Block Diagram and Signal Flow Graphs – 1 – 2

6. A node which has only outgoing branches is called a :

(a) input node
(b) output node
(c) mixed node
(d) general node

ANSWER

EXPLANATION

7. Three blocks with gains of 4,6 and 8 are connected in parallel The total gain of the arrangement is :

(a) 18
(b) 196
(c) 32
(d)
 52

ANSWER

EXPLANATION

8. Block diagrams can be used to represent :

(a) only linear system
(b) only nonlinear systems
(c) both linear and nonlinear systems
(d) time –invariant as well as time –varying systems

ANSWER

EXPLANATION

9. Three blocks with gains of 5, 8 and 4 are connected in cascade The total gain of the arrangement is :

(a) 17
(b) 160
(c) 44
(d) 37

ANSWER

EXPLANATION

10. A node which has both incoming branches is called a/an :

(a) input node
(b) output node
(c) mixed node
(d) general node

ANSWER

EXPLANATION

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