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Recent questions tagged gate20141
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GATE2014152
During pure orthogonal turning operation of a hollow cylindrical pipe, it is found that the thickness of the chip produced is $0.5$ $mm$. The feed given to the zero degree rake angle tool is $0.2$ $mm/rev$. The shear strain produced during the operation is _______
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Feb 19, 2017
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gate20141
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GATE2014151
A metal rod of initial length $L_0$ is subjected to a drawing process. The length of the rod at any instant is given by the expression, $L(t)=L_0(1+t^2)$ , where $t$ is the time in minutes. The true strain rate (in $min^{−1}$) at the end of one minute is _______
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GATE2014150
Jobs arrive at a facility at an average rate of $5$ in an $8$ hour shift. The arrival of the jobs follows Poisson distribution. The average service time of a job on the facility is $40$ minutes. The service time follows exponential distribution. Idle time (in hours) at the facility per shift will be $\frac{5}{7}$ $\frac{14}{3}$ $\frac{7}{5}$ $\frac{10}{3}$
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GATE2014149
An ideal reheat Rankine cycle operates between the pressure limits of $10$ $kPa$ and $8$ $MPa$, with reheat being done at $4$ $MPa$. The temperature of steam at the inlets of both turbines is $500^0C$ and the enthalpy of steam is $3185$ ... pump is $191$ $kJ/kg$. Use the following table for relevant data. Disregarding the pump work, the cycle efficiency (in percentage) is _______
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gate20141
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GATE2014155
An aluminium alloy (density $2600$ $kg$/$m^3$) casting is to be produced. A cylindrical hole of $100$ $mm$ diameter and $100$ $mm$ length is made in the casting using sand core (density $1600$ $kg$/$m^3$). The net buoyancy force (in newton) acting on the core is _______
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gate20141
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GATE2014154
If the Taylor’s tool life exponent $n$ is $0.2$, and the tool changing time is $1.5$ $min$, then the tool life (in $min$) for maximum production rate is _______
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GATE2014153
For the given assembly: $25$ $H7/g8$, match Group $A$ with Group $B$ PI, QIII, RIV, SII PI, QIV, RIII, SII PII, QIII, RIV, SI PII, QIV, RIII, SI
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GATE2014148
A reversible heat engine receives $2$ $kJ$ of heat from a reservoir at $1000$ $K$ and a certain amount of heat from a reservoir at $800$ $K$. It rejects $1$ $kJ$ of heat to a reservoir at $400$ $K$. The net work output (in $kJ$) of the cycle is $0.8$ $1.0$ $1.4$ $2.0$
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gate20141
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GATE2014147
In an airstandard Otto cycle, air is supplied at $0.1$ $MPa$ and $308$ $K$. The ratio of the specific heats $(γ)$ and the specific gas constant $(R)$ of air are $1.4$ and $288.8$ $J/kg.K$, respectively. If the compression ratio is $8$ and the maximum temperature in the cycle is $2660$ $K$, the heat (in $kJ/kg$) supplied to the engine is _______
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gate20141
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GATE2014146
The nondimensional fluid temperature profile near the surface of a convectively cooled flat plate is given by $\frac{T_WT}{T_WT_\infty }=a+b\frac{y}{L}+c(\frac{y}{L})^2$ , where $y$ is measured perpendicular to the plate, $L$ is the plate length, and $a$, $b$ and $c$ are ... $Nu=\frac{{q}''}{T_WT_\infty }\frac{L}{k}$ is equal to $a$ $b$ $2c$ $(b+2c)$
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Feb 19, 2017
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GATE2014145
In a simple concentric shaftbearing arrangement, the lubricant flows in the $2$ $mm$ gap between the shaft and the bearing. The flow may be assumed to be a plane Couette flow with zero pressure gradient. The diameter of the shaft is $100$ $mm$ and its tangential speed ... is $0.1$ $kg/m.s$. The frictional resisting force (in newton) per $100$ $mm$ length of the bearing is _______
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Feb 19, 2017
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gate20141
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GATE2014144
For a fully developed flow of water in a pipe having diameter $10$ $cm$, velocity $0.1$ $m/s$ and kinematic viscosity $10^{−5}$ $m^2$/$s$, the value of Darcy friction factor is _______
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Feb 19, 2017
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gate20141
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GATE2014143
Water flows through a pipe having an inner radius of $10$ $mm$ at the rate of $36$ $kg/hr$ at $25^0C$. The viscosity of water at $25^0C$ is $0.001$ $kg/m.s$. The Reynolds number of the flow is _______
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Feb 19, 2017
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21.5k
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gate20141
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GATE2014142
Consider one dimensional steady state heat conduction across a wall (as shown in figure below) of thickness $30$ $mm$ and thermal conductivity $15$ $W/m.K$. At $x$ = $0$, a constant heat flux, ${q}''$ = $1 105$ $W$/$m^2$ is applied. On the other side of the wall, ... fluid at $25^0C$ and heat transfer coefficient of $250$ $W$/$m^2.K$. The temperature (in $°C$), at $x$ = $0$ is _______
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Feb 19, 2017
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gate20141
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GATE2014141
$1.5$ kg of water is in saturated liquid state at $2$ bar (vf = $0.001061$ $m^3$/kg, uf = $504.0$ $kJ/kg$, hf = $505 kJ/kg$). Heat is added in a constant pressure process till the temperature of water reaches $400^0C$ (v = $1.5493$ $m^3$/$kg$, u = $2967.0$ $kJ/kg$, h = $3277.0$ $kJ/kg$). The heat added (in $kJ$) in the process is _______
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Feb 19, 2017
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21.5k
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gate20141
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GATE2014140
A $200$ mm long, stress free rod at room temperature is held between two immovable rigid walls. The temperature of the rod is uniformly raised by $250^0C$. If the Young’s modulus and coefficient of thermal expansion are $200$ GPa and $1×10^{−5}$ /$_{}^{0}\textrm{C}$ , respectively, the magnitude of the longitudinal stress (in MPa) developed in the rod is _______
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gate20141
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GATE2014139
A hydrodynamic journal bearing is subject to $2000$ N load at a rotational speed of $2000$ rpm. Both bearing bore diameter and length are $40$ mm. If radial clearance is µm and bearing is lubricated with an oil having viscosity $0.03$ $P_{a.s}$, the Sommerfeld number of the bearing is ______
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Feb 19, 2017
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gate20141
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GATE2014138
A rigid uniform rod AB of length L and mass m is hinged at C such that AC = L/$3$, CB = $2$L/$3$. Ends A and B are supported by springs of spring constant k. The natural frequency of the system is given by $\sqrt{\frac{k}{2m}}$ $\sqrt{\frac{k}{m}}$ $\sqrt{\frac{2k}{m}}$ $\sqrt{\frac{5k}{m}}$
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gate20141
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GATE2014137
An offset slidercrank mechanism is shown in the figure at an instant. Conventionally, the Quick Return Ratio (QRR) is considered to be greater than one. The value of QRR is _______
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Feb 19, 2017
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gate20141
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GATE2014136
A slider crank mechanism has slider mass of $10$ kg, stroke of $0.2$ m and rotates with a uniform angular velocity of $10$ rad/s. The primary inertia forces of the slider are partially balanced by a revolving mass of $6$ kg at the crank, placed at a ... When the crank angle (with respect to slider axis) is $30^0$, the unbalanced force (in newton) normal to the slider axis is _____
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Feb 19, 2017
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gate20141
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GATE2014135
A block weighing $200$ $N$ is in contact with a level plane whose coefficients of static and kinetic friction are $0.4$ and $0.2$, respectively. The block is acted upon by a horizontal force (in newton) P=$10$t, where t denotes the time in seconds. The velocity (in $m/s$) of the block attained after $10$ seconds is _______
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Feb 19, 2017
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21.5k
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gate20141
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GATE2014134
An ideal water jet with volume flow rate of $0.05$ $m^3$/$s$ strikes a flat plate placed normal to its path and exerts a force of $1000$ $N$. Considering the density of water as $1000kg$/$m^3$,the diameter(in $mm$) of the water jet is _______
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Feb 19, 2017
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21.5k
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gate20141
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GATE2014133
Consider a cantilever beam, having negligible mass and uniform flexural rigidity, with length $0.01$ $m$. The frequency of vibration of the beam, with a $0.5$ $kg$ mass attached at the free tip, is $100$ $Hz$. The flexural rigidity (in $N$.$m^2$) of the beam is _______
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gate20141
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GATE2014132
A pair of spur gears with module $5$ $mm$ and a center distance of $450$ $mm$ is used for a speed reduction of $5:1$. The number of teeth on pinion is _______
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gate20141
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GATE2014131
A block R of mass $100$ kg is placed on a block S of mass $150$ kg as shown in the figure. Block R is tied to the wall by a massless and inextensible string PQ .If the coefficient of static friction for all surfaces is $0.4$, the minimum force F (in $kN$) needed to move the block S is . $0.69$ $0.88$ $0.98$ $1.37$
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Feb 19, 2017
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21.5k
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gate20141
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GATE2014130
The state of stress at a point is given by $\sigma _x=6 MPa$ ,$\sigma _y=4 MPa$ and $\tau _{xy}=8 MPa$.The maximum tensile stress in (MPa) at the point is _____
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gate20141
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GATE2014129
Using the trapezoidal rule, and dividing the interval of integration into three equal subintervals, the definite integral $\int_{1}^{+1}xdx$ is _____
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Feb 19, 2017
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gate20141
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GATE2014128
In the following table, x is a discrete random variable and p(x) is the probability density. The standard deviation of x is $0.18$ $0.36$ $0.54$ $0.60$
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Feb 19, 2017
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gate20141
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GATE2014127
If y = f(x) is the solution of $\frac{d^2y}{dx^2}=0$ with the boundary conditions y = $5$ at x = $0$ and $\frac{dy}{dx}$=$2$ at x = $10$, f($15$) =_____ .
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Feb 19, 2017
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Arjun
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21.5k
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gate20141
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GATE2014122
The major difficulty during welding of aluminum is due to its high tendency of oxidation high thermal conductivity low melting point low density
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Feb 19, 2017
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Casting, Forming and Joining Processes
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Arjun
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21.5k
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gate20141
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GATE2014126
The integral $\oint_{c}^{ } (ydxxdy)$ is evaluated along the circle $x^2+y^2=\frac{1}{4}$ traversed in counter clockwise direction. The integral is equal to $0$ $\frac{\pi }{4}$ $\frac{\pi }{2}$ $\frac{\pi }{4}$
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Feb 19, 2017
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gate20141
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GATE2014125
In solidstate welding, the contamination layers between the surfaces to be welded are removed by alcohol plastic deformation water jet sand blasting
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GATE2014124
The process of reheating the martensitic steel to reduce its brittleness without any significant loss in its hardness is normalising annealing quenching tempering
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GATE2014123
The main cutting force acting on a tool during the turning (orthogonal cutting) operation of a metal is $400$ $N$. The turning was performed using $2$ $mm$ depth of cut and $0.1$ $mm/rev$ feed rate. The specific cutting pressure (in $N$/$mm^2$) is $1000$ $2000$ $3000$ $4000$
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GATE2014121
Which one of the following instruments is widely used to check and calibrate geometric features of machine tools during their assembly? Ultrasonic probe Coordinate Measuring Machine (CMM) Laser interferometer Vernier calipers
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GATE2014120
For machining a rectangular island represented by coordinates $P(0,0), Q(100,0), R(100,50)$ and $S(0,50)$ on a casting using CNC milling machine, an end mill with a diameter of $16$ $mm$ ... $(−8,8), (94,0), (94,44), (8,44), (−8,8)$ $(0,0), (100,0), (100,50), (50,0), (0,0)$
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GATE2014119
In exponential smoothening method, which one of the following is true? $0$≤ $α$ ≤ $1$ and high value of $α$ is used for stable demand $0$ ≤ $α$ ≤ $1$ and high value of $α$ is used for unstable demand $α$ ≥ $1$ and high value of $α$ is used for stable demand $α$ ≤ $0$ and high value of $α$ is used for unstable demand
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GATE2014118
The jobs arrive at a facility, for service, in a random manner. The probability distribution of number of arrivals of jobs in a fixed time interval is Normal Poisson Erlang Beta
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GATE2014117
Which one of the following is a CFC refrigerant? $R744$ $R290$ $R502$ $R718$
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GATE2014116
In a power plant, water (density = $1000$ $kg$/$m^3$) is pumped from $80$ $kPa$ to $3$ $MPa$. The pump has an isentropic efficiency of $0.85$. Assuming that the temperature of the water remains the same, the specific work (in $kJ$/$kg$) supplied to the pump is $0.34$ $2.48$ $2.92$ $3.43$
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