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Questions on Queuing
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This lesson throws light on questions on queuing.

Harshit Aggarwal
Cleared UPSC ESE twice with Rank 63 and 90 in mechanical engg. Got 99 percentile in GATE. Cracked ONGC, BHEL,ISRO, SAIL, GAIL successfully

U
Unacademy user
Sir will you plz explain last question plz
how W1=W2 i am little bit confuse in that
MK
Sir, would you mind explaining the last question, why does the serving discipline not affect waiting time?
  1. COURSE: INDUSTRIAL ENGINEERING LESSON : QUESTIONS ON QUEU NG


  2. ABOUT ME Graduated from NIT Nagpur in 2008 Cleared Engineering Services Examination (ESE-UPSC) Exam Got the offer letter from most of the Maharatna and Navratna Companies Cleared GATE Exam Rate, Review, Recommend, Share Follow me on Unacademy at: https://unacademv.in/user/harshit aggarwal


  3. QUESTION A tain reservation facility has five counters each capable of handling 20 reservations/hr:Persons arrive at a mean rate of 90/hr. (i) Mean number of persons at any time in the facility (ii) The mean time a person spends at the facility (ii Average length of queue at each counter. What would happen to queue if the arrival rate reaches 105/hr.


  4. SOLUTION Loo S-.4 would 44.


  5. QUESTION A barber serves 5 customers/hr and customer arrival is 3 customers/hr.What is the probability that atleast 2 customer waiting in the queue P) = 1_ (.4+.24+,149 l-.784= .216 aloos Queue One in queuet One Sesved


  6. QUESTION Little's law is a relationship between: (a) Stock level and lead time in an inventory system (b) Waiting time and length of the queue in a queuing system (c) Number of machines and job due dates in a scheduling problem (d) Uncertainty in the activity time and project completion time Ans :b


  7. QUESTION Which of the following distributions is followed by the number of arrivals in a given time in a single-server queueing model? (a) Negative exponential distribution(b) Poisson distribution (c) Normal distribution (d) Beta distribution Ans :b


  8. QUESTION In single server queuing model if arrival rate is and service rate is u, then what is the probability of the system being idle? (b) H (c) 1-4 1-2 Ans:C


  9. QUESTION Consider two queuing disciplines in a single server queue. Case 1 has a first come first served discipline and case 2 has a last come first served discipline. If the average waiting times in the two cases are Wi and W2 respectively, then which one of the following inferences would be true? (a)W>W (d) Data insufficient to draw any tangible inference Ans:C


  10. THANK YOU