chapter-5-network-modeling-4

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MULTIPLE CHOICE

1. Almost all network problems can be viewed as
special cases of the

a.

transshipment problem.

b.

shortest path problem.

c.

maximal flow problem.

d.

minimal spanning tree problem.

2. The arcs in a network indicate all of the
following except?

a.

routes

b.

paths

c.

constraints

d.

connections

3. A factory which ships items through the
network would be represented by which type of node?

a.

demand

b.

supply

c.

random

d.

decision

4. A node which can both send to and receive
from other nodes is a

a.

demand node.

b.

supply node.

c.

random node.

d.

transshipment node.

5. Demand quantities for demand nodes in a
transshipment problem are customarily indicated by

a.

positive numbers.

b.

negative numbers.

c.

imaginary numbers.

d.

either positive or negative numbers.

6. Decision variables in network flow problems
are represented by

a.

nodes.

b.

arcs.

c.

demands.

d.

supplies.

7. The number of constraints in network flow
problems is determined by the number of

a.

nodes.

b.

arcs.

c.

demands.

d.

supplies.

8. How many constraints are there in a
transshipment problem which has n nodes and m arcs?

a.

n

b.

m

c.

n + m

d.

m- n

9. In a transshipment problem, which of the
following statements is a correct representation of the balance-of-flow rule if
Total Supply < Total Demand?

a.

Inflow- Outflow³ Supply or Demand

b.

Inflow + Outflow³ Supply or Demand

c.

Inflow- Outflow£ Supply or Demand

d.

Inflow + Outflow£ Supply or Demand

10. Supply quantities for supply nodes in a
transshipment problem are customarily indicated by

a.

positive numbers.

b.

negative numbers.

c.

imaginary numbers.

d.

either positive or negative numbers.

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