Production and Industrial Engineering
GATE PI concept:reliability PYQs
Build your understanding with focused practice from past exam papers.
How to practice concept:reliability
Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.
Questions 1–8 of 8. Imported answers require independent review unless marked reviewed.
Question 17
Open questionPIMCQ1 markNeeds review
An aircraft has two engines, each having a reliability
. The aircraft will crash only when both engines stop working. The reliability of the aircraft flying without crash isYour answerChoose one option.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 52
Open questionPINAT2 marksNeeds review
A system shown in figure has seven components with reliabilities
,
,
,
,
,
,
. The reliability of the system is _____ (round off to 2 decimal places).
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 32
Open questionPINAT1 markNeeds review
In a machine there are two motors, but only one motor is needed for the functioning of the machine. The reliabilities of the motors are 0.90 and 0.70. The overall reliability of the machine is____________. [round off to two decimal places]
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 1
Open questionPIMCQ1 markNeeds review
A product has an exponential time-to-failure distribution with a constant failure rate of 0.0006 per hour. The reliability of the product after 400 hours of operation is
Your answerChoose one option.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 28
Open questionPIMCQ2 marksNeeds review
There are a number of identical components in a parallel system. When the system reliability is 0.97 and the reliability of each individual component is 0.68, the number of identical components in the system is (if actual value is a fraction, it may be rounded up to the next higher integer).
Your answerChoose one option.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 24
Open questionPINAT1 markNeeds review
Suppose the control system of a fighter jet consists of three unrelated components in series, and it is desired to have 98% reliability of the system. If the reliability level of all the components is the same, then the reliability of each component (rounded off to three decimal places) is __________.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 52
Open questionPINAT2 marksNeeds review
A monitoring system has seven components. The reliability of each component is shown in the figure. The system reliability is ______ (round off to 2 decimal places)
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 21
Open questionPINAT1 markNeeds review
A machine consists of three components P, Q and R connected in series. The reliabilities of P, Q and R are 0.97, 0.86 and 0.93, respectively. To increase the reliability of the machine, two additional stand-by units of Q are attached. The overall reliability (up to two decimal places) of the machine is ______
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer