GATE  >  GATE Mechanical (ME) 2023 Mock Test Series  >  Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) Download as PDF

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test)


Test Description

65 Questions MCQ Test GATE Mechanical (ME) 2023 Mock Test Series | Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test)

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) for GATE 2022 is part of GATE Mechanical (ME) 2023 Mock Test Series preparation. The Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) questions and answers have been prepared according to the GATE exam syllabus.The Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) MCQs are made for GATE 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) below.
Solutions of Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) questions in English are available as part of our GATE Mechanical (ME) 2023 Mock Test Series for GATE & Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) solutions in Hindi for GATE Mechanical (ME) 2023 Mock Test Series course. Download more important topics, notes, lectures and mock test series for GATE Exam by signing up for free. Attempt Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) | 65 questions in 180 minutes | Mock test for GATE preparation | Free important questions MCQ to study GATE Mechanical (ME) 2023 Mock Test Series for GATE Exam | Download free PDF with solutions
1 Crore+ students have signed up on EduRev. Have you?
Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 1

Direction

Q. No. 1 - 5 Carry One Mark Each

Q. A right –angled cone (with base radius 5 cm and height 12 cm), as shown in the figure below, is rolled on the ground keeping the point P fixed until the point Q (at the base of the cone, as shown touches the ground again

By what angle (in radians) about P does the cone travel?

Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 1

According to the given information about the figure, the new shape is as follows

 

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 2

In a company with 100 employees, 45 earn Rs.20, 000 per month, 25 earn Rs.30, 000, 20 and earn Rs.40, 000, 8 earn rs.60, 000, and 2 earn Rs.150, 000. The median of the salaries is

Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 2

Put all the values either in ascending or descending order first. Now number of observations equal to 100 which is even
The median of these values = Avg of two middle most observations. i.e 50th and 51st observation

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 3

As the two speakers became increasingly agitated, the debate became __________.

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 4

P, Q, and R talk about S’s car collection. P states that S has at least 3 cars. Q believes that S has less than 3 cars. R indicates that to his knowledge, S has at least one car. Only one of P, Q and R is right. The number of cars owned by S is

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 5

He was one of my best __________ and I felt his loss _________.

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 6

Directions

Q. No. 6- 10 Carry Two Marks Each

Q.

Two very famous sportsmen Mark and Steve happened to be brothers, and played for country K. Mark teased James, an opponent from country E, “There is no way you are good enough to play for your country.‟‟ James replied, “Maybe not, but at least I am the best player in my own family.” Which one of the following can be inferred from this conversation?

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 7

“Here, throughout the early 1820s, Stuart continued to fight his losing battle to allow his sepoys to wear their caste-marks and their own choice of facial hair on parade, being again reprimanded by the commander-in-chief. His retort that „A stronger instance than this of European prejudice with relation to this country has never come under my observations‟ had no effect on his superiors.” According to this paragraph, which of the statements below is most accurate?

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 8

The growth of bacteria (lactobacillus) in milk leads to curd formation. A minimum bacterial population density of 0.8(in suitable units) is needed to form curd. In the graph below, the population density of lactobacillus in 1 litre of milk is plotted as a function of time, at two different temperatures, 25°C and 37°C. Consider the following statements based on the data shown above

(i) The growth in bacterial population stops earlier at 37°C as compared to 25°C

(ii) The time taken for curd formation at 25°C is twice the time taken at 37°C 

 Which one of the following options is correct?

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 9

Let S1 be the plane figure consisting of the points (x,y) given by the inequalities |x - 1|≤2 and |y+2|≤ 3. Let S2 be the plane figure given by the inequalities x - y ≥ -2, y ≥1, and  x ≤3 Let S be the union of S1 and S2. The area of S is.

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 10

What is the sum of the missing digits in the subtraction problem below?

*Answer can only contain numeric values
Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 11

Directions

Q. No. 1 to 25 Carry One Mark Each

Q. A motor driving a solid circular steel shaft transmits 40kW of power at 500 rpm. If the diameter of the shaft is 40 mm, the maximum shear stress in the shaft is ________MPa.

 


Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 11

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 12

Consider the following partial differential equation for u(x,y) with the constant c > 1 :  Solution of this equation is 

Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 12

     u(x,y) = f(x-cy)

*Answer can only contain numeric values
Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 13

The following figure shows the velocity-time plot for a particle traveling along a straight line. The distance covered by the particle from t = 0 at t = 5s is______m.

 


Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 13

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 14

The damping ratio for a viscously damped spring mass system, governed by the relation

 

 is given by

 

Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 14

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 15

The differential equation   with the two boundary conditions 

Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 15

*Answer can only contain numeric values
Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 16

Metricthread of 0.8 mm pitch is to be cut on a lathe. Pitch of the lead screw is 1.5 mm. If the spindle rotates at 1500 rpm, the speed of rotation of the lead screw (rpm) will be _________


*Answer can only contain numeric values
Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 17

The molar specific heat at constant volume of an ideal gas is equal to 2.5 times the universal gas constant (8.314 J/mol.K). When the temperature increases by 100K, the change in molar specific enthalpy is _______________ J/mol.


Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 17

Cv= 2.5Rv  where (Rv= 8.314J/moLK)

ΔT=100K

ΔH=?

ΔH=CpΔT

∴ C-Cv = Rv

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 18

A particle of unit mass is moving on a plane. Its trajectory, in polar coordinates, is given by r(t) = t2, θ( t )= t, where t is time. The kinetic energy of the particle at time t = 2 is

Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 18

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 19

The Poisson"s ratio for a perfectly incompressible linear elastic material is 

*Answer can only contain numeric values
Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 20

A heat pump absorbs 10 kW of heat from outside environment at 250 K while absorbing 15 kW of work. It delivers the heat to a room that must be kept warm at 300K. The Coefficient of Performance (COP) of the heat pump is ___________.


Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 20

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 21

Which one of the following is NOT a rotating machine?

Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 21

In the given options all the pumps have rotating machine elements except Jet pump.

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 22

Consider the schematic of a riveted lap subjected to tensile load F, as shown below. Let d be the diameter of the rivets, and joint Sf be the maximum permissible tensile stress in the plates. What should be the minimum fvalue or the thickness of the plates to guard against tensile failure of the plates? Assume the plates to be identical.

 

Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 22

*Answer can only contain numeric values
Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 23

Water (density = 1000 kg/m3) at ambient temperature flows through a horizontal pipe of uniform cross section at the rate of 1 kg/s. If the pressure drop across the pipe is 100 kPa, the minimum power required to pump the water across the pipe, in watts, is_____


Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 23

Power = w Q hL (Power is required to overcome losses, hL)

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 24

For steady flow of a viscous incompressible fluid through a circular pipe of constant diameter, the average velocity in the fully developed region is constant. Which one of the following statements about the average velocity in the developing region is TRUE?

Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 24

The average velocity in pipe flow always be same either for developing flow or fully developed flow.

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 25

Cylindrical pins of diameter 15+0.020 mm are being produced on a machine. Statistical quality control tests show a mean of 14.995 mm and standard deviation of 0.004mm. The process capability index Cp is

Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 25

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 26

The product of eigenvalues of the matrix P is

Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 26

From the property of eigenvalues Product of eigenvalues = |P|

= 2

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 27

 

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 28

The value of 

Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 28

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 29

In an arc welding process, welding speed is doubled. Assuming all other process parameters to be constant, the cross sectional area of the weld bead will

Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 29

By doubling welding speed, Area reduces by 50%

*Answer can only contain numeric values
Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 30

A six-face fair dice is rolled a large number of times. The mean value of the outcomes is ______.


Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 30

The Probabilities corresponding to the outcomes are given below:

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 31

Consider the two dimensional velocity field given by

where a1,b1,a2 & b2 are constants. Which one of the following conditions needs to be satisfied for the flow to be incompressible?

Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 31

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 32

Consider a beam with circular cross-section of diameter d. The ratio of the second moment of area about the neutral axis to the section modulus of the area is

Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 32

*Answer can only contain numeric values
Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 33

Saturated steam at 100°C condenses on the outside of a tube. Cold fluid enters the tube at 20° C and exists at 50°C. The value of the Log Mean Temperature Difference (LMTD) is ________°C.


Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 33

*Answer can only contain numeric values
Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 34

In a metal forming operation when the material has just started yielding, the principal stresses are σ1 = +180 MPa, σ2 = -100 MPa, σ3 = 0. Following Von Mises criterion, the yield stress is ________ MPa.


Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 34

As per Von-Mises criteria

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 35

In the engineering stress-strain curve for mild steel, the Ultimate Tensile Strength (UTS) refers to 

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 36

Directions

Q. No. 36 to 65 Carry Two Marks Each

Q.

A parametric curve defined by x = cos (πu/2), y= sin (πu/2)
in the range 0≤ u ≤1 is rotated 
about the X – axis by 360 degrees. Area of the surface generated is.

 

Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 36

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 37

Assume that the surface roughness profile is triangular as shown schematically in the figure. If the peak to valley height is 20 mm, The central line average surface roughness Ra (in µm ) is ​

Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 37

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 38

A thin uniform rigid bar of length L and mass M is hinged at point O, located at a distance of L/
3 from one of its ends. The bar is further supported using springs, each of stiffness k, located  at the two ends. A particle of mass m=M/4 is fixed at one end of the bar, as shown in the figure. For small rotations of the bar about O, the natural frequency of the systems is. 

Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 38

Max moment of inertia of Rod.

 

*Answer can only contain numeric values
Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 39

A point mass of 100 kg is dropped onto a massless elastic bar (cross-sectional area = 100 mm2, length = 1m, Young‟s moduls = 100 GPa) from a height H of 10mm as shown (Figure is not to scale). If g = 10m/s2, the maximum compression of the elastic bar is _______ mm.

 


Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 39

Given that
m = 100kg, g =10 m /sec2 , E= 100GPa H=10mm, L =1m= 100mm, A =100mm2
From the given figure, we can say that this is case of Impact loading, We know that, stress due to Impact load is

*Answer can only contain numeric values
Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 40

One kg of an ideal gas (gas constant, R = 400 J/kg.K; specific heat at constant volume, cn = 1000J/kg.K) at 1 bar, and 300 K is contained in a sealed rigid cylinder. During an adiabatic process, 100kJ of work is done on the system by a stirrer. The increase in entropy of the system is _________ J/K.


Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 40

 

Given that m = 1kg, R = 400 kJ/kgK, CV = 1000 J/kgK 11
P1 = 1 bar, T1= 300 K Since the gas is contained in a sealed rigid cylinder, and given that adiabatic process is done to the system, means no heat is transferred from/to the system, Q = 0 And we know from first law of thermo dynamics,

*Answer can only contain numeric values
Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 41

For an inline slider-crank mechanism, the length of the crank and connecting rod are 3 m and 4 m, respectively. At the instant when the connecting rod is perpendicular to the crank, if the velocity of the slider is 1 m/s, the magnitude of angular velocity (upto 3 decimal points accuracy) of the crank is _________radian/s.


*Answer can only contain numeric values
Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 42

In an epicyclic gear train, shown in the figure, the outer ring gear is fixed, while the sun gear rotates counterclockwise at 100rpm. Let the number of teeth on the sun, planet and outer gears to be 50, 25, and 100, respectively. The ratio of magnitudes of angular velocity of the planet gear to the angular velocity of the carrier arm is _________.


Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 42

Ts= 50 , Tp= 25, TR=100 

 

*Answer can only contain numeric values
Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 43

Moist air is treated as an ideal gas mixture of water vapor and dry air (molecular weight of air = 28.84 and molecular weight of water = 18). At a location, the total pressure is 100 kPa, the temperature is 30°C and the relative humidity is 55%. Given that the saturation pressure of water at 30°C is 4246 Pa, the mass of water vapor per kg of dry air is _____________ grams.

 


Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 43

*Answer can only contain numeric values
Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 44

Following data refers to the jobs (P, Q, R, S) which have arrived at a machine for scheduling. The shortest possible average flow time is ______ days.


Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 44

 

 

*Answer can only contain numeric values
Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 45

Two models, P and Q, of a product earn profits of Rs. 100 and Rs. 80 per piece, respectively. Production times for P and Q are 5 hours and 3 hours, respectively, while the total production time available is 150 hours. For a total batch size of 40, to maximize profit, the number of units of P to be produced is ____________.


Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 45

Let x1 = No. of units of P

       x2= No. of units of Q

So, for maximum profit, No. of units of P produced is 15 units.

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 46

Circular arc on a part profile is being machined on a vertical CNC milling machine. CNC part program using metric units with absolute dimensions is listed below: -----------------------------

N60  G01  X 30  Y  55  Z – 5 F 50

N70  G02  X 50  Y  35  R 20

N80  G01  Z 5

--------------------------------

The coordinates of the centre of the circular arc are :

Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 46

Centre of circular arc is (30, 35)

*Answer can only contain numeric values
Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 47

Two black surfaces, AB and BC, of lengths 5m and 6m, respectively, are oriented as shown. Both surfaces extend infinitely into the third dimension. Given that view factor F12=0.5, T1=800K, T2=600K, Tsurrounding=300K and Stefan Boltzmann constant, σ = 5.67 x 10-8 W / ( m2K4 ) , the heat transfer rate from Surface 2 to the surrounding environment is ____________ kW.


Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 47

Given that two black surfaces 'AB' and 'BC' Length of AB = 5m, BC = 6 m And temperature of Surface '1' ( TBC = T1) = 800K

Temperature of surface '2' (TAB = T= 600o K )

Temperature of surroundings ( T3 ) = 300

Using resistance concept we can draw as follows                                 Since surfaces are black and area of surrounding is large we can write

 

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 48

  Consider the matrix.

 Which one of the following statements about P is INCORRECT?

Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 48

∴ P is an orthogonal matrxi

∴ (A) Is correct ⇒ Inverse of P is its transpose only

∴ (B) and (C) both are correct

∴ (D) is incorrect

*Answer can only contain numeric values
Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 49

The Pressure ratio across a gas turbine (for air, specific heat at constant pressure, cp = 1040J / kg. K and ratio of specific heats, γ = 1.4) is 10. If the inlet temperature to the turbine is 1200K and the isentropic efficiency is 0.9, the gas temperature at turbine exit is ______ K.


Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 49

Cp = 1040J/KgK ,r = 1.4

P2/P1 = 10, T= 1200K

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 50

An initially stress-free massless elastic beam of length L and circular cross-section with diameter d (d << L) is held fixed between two walls as shown. The beam material has Young's modulus E and coefficient of thermal expansion α.

If the beam is slowly and uniformly heated, the temperature rise required to cause the beam to buckle is proportional to

Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 50

 

*Answer can only contain numeric values
Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 51

For the vector 

  

is ———

 


Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 51

for any vector V

*Answer can only contain numeric values
Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 52

A 10 mm deep cylindrical cup with diameter of 15mm is drawn from a circular blank. Neglecting the variation in the sheet thickness, the diameter (upto 2 decimal points accuracy) of the blank is _________ mm.


Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 52

*Answer can only contain numeric values
Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 53

A machine element has an ultimate strength (σu) of 600 N/mm2, and endurance limit ( σen ) of 250 N/mm2. The fatigue curve for the element on log-log plot is shown below. If the element is to be designed for a finite of 10000 cycles, the maximum amplitude of a completely reversed operating stress is _________ N/mm2.

 


Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 53

σu = 600MPa

σen = 250MPa

N = 10000 cycles

σmax = 386.19MPa

 

*Answer can only contain numeric values
Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 54

A sprue in a sand mould has a top diameter of 20mm and height of 200mm. The velocity of the molten metal at the entry of the sprue is 0.5m/s. Assume acceleration due to gravity as 9.8 m/s2 and neglect all losses. If the mould is well ventilated, the velocity (upto 3 decimal points accuracy) of the molten metal at the bottom of the sprue is ________ m/s.


Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 54

Apply Bernoulli's between (1) and (2)

*Answer can only contain numeric values
Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 55

Air contains 79% Nand 21% O2 on a molar basis. Methane (CH4) is burned with 50% excess air than required stoichiometrically. Assuming complete combustion of methane, the molar percentage of N2 in the products is ________________

 


Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 55

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 56

P(0,3), Q(0.5, 4), and R (1,5) are three points on the curve defined by f(x). Numerical integration is carried out using both Trapezoidal rule and Simpson's rule within limits x = 0 and x =1 for the curve. The difference between the two results will be.

Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 56

*Answer can only contain numeric values
Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 57

Heat is generated uniformly in a long solid cylindrical rod (diameter = 10mm) at the rate of 4×107 W/m3. The thermal conductivity of the rod material is 25W/m.K. Under steady state conditions, the temperature difference between the centre and the surface of the rod is _________ °C.


Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 57

Given that, heat is generated uniformly i.e.,

g = 4x107 W/m3Diameter at the rod (d) = 10 mm

Thermal conductivity of the rod (K) = 25 W/mK

W.K.T for steady state, with internal heat generation, the conduction equation will be,

The above equation will become

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 58

Two disks A and B with identical mass (m) and radius (R) are initially at rest. They roll down from the top of identical inclined planes without slipping. Disk A has all of its mass concentrated at the rim, while Disk B has its mass uniformly distributed. At the bottom of the plane, the ratio of velocity of the center of disk A to the velocity of the center of disk B is.

Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 58

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 59

A block of length 200mm is machined by a slab milling cutter 34mm in diameter. The depth of cut and table feed are set at 2mm and 18mm/minute, respectively. Considering the approach and the over travel of the cutter to be same, the minimum estimated machining time per pass is _____________ minutes.

*Answer can only contain numeric values
Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 60

A horizontal bar, fixed at one end (x = 0), has a length of 1 m, and cross-sectional area of 100mm2. Its elastic modulus varies along its length as given by E(x) = 100e-x GPa, Where x is the length coordinate (in m) along the axis of the bar. An axial tensile load of 10 kN is applied at the free end (x=1). The axial displacement of the free end is _______ mm.


Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 60

Given that 

P=10kN =10x103N , A = 100mm2

     

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 61

Consider steady flow of an incompressible fluid through two long and straight pipes of diameters d1 and d2 arranged in series. Both pipes are of equal length and the flow is turbulent in both pipes. The friction factor for turbulent flow though pipes is of the form, f = K(Re)-n where K and n are known positive constants and Re is the Reynolds number. Neglecting minor losses, the ratio of the frictional pressure drop in pipe 1 to that in pipe 2,

  is given by 

 

Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 61

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 62

The velocity profile inside the boundary layer for flow over a flat plate is given as 

where U is the free stream velocity and d is the local boundary layer thickness. If δ* is the local displacement thickness, the value of

 

Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 62

Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 63

For a steady flow, the velocity field is

The magnitude of the 
acceleration of a particle at (1, -1) is

Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 63

*Answer can only contain numeric values
Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 64

Two cutting tools with tool life equations given below are being compared:

Tool 1: VT0.1=150

Tool 2: VT0.3= 300

Where V is cutting speed in m/minute and T is tool life in minutes. The breakeven cutting speed beyond which Tool 2 will have a higher tool life is ________ m/minute.


Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 64

At Breakeven point

T1=T2 

*Answer can only contain numeric values
Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 65

A rectangular region in a solid is in a state of plane strain. The (x,y) coordinates of the corners of the under deformed rectangle are given by P(0,0), Q (4,0), S (0,3). The rectangle is subjected to uniform strains,εxx =0.001 , εyy =0.002, γxy =0.003. The deformed length of the elongated diagonal, up to three decimal places, is _________ units. 


Detailed Solution for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) - Question 65

Given that

εxy = 0.001, εxy = 0.002, γxy = 0.003

Length of the diagonal ( PR ) =

To find the diagonal (PR) strain, the direction of the plane angle from the +ve x-axis will from 'R' towards 'P'

εθ = ?

 

Use Code STAYHOME200 and get INR 200 additional OFF
Use Coupon Code
Information about Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) Page
In this test you can find the Exam questions for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test) solved & explained in the simplest way possible. Besides giving Questions and answers for Mechanical Engineering (Set 1) - ME 2017 GATE Paper (Practice Test), EduRev gives you an ample number of Online tests for practice