. Reduces sensitivity

2. Improves the transient response

3. Minimize the effects of disturbance signals

(a) 1 and 2 only

(b) 1 and 3 only

(c) 2 and 3 only

(d) 1, 2 and 3

(b) 1 and 3 only

(c) 2 and 3 only

(d) 1, 2 and 3

**Answer: (d)**

68. Consider the following statements in a signal flow graph:

1. Source: It is a node with only outgoing branches

2. Sink: It is a node with only incoming branches

3. Path: It is the traversal of connected branches in the direction of branch arrows such that one node is traversed more than once

1. Source: It is a node with only outgoing branches

2. Sink: It is a node with only incoming branches

3. Path: It is the traversal of connected branches in the direction of branch arrows such that one node is traversed more than once

Which of the above defined signal flow terms are correct?

(a) 1, 2 and 3

(b) 1 and 3 only

(c) 1 and 2 only

(d) 2 and 3 only

(a) 1, 2 and 3

(b) 1 and 3 only

(c) 1 and 2 only

(d) 2 and 3 only

**Answer: (c)**

69. Consider the following characteristic equation:

The number of roots in the right half of ๐ -plane will be:

(a) 4

(b) 3

(c) 2

(d) 1

(a) 4

(b) 3

(c) 2

(d) 1

**Answer: (c)**

70. A decade is defined for range of frequencies:

**Answer: (a)**

## 0 comments:

## Post a Comment