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Recent questions and answers in Applied Mechanics and Design
0
votes
2
answers
GATE2018225
A ball is dropped from rest from a height of $1 \: m$ in a frictionless tube as shown in the figure. If the tube profile is approximated by two straight lines (ignoring the curved portion), the total distance travelled (in $m$) by the ball is _____ (correct to two decimal places)
answered
Mar 13, 2018
in
Engineering Mechanics
by
SHUBHAM SILSWAL
(
140
points)
gate20182
0
votes
1
answer
GATE2018220
A hollow circular shaft of inner radius $10 \: mm$ outer radius $20 \: mm$ length $1 \: m$ is to be used as a torsional spring. If the shear modulus of the material of the shaft is $150 \: GPa$, the torsional stiffness of the shaft (in $kNm/rad$) is ____ (corret to two decimal places).
answered
Mar 6, 2018
in
Mechanics of Materials
by
m2n037
(
1.4k
points)
gate20182
0
votes
1
answer
GATE2018221
Fatigue life of a material for a fully reversed loading condition is estimated from $$\sigma_a=1100N^{0.15}$, where $\sigma_a$ is teh stress amplitude in $MPa$ and $N$ is the failure life in cycles. The maximum allowable stress amplitude (in $MPa$) for a life of $1 \times 10^5$ cycles under the same loading condition is ________ (correct to two decimal places).
answered
Mar 6, 2018
in
Mechanics of Materials
by
m2n037
(
1.4k
points)
gate20182
0
votes
0
answers
ISRO201711
asked
Mar 5, 2018
in
Engineering Mechanics
by
m2n037
(
1.4k
points)
isro20171
0
votes
0
answers
GATE2018246
The true stress (in MPa) versus true strain relationship for a metal is given by $\sigma=1020 \varepsilon^{0.4}$. The cross sectionalarea at the start of the test (when the stress and strain values are equal to zero) is $100 \: mm^2$. The crosssectional area at the time of necking ( in $mm^2$) is _____ correct to two decimal palces.
asked
Feb 17, 2018
in
Mechanics of Materials
by
Arjun
(
21.5k
points)
gate20182
0
votes
0
answers
GATE2018239
A force of $100 \: N$ applied to the centre of a circular disc, of mass $10 \: kg$ and radius $1 \: m$, resting on a floor as shown in the figure. If teh disc rolls without slipping on the floor, the linear acceleration (in $m/s^2$) of teh centre of teh disc is _______ (correct to two decimal places).
asked
Feb 17, 2018
in
Engineering Mechanics
by
Arjun
(
21.5k
points)
gate20182
0
votes
0
answers
GATE2018237
A thinwalled cylindrical can with rigid end caps has a mean radius $R=100\:mm$ and a wall thickness of $t=5 \: mm$. The can is pressurized and an additional tensile stress of a $50 \: MPa$ is imposed along the axial direction as shown in ... circumferential components of stress in the can are equal, the pressure (in $MPa$) inside the can is _______ (correct to two decimal places)
asked
Feb 17, 2018
in
Mechanics of Materials
by
Arjun
(
21.5k
points)
gate20182
0
votes
0
answers
GATE2018233
A bimetallic cylindrical bar cross sectional area $1 \: m^2$ is made by bonding Steel (Young's modulus = $210 \: GPa$) and Aluminium (Young's modulus =$70 \: GPa$) as shown in the figure. To maintain tensile axial strain of magnitude $10^{6}$ in Steel bar ... $10^{6}$ in Aluminium bar, the magnitude of the required force $P$ (in $kN$) along the indicated direction is 70 140 210 280
asked
Feb 17, 2018
in
Mechanics of Materials
by
Arjun
(
21.5k
points)
gate20182
0
votes
0
answers
GATE2018238
A bar is subjected to a combination of a steady load of $60 \: kN$ and a load fluctuating between $10 \: kN$ and $90 \: kN$. The corrected endurance limit of the bar is $150 \: MPa$, the yield strength of the material is $480 \: MPa$ and the ... of safety is 2, the value of $a$ (in $mm$), according to the modified Goodman's criterion, is _____ (correct to two decimal places).
asked
Feb 17, 2018
in
Machine Design
by
Arjun
(
21.5k
points)
gate20182
0
votes
0
answers
GATE2018232
In a camfollower, the follower rises by $h$ as the cam rotates by $\delta$ (radians) at constant angular velocity $\omega$ (radians/s). The follower is uniformly accelerating during the first half of the rise period and it is uniformly decelerating in aht latter half of the ... velocity of the follower is $\frac{4h \omega}{\delta}$ $h \omega$ $\frac{2h \omega}{\delta}$ $2h \omega$
asked
Feb 17, 2018
in
Theory of Machines
by
Arjun
(
21.5k
points)
gate20182
0
votes
0
answers
GATE2018229
In a rigid body in plane motion, the point R is accelerating with respect to point P at $10 \angle 180^o \: m/s^2$. If the instantaneous acceleration of point $Q$ is zero, the acceleration (in $m/s^2$) of point $R$ is $8 \angle 233^o$ $10 \angle 225^o$ $10 \angle 217^o$ $8 \angle 217^o$
asked
Feb 17, 2018
in
Engineering Mechanics
by
Arjun
(
21.5k
points)
gate20182
0
votes
0
answers
GATE2018230
A rigid of length $1 \: m$ is resting at an angle $\theta =45^o$ as shown in the figure. The end $P$ is dragged with a velocity of $U=5 \: m/s$ to the right. At the instant shown, the magnitude of the velocity $V$ (in $m/s$) of point $Q$ as it moves along the wall without losing contact is 5 6 8 10
asked
Feb 17, 2018
in
Engineering Mechanics
by
Arjun
(
21.5k
points)
gate20182
0
votes
0
answers
GATE2018231
A bar of circular cross section is clamped at ends P and Q as shown in the figure. A torsional moment $T=150 \: Nm$ is applied at a distance of $100 \: mm$ from end $P$. The torsional reactions $(T_P, T_Q)$ in $Nm$ at ends $P$ and $Q$ respectively are $(50, 100)$ $(75, 75)$ $(100, 75)$ $(120, 30)$
asked
Feb 17, 2018
in
Mechanics of Materials
by
Arjun
(
21.5k
points)
gate20182
0
votes
0
answers
GATE201827
In a single degree of freedom underdamped springmassdamper system as shown in the figure, an additional damper is added in parallel such that the system still remains underdamped. Which one of the following statements is ALWAYS ... will increase Transmissibility will decrease Time period of free oscillations will increase Time period of free oscillations will decrease
asked
Feb 17, 2018
in
Vibrations
by
Arjun
(
21.5k
points)
gate20182
0
votes
0
answers
GATE201828
Pretensioning of a bolted joint is used to strain harden the bolt head decrease stiffness of the bolted joint increase stiffness of the bolted joint prevent yielding of the thread root
asked
Feb 17, 2018
in
Machine Design
by
Arjun
(
21.5k
points)
gate20182
0
votes
0
answers
GATE201825
The minimum axial compressive load, $P$, required to initiate buckling for a pinnedpinned slender column with bending stiffness $EI$ and length $L$ is $P=\frac{\pi^2 EI}{4L^2}$ $P=\frac{\pi^2 EI}{L^2}$ $P=\frac{3\pi^2 EI}{4L^2}$ $P=\frac{4\pi^2 EI}{L^2}$
asked
Feb 17, 2018
in
Mechanics of Materials
by
Arjun
(
21.5k
points)
gate20182
0
votes
0
answers
GATE201826
A frictionless gear train is shown in the figure. The leftmost 12teeth gear is given a torque of $100 \: Nm$. The output torque from the $60$teeth gear on the right in $Nm$ is 5 20 500 2000
asked
Feb 17, 2018
in
Machine Design
by
Arjun
(
21.5k
points)
gate20182
0
votes
0
answers
GATE2018153
The schematic of an external drum rotating clockwise engaging with a short shoe is shown in the figure. The shoe is mounted at point Y on a rigid lever XYZ hinged at point X. A force F=100 N is applied at the free end of the lever as shown. Given that the ... between the shoe and the drum is 0.3, the braking torque in (Nm) applied on the drum is _____ (correct to two decimal places)
asked
Feb 17, 2018
in
Machine Design
by
Arjun
(
21.5k
points)
gate20181
0
votes
0
answers
GATE2018154
Block P of mass 2 kg slides down the surface and has a speed 20 m/s at the lowest point, Q, where the local radius of curvature is 2m as shown in the figure. Assuming $g=10 \: m/s^2$, the normal force (in N) at Q is ____ correct to two decimal places.
asked
Feb 17, 2018
in
Engineering Mechanics
by
Arjun
(
21.5k
points)
gate20181
0
votes
0
answers
GATE2018148
The true stress $(\sigma)$  true strain $(\varepsilon)$ diagram of a strain hardening material is shown in figure. First, there is loading up to point A, i.e., up to stress of 500 MPa and strain of 0.5. Then from point A, there is unloading up ... MPa. Given that the Young's modulus E=200 GPa, te natural strain at point B$(\varepsilon_B)$ is _____ (correct to three decimal places)
asked
Feb 17, 2018
in
Mechanics of Materials
by
Arjun
(
21.5k
points)
gate20181
0
votes
0
answers
GATE2018150
A bar is compressed to half to its original length. The magnitude of true strain produced in the deformed bar is _____ (correct to two decimal places)
asked
Feb 17, 2018
in
Mechanics of Materials
by
Arjun
(
21.5k
points)
gate20181
0
votes
0
answers
GATE2018140
A machine of mass $m=200 \: kg$ is supported on two mounts, each of stiffness $k=10 \: kN/m$. The machine is subjected to an external force (in $N$) $f(t) = 50 \cos 5t$. Assuming only vertical translatory motion, the magnitude of the dynamic force (in N) transmitted from each mount to the ground is _____ (correct to two decimal places).
asked
Feb 17, 2018
in
Vibrations
by
Arjun
(
21.5k
points)
gate20181
0
votes
0
answers
GATE2018141
A slider crank mechanism is shown in the figure. At some instant, the crank angle is 45$^o$ and force of 40 N is acting towards the left on the slider. The length of the crank is 30 mm and the connecting rod is 70 mm. Ignoring the effect ... forces, the magnitude of the crankshaft torque (in Nm) needed to keep the mechanism in equilibrium is ______ (correct to two decimal places)
asked
Feb 17, 2018
in
Theory of Machines
by
Arjun
(
21.5k
points)
gate20181
0
votes
0
answers
GATE2018139
A simply supported beam of width 10 mm, height 200 mm and length 4 m is carrying a uniformly distributed load of intensity 10 kN/m. The maximum bending stress (in MPa) in the beam is _____ (correct to one decimal place)
asked
Feb 17, 2018
in
Mechanics of Materials
by
Arjun
(
21.5k
points)
gate20181
0
votes
0
answers
GATE2018132
A selfaligning ball bearing has a basic dynamic load rating $(C_{10}$, for $10^6$ revolutions) of 35 kN. If the equivalent radial load on the bearing is 45 kN, the expected life (in $10^6$ revolutions) is below 0.5 0.5 to 0.8 0.8 to 1.0 above 1.0
asked
Feb 17, 2018
in
Machine Design
by
Arjun
(
21.5k
points)
gate20181
0
votes
0
answers
GATE201818
For an Oldham coupling used between two shafts, which among the following statements are correct? Torsional load id transferred along shaft axis A velocity ratio of 1:2 between shafts is obtained without using gears Bending load id transferred transverse to shaft axis Rotation is transferred along shaft axis I and III I and IV II and III II and IV
asked
Feb 17, 2018
in
Machine Design
by
Arjun
(
21.5k
points)
gate20181
0
votes
0
answers
GATE2018111
In a linearly hardening plastic material, the true stress beyond initial yielding increases linearly with the true strain decreases linearly with the true strain first increases linearly and then decreases linearly with the true strain remains constant
asked
Feb 17, 2018
in
Mechanics of Materials
by
Arjun
(
21.5k
points)
gate20181
0
votes
0
answers
GATE201815
A bar of uniform cross section and weighing 100 N is held horizontally using two massless and inextensible strings S1 and S2 as shown in the figure The tensions in the strings are $T_1=100 \: N \text{ and } T_2=0 \: N$ $T_1=0 \: N \text{ and } T_2=100 \: N$ $T_1=75 \: N \text{ and } T_2=25 \: N$ $T_1=25 \: N \text{ and } T_2=75 \: N$
asked
Feb 17, 2018
in
Engineering Mechanics
by
Arjun
(
21.5k
points)
gate20181
+1
vote
1
answer
GATE2017240
A rod of length $20$ mm is stretched to make a rod of length $40$ mm. Subsequently, it is compressed to make a rod of final length $10$ mm. Consider the longitudinal tensile strain as positive and compressive strain as negative. The total true longitudinal strain in the rod is $0.5$ $0.69$ $0.75$ $1.0$
answered
May 8, 2017
in
Mechanics of Materials
by
Debashish Deka
(
470
points)
gate20172
0
votes
0
answers
GATE2014336
Consider a rotating disk cam and a translating roller follower with zero offset. Which one of the following pitch curves, parameterized by $t$, lying in the interval $0$ to $2π$ ... $cost$ , $y(t)=2sint$ $x(t)$= $\frac{1}{2}$+$cost$ , $y(t)=sint$
asked
Feb 19, 2017
in
Theory of Machines
by
Arjun
(
21.5k
points)
gate20143
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Recent questions and answers in Applied Mechanics and Design
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