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OPERATIONS RESEARCHUNIT –V1) In Dynamic Programming Problems, the decisions are made in (a) Single stage (b) 2-stages (c) Multi-stages (d) No decision making process 2) In dynamic programming problems, the main problem is divided into sub problems. Each sub-problem is known as (a) Part (b) Stage (c)...

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OPERATIONS RESEARCH UNIT –V 1) In Dynamic Programming Problems, the decisions are made in (a) Single stage

(b) 2-stages

(c) Multi-stages

(d) No decision making process

2) In dynamic programming problems, the main problem is divided into sub problems. Each sub-problem is known as (a) Part

(b) Stage

(c) State

(d) Mini problem

3) The technique of Dynamic Programming problem is developed by (a) Taylor

(b) Gilberth

(c) Richard Bellman

(d) Bellman and Clarke

4) Another name used to Dynamic Programming is (a) Multistage problem

(b) Recursive optimization

(c) State problems

(d) No second name

5) If the outcome at any decision stage is unique and known for the problem, then the Dynamic programming problem is known as: (a) Probabilistic dynamic programming problem (b) Stochastic dynamic programming problem (c) Static dynamic programming problem (d) Deterministic dynamic programming problem 6) The possible decisions at any stage are known as (a) States

(b) Steps

(c) Parts

(d) None

7) The rule which determines the decision at each stage is known as (a) State

(b) Stage

(c) Policy

(d) Decision

8) Contractual maintenance or agreement maintenance with manufacturer is suitable for equipment, which is (a) In its infant state

(b) When machine is old one

(c) Scrapped

(d) None of the above.

9) When money value changes with time at 10 %, then PWF for first year is : (a) 1

(b) 0.909

(c) 0.852

(d) 0.9

10) Which of the following maintenance policies is not used in old age stage of a machine? (a) Operate up to failure and do corrective maintenance (b) Reconditioning (c) Replacement (d) Scheduled preventive maintenance 11) When money value changes with time at 20%, the discount factor for 2nd year is: (a) 1

(b) 0.833

(c) 0

(d) 0.6955

12) Which of the following replacement policies is considered to be dynamic in nature? (a) Time is continuous variable and the money value does not change with time, (b) When money value does not change with time and time is a discrete variable, (c) When money value changes with time (d) When money value remains constant for some time and then goes on changing with time. 13) When the probability of failure reduces gradually, the failure mode is said to be: (a) Regressive

(b) Retrogressive

(c) Progressive

(d) Recursive

14) The following replacement model is said to be probabilistic model: (a) When money value does not change with time and time is a continuous variable (b) When money value changes with time (c) When money value does not change with time and time is a discrete variable (d) Preventive maintenance policy

15) A machine is replaced with average running cost (a) Is not equal to current running cost (b) Till current period is greater than that of next period (c) If current period is greater than that of next period (d) If current period is less than that of next period 16) The curve used to interpret machine life cycle is (a) Bath tub curve

(b) Time curve

(c) Product life cycle

(d) Ogive curve

17) Decreasing failure rate is usually observed in ………………. stage of the machine (a) Infant

(b) Youth

(c) Old age

(d) Any time in its life

18) Which cost of the following is irrelevant to replacement analysis? (a) Purchase cost of the machine (b) Operating cost of the machine (c) Maintenance cost of the machine (d) Machine hour rate of the machine 19) The type of failure that usually occurs in old age of the machine is (a) Random failure

(b) Early failure

(c) Chance failure

(d) Wear-out failure

20) Group replacement policy is most suitable for: (a) Trucks

(b) Infant machines

(c) Street light bulbs

(d) New cars

21) The chance failure that occurs on a machine is commonly found on a graph of time Vs failure rate (on X and Y axes respectively as (a) Parabolic

(b) Hyperbolic

(c) Line nearly parallel to X-axis

(d) Line nearly parallel to Y-axis

22) Replacement of an item will become necessary when (a) Old item becomes too expensive to operate or maintain

(b) When your operator desires to work on a new machine (c) When your opponent changes his machine in his unit (d) When company has surplus funds to spend 23) The production manager will not recommend group replacement policy (a) When large numbers of identical items are to be replaced (b) In case Low cost items are to be replaced, where record keeping is a problem (c) For items that fail completely (d) For Reparable items 24) In replacement analysis the maintenance cost is a function of: (a) Time

(b) Function

(c) Initial investment

(d) Resale value

25) Replacement is said to be necessary if (a) Failure rate is increasing (b) Failure cost is increasing (c) Failure probability is increasing (d) Any of the above 26) In this stage, the machine operates at highest efficiency and its production rate will be high. (a) Infant stage

(b) Youth stage

(c) Old age

(d) None of the above

27) Replacement decision is very much common in this stage: (a) Infant stage

(b) Old age

(c) Youth

(d) In all the above

28) The replacement policy that is imposed on an item irrespective of its failure is (a) Group replacement

(b) Individual replacement

(c) Repair spare replacement

(d) Successive replacement

29) When certain symptoms indicate that a machine is going to fail and to avoid failure if maintenance is done it is known as: (a) Symptoms maintenance

(b) Predictive maintenance

(c) Repair maintenance

(d) Scheduled maintenance

30) In retrogressive failures, the failure probability ------------------ with time. (a) Increases

(b) Remains constant

(c) Decreases

(d) None of the above

31) Dynamic programming problems may be classified depending on the nature of data available as (a)Deterministic

(b) Probabilistic models

(c) Both (a) and (b)

(d) None of the above

32) In deterministic models of dynamic programming, the outcome at any decision stage is (a) unique, determined

(b) cannot be determined

(c) Stochastic

(d) None of the above

33) In dynamic programming models programming means (a) Scheduling

(b) Preparing

(c) Planning

(d) Producing

34) The mathematical technique of optimizing a sequence of inter-related decisions over period of time is called dynamic programming (a) Goal Programming

(b) Dynamic programming

(c) Integer programming

(d) linear programming

35) Which of the following is the correct assumption for replacement policy when money value does not change with time? (a) No Capital cost

(b) No scrap value

(c) Constant scrap value

(d) Zero maintenance cost

36) Which one of the following does not match the group? (a) Present worth Factor (PWF)

(b) Discounted rate (DR)

(c) Depreciation value (DV)

(d) Mortality Tables (MT)

37) Reliability of an item is (a) Failure Probability

(b) 1 / Failure probability

(c) 1 - failure probability

(d) Life period / Failure rate

38) The following is not discussed in group replacement policy: (a) Failure Probability (b) Cost of individual replacement (c) Loss due to failure (d) Present worth factor series 39) It is assumed that maintenance cost mostly depends on: (a) Calendar age (b) Manufacturing date (c) Running age (d) User’s age 40) Group replacement policy applies to: (a) Irreparable items (b) Reparable items (c) Items that fail partially (d) Items that fail completely 41) If a machine becomes old, then the failure rate expected will be: (a) Constant (b) Increasing (c) Decreasing (d) We cannot be said...