Signal Flow Graphs - Electronic Engineering (MCQ) questions & answers

1)   In signal flow graph, the product of all ______gains while going through a forward path is known as 'Path gain'.

a. Branch
b. Path
c. Node
d. Loop
Answer  Explanation 

ANSWER: Branch

Explanation:
No explanation is available for this question!


2)   The value of variables at each node is _________the algebraic sum of all signals arriving at that node.

a. Less than
b. Equal to
c. Greater than
d. None of the above
Answer  Explanation 

ANSWER: Equal to

Explanation:
No explanation is available for this question!


3)   Two loops are said to be non-touching only if no common ______exists between them.

a. Loop
b. Feedback path
c. Branch
d. Node
Answer  Explanation 

ANSWER: Node

Explanation:
No explanation is available for this question!


4)   For which systems are the signal flow graphs applicable?

a. Causal
b. Invertible
c. Linear time invariant system
d. Dynamic
Answer  Explanation 

ANSWER: Linear time invariant system

Explanation:
No explanation is available for this question!


5)   While solving signal flow graph using Mason's gain equation, what does the second letter in two subscript notation of 'L' stand for?

a. Serial number of loop
b. Parallel number of loop
c. Number of touching loops
d. Number of non-touching loops
Answer  Explanation 

ANSWER: Number of non-touching loops

Explanation:
No explanation is available for this question!


6)   In a signal flow graph method, how is an overall transfer function of a system obtained?

a. Poisson's equation
b. Block diagram reduction rules
c. Mason's equation
d. Lagrange's equation
Answer  Explanation 

ANSWER: Mason's equation

Explanation:
No explanation is available for this question!


7)   Where are the dummy nodes added in the branch with unity gain?

a. At input & output nodes
b. Between chain nodes
c. Both a and b
d. None of the above
Answer  Explanation 

ANSWER: At input & output nodes

Explanation:
No explanation is available for this question!


8)   Which type of node comprises incoming as well as outgoing branches?

a. Source node
b. Sink node
c. Chain node
d. Main node
Answer  Explanation 

ANSWER: Chain node

Explanation:
No explanation is available for this question!


9)   According to signal flow graph, which among the following represents the relationship between nodes by drawing a line between them?

a. Branch
b. Self-loop
c. Semi-node
d. Mesh
Answer  Explanation 

ANSWER: Branch

Explanation:
No explanation is available for this question!


10)   In a signal flow graph, nodes are represented by small _____

a. Circles
b. Squares
c. Arrows
d. Pointers
Answer  Explanation 

ANSWER: Circles

Explanation:
No explanation is available for this question!