Mechanical Engineering
GATE ME format:mcq PYQs
Build your understanding with focused practice from past exam papers.
Questions 111–120 of 599. Imported answers require independent review unless marked reviewed.
Question 28
Open questionMEMCQ1 markNeeds review
The phases present in pearlite are
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The “Earing” phenomenon in metal forming is associated with
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The grinding wheel used to provide the best surface finish is
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The allowance provided to a pattern for easy withdrawal from a sand mold is
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The most suitable electrode material used for joining low alloy steels using Gas Metal Arc Welding (GMAW) process is
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The preparatory functions in Computer Numerical Controlled (CNC) machine programing are denoted by the alphabet
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Open questionMEMCQ1 markNeeds review
A set of jobs
arrive at time
to a production line consisting of two workstations in series. Each job must be processed by both workstations in sequence (i.e., the first followed by the second). The process times (in minutes) for each job on each workstation in the production line are given below.Job | | | | | | |
|---|---|---|---|---|---|---|
Workstation 1 | 5 | 7 | 3 | 4 | 6 | 8 |
Workstation 2 | 4 | 6 | 6 | 8 | 5 | 7 |
The sequence in which the jobs must be processed by the production line if the total makespan of production is to be minimized is
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Open questionMEMCQ1 markNeeds review
A queueing system has one single server workstation that admits an infinitely long queue. The rate of arrival of jobs to the queue system follows the Poisson distribution with a mean of 5 jobs/hour. The service time of the server is exponentially distributed with a mean of 6 minutes. In steady state operation of the queue system, the probability that the server is not busy at any point in time is
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Open questionMEMCQ2 marksNeeds review
The matrix
(where
) has a negative eigenvalue if
is greater thanYour answerChoose one option.
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Open questionMEMCQ2 marksNeeds review
In the pipe network shown in the figure, all pipes have the same cross-section and can be assumed to have the same friction factor. The pipes connecting points
,
, and
with point
have an equal length
. The pipe connecting points
and
has a length
. The pressures at the ends
,
, and
are equal. The flow rate in the pipe connecting
and
is
. Assume that the fluid flow is steady, incompressible, and the pressure losses at the pipe entrance and junction are negligible. Consider the following statements:I: The flow rate in pipe connecting
and
is
.II: The pressure difference between
and
is equal to the pressure difference between
and
.Which one of the following options is CORRECT?
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