Operations Research

141. Which of the following is correct?

  1. Re-order quantity in a fixed order-interval system equals EOQ
  2. Review period of the item is always kept higher than its lead time
  3. Re-order level of an item is always more than its minimum stock
  4. Buffer stock is the total stock kept to meet the demand during lead time
Correct answer: (C)
Re-order level of an item is always more than its minimum stock

142. The group replacement policy is suitable for identical low cost items which are likely to ______________.

  1. fail suddenly
  2. fail completely and suddenly
  3. fail over a period of time
  4. be progressive and retrogressive
Correct answer: (C)
fail over a period of time

143. Identify the correct statement

  1. an assignment problem may require the introduction of both dummy row and dummy column
  2. an assignment problem with m rows and n columns will involves a total of m x n possible assignments
  3. an unbalanced assignment is one where the number of rows is more than, or less than the number of columns
  4. balancing any unbalanced assignment problem involves adding one dummy row or column
Correct answer: (C)
an unbalanced assignment is one where the number of rows is more than, or less than the number of columns

144. A game is said to be fair if ______________.

  1. lower and upper values are zero
  2. only lower value to be zero
  3. only upper value to be zero
  4. lower and upper values are not equal to zero
Correct answer: (A)
lower and upper values are zero

145. Which of the following is not a part of holding (or carrying) costs?

  1. Rent for storage space
  2. Extra expenses for an overnight express mail.
  3. Spoilage costs
  4. Electricity and heat for the buildings
Correct answer: (B)
Extra expenses for an overnight express mail.

146. The area bounded by all the given constraints is called ______________.

  1. feasible region
  2. basic solution
  3. non feasible region
  4. optimum basic feasible solution
Correct answer: (A)
feasible region

147. When D=18000, holding cost=Rs.1.20, set-up cost=Rs.400 ,EOQ = ______________

  1. 3465
  2. 3750
  3. 3500
  4. 4000
Correct answer: (A)
3465

148. Given arrival rate = 15/hr, service rate = 20/hr, the value of traffic intensity is ______________.

  1. 3/4
  2. 4/3
  3. 3/5
  4. 4/5
Correct answer: (A)
3/4

149. An activity is critical if its ______________ float is zero

  1. total
  2. free
  3. independent
  4. interference
Correct answer: (A)
total

150. ______________ is employed in construction and business problems

  1. Queue
  2. Replacement
  3. CPM
  4. PERT
Correct answer: (D)
PERT
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