Operations Research

81. The region common to all the constraints including the non-negativity restrictions is called the ______________.

  1. solution space
  2. unique solution
  3. optimum solution
  4. infeasible solution
Correct answer: (A)
solution space

82. A activity in a network diagram is said to be ______________ if the delay in its start will further delay the project completion time.

  1. forward pass
  2. backward pass
  3. critical.
  4. non-critical.
Correct answer: (C)
critical

83. Operation research approach is typically based on the use of ______________.

  1. physical model.
  2. mathematical model.
  3. iconic model.
  4. descriptive model.
Correct answer: (B)
mathematical model.

84. An Iso-profit line represents ______________.

  1. a boundary of the feasible region
  2. an infinite number of solution all of which yield the same cost
  3. an infinite number of solutions all of which yield the same profit
  4. an infinite number of optimal solutions
Correct answer: (C)
an infinite number of solutions all of which yield the same profit

85. If an artificial variable is present in the basic variable column of optimal simplex table, then the problem has ______________ solution.

  1. alternative
  2. no solution
  3. bounded
  4. infeasible
Correct answer: (D)
infeasible

86. The dummy source or destination in a transportation problem is added to ______________.

  1. satisfy rim conditions
  2. prevent solution from becoming degenerate
  3. ensure that total cost does not exceed a limit
  4. the solution not be degenerate
Correct answer: (A)
satisfy rim conditions

87. Which of the following methods is used to verify the optimality of the current solution of the transportation problem______________.

  1. Least cost method
  2. Vogel's Approximation method
  3. Row minima method
  4. Modified Distribution method
Correct answer: (D)
Modified Distribution method

88. For a salesman who has to visit n cities, following are the ways of his tour plan ______________.

  1. n!
  2. (n+a)!
  3. (n-a)!
  4. n
Correct answer: (C)
(n-a)!

89. Economic order quantity results in ______________

  1. equalisation of carrying cost and procurement cost
  2. favourable procurement price
  3. reduced chances of stock outs
  4. minimization of set up cost
Correct answer: (A)
equalisation of carrying cost and procurement cost

90. The problem of replacement is felt when job performing units fail ______________.

  1. suddenly and gradually
  2. gradually
  3. suddenly
  4. neither gradually nor suddenly
Correct answer: (A)
suddenly and gradually
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