Queue length (Lq) is equal to

1.  

2.  

3.  

4.  

View Answer  
4
Correct Answer :


Explanation :
No Explanation available for this question

The excepted queue length will be

1.  0.3

2.  0.129

3.  1.29

4.  12.9

View Answer  
4
Correct Answer :

0.129


Explanation :
No Explanation available for this question

The excepted number of units in the system will be

1.  0.29

2.  0.43

3.  0.63

4.  None of these

View Answer  
4
Correct Answer :

0.43


Explanation :
No Explanation available for this question

The arrival is Poisson, with the mean rate of 5 units per hour. The service time is exponential with mean rate of 8 units per hour. The service is valued as Rs. 150 per hour. The average idle time cost per day of 8 hrs. Will be

1.  Rs.250

2.  Rs.350

3.  Rs.450

4.  Rs.500

View Answer  
4
Correct Answer :

Rs.450


Explanation :
No Explanation available for this question

In a single server queuing model, if the queue length is Lq, then number in the system is

1.  Lq + 1

2.  Lq + ρ

3.  Lq - ρ

4.  None of these

View Answer  
4
Correct Answer :

Lq + ρ


Explanation :
No Explanation available for this question

The ratio of mean arrival time to mean service time is founds as 1.2, It indicates that the queue would

1.  Become explosive

2.  Not become explosive

3.  Uncertain

4.   None of these

View Answer  
4
Correct Answer :

Not become explosive


Explanation :
No Explanation available for this question

In a single channel queue, if mean waiting time in the system is 50 mins, the mean waiting time in the queue is 30 min, then mean rate of service will be

1.  3/hour

2.  2/hour

3.  1/hour

4.  None of these

View Answer  
4
Correct Answer :

3/hour


Explanation :
No Explanation available for this question

The utilisation factor of a break down maintenance system with a single crew is 80 %. The excepted number of machines down at any time will be

1.  1

2.  2

3.  4

4.  8

View Answer  
4
Correct Answer :

4


Explanation :
No Explanation available for this question

As the ratio of mean arrival to mean service rate is increased, it is likely that

1.  Customer move through the system in less time, because utilization is increased

2.  Customers move through the system slowly

3.  Utilization is decreased because of the added strain on the system

4.  The average number in the system decreases

View Answer  
4
Correct Answer :

Customers move through the system slowly


Explanation :
No Explanation available for this question

A single server tool crib, with Poisson arrival and exponential service, has an utilisation factor of 75 %. Application of work study had doubled the mean service rate. The excepted time a worker spend in the system is

1.  Decreased by 20%

2.  Increased by 20 %

3.  Decreased by 80%

4.  Increased by 80%

View Answer  
4
Correct Answer :

Explanation :
No Explanation available for this question
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