GATE ME topic:mechanical-engineering PYQs & Answers — Page 17

Questions 161–170 of 1040. Imported answers require independent review unless marked reviewed.

The allowance provided to a pattern for easy withdrawal from a sand mold is

Your answerChoose one option.

finishing allowance

shrinkage allowance

distortion allowance

shake allowance

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The most suitable electrode material used for joining low alloy steels using Gas Metal Arc Welding (GMAW) process is

Your answerChoose one option.

copper

cadmium

low alloy steel

tungsten

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The preparatory functions in Computer Numerical Controlled (CNC) machine programing are denoted by the alphabet

Your answerChoose one option.

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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

Your answerChoose one option.

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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

Your answerChoose one option.

0.20

0.17

0.50

0.83

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The matrix

(where

) has a negative eigenvalue if

is greater than

Your answerChoose one option.

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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

. 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

II: The pressure difference between

and

is equal to the pressure difference between

and

Which one of the following options is CORRECT?

Diagram for Mechanical Engineering question 37

Your answerChoose one option.

I is True and II is False

I is False and II is True

Both I and II are True

Both I and II are False

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A company orders gears in conditions identical to those considered in the economic order quantity (EOQ) model in inventory control. The annual demand is 800 gears, the cost per order is 300 rupees, and the holding cost is 12 rupees per month per gear. The company uses an order size that is 25% more than the optimal order quantity determined by the EOQ model. The percentage change in the total cost of ordering and holding inventory from that associated with the optimal order quantity is

Your answerChoose one option.

2.5

12.5

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At the current basic feasible solution (bfs)

(

), the simplex method yields the following form of a linear programming problem in standard form.

Here the objective function is written as a function of the non-basic variables. If the simplex method moves to the adjacent bfs

(

) that best improves the objective function, which of the following represents the objective function at

, assuming that the objective function is written in the same manner as above?

Your answerChoose one option.

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Steady, compressible flow of air takes place through an adiabatic converging-diverging nozzle, as shown in the figure. For a particular value of pressure difference across the nozzle, a stationary normal shock wave forms in the diverging section of the nozzle. If

and

denote the flow conditions just upstream and downstream of the normal shock, respectively, which of the following statement(s) is/are TRUE?

Diagram for Mechanical Engineering question 40

Your answerSelect all correct options. You can choose more than one.

Static pressure at

is lower than the static pressure at $F

Density at

is lower than the density at $F

Mach number at

is lower than the Mach number at $F

Specific entropy at

is lower than the specific entropy at $F

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GATE ME topic:mechanical-engineering PYQs

Question 31

Question 32

Question 33

Question 34

Question 35

Question 36

Question 37

Question 38

Question 39

Question 40