MTH601 Midterm Past Paper June 2014

1. The first step in a problem solving exercises in OR is the ________that exist in the system. Construction of the model of problem

Identification o f the problem

Solution of the problem

2. A requirement for the definition of the problem in OR is that _________must be clearly defined which helps to focus attention on what the problem is

Method

Objective

Solution

3. In a network flow diagram, time follows from_________

Left to right

Right to left Any direction

4. The dummy activities consume

No time,no resources

No time but some resources Some resources in minimum time All resources in a given time

5. In a national highway system interestion of two or more roads has the same analogy as the ______in the network flow diagram.

Branch Critical activity Flow

Node

6. Best possible time estimate that a given activity would take under normal conditions which often exist, is called

Most likely time estimate

Pessimistic time estimate Smallest time estimate Activity time estimate

7. In ______, activity time estimates are distributed according to beta distribution

MTH601-Midterm (June 7, 2014)

PERT

CPM Project Network Float

8. If we have 2,4 and 12 hours as the optimistic(t0) most likely (tm) and pessimistic(tp) then the expected time for the activity would be
9. If t0=2 tm=5 and tp=14 then SD=__________
10. IF t0=6,tm=12 and tp=18 then Vt=_______
11. The graphical method for solving a linear programming problem is applicable when

Two variables are involved

Three variables are involved Any number of variables are involved

12. Which of the following is equivalent relation to the constraint x=2 of a linear programming problem? X≥2 x≤2 x<2 and x≥2

x<2 and X>2

13. While using simplex method for a LPP if there are 4 standard equations in 8 variables then number of non basic variables will be _______

14. X1 X2 R1 R2

Q15. In the purchasing model without any shortage(Wilsonsmodel) which of the following quatitiy does not vary?

Supply

Demand

Inventory Transportation cost

16. How many decision variables are involved in the inventory model with shortages? One

Two Three Four

Q17. Which of the following rule is used in order to minimize the decision variables in any inventory model?

Derivative test Simplex method PERT Graphical method 18. R→0 R=D R>D or R<D R→∞

19. ABC analysis depends on the

Quality of materials Cost of materials