ME GATE 2013 - Online Test
Q1. During the electrochemical machining (ECM) of iron (atomic weight=56,
valency=2) at current of 1000 A with 90% current efficiency, the material
removal rate was observed to be 0.26 gm/s. If Titanium (atomic weight = 48,
valency=3) is machined by the ECM process at the current of 2000 A with 90%
current efficiency, the expected material removal rate in gm/s will be
Answer : Option C
Explaination / Solution:
Q2. In orthogonal turning of a bar of 100 mm diameter with a feed of 0.25 mm/rev,
depth of cut of 4 mm and cutting velocity of 90 m/min, it is observed that the
main (tangential) cutting force is perpendicular to the friction force acting at the
chip-tool interface. The main (tangential) cutting force is 1500 N.
The normal force acting at the chip-tool interface in N is
Answer : Option B
Explaination / Solution:
No Explaination.
Q3. Complete the sentence:
Universalism is to particularism as diffuseness is to ________
Answer : Option A
Explaination / Solution:
The relation is that of antonyms
Q4. Were you a bird, you ___________ in the sky.
Answer : Option A
Explaination / Solution:
No Explaination.
Q5. Specific enthalpy and velocity of steam at inlet and exit of a steam turbine,
running under steady state, are as given below:
Specific enthalpy (kJ/kg) Velocity(m/s)
Inlet steam condition 3250 180
Exit steam condition 2360 5
The rate of heat loss from the turbine per kg of steam flow rate is 5 kW.
Neglecting changes in potential energy of steam, the power developed in kW by
the steam turbine per kg of steam flow rate, is
Answer : Option C
Explaination / Solution:
Q6. Water is coming out from a tap and falls vertically downwards. At the tap
opening, the stream diameter is 20mm with uniform velocity of 2 m/s.
Acceleration due to gravity is 9.81m / s2. Assuming steady, inviscid flow,
constant atmospheric pressure everywhere and neglecting curvature and surface
tension effects, the diameter is mm of the stream 0.5m below the tap is
approximately
Answer : Option B
Explaination / Solution:
No Explaination.
Q7. A steel ball of diameter 60 mm is initially in thermal equilibrium at 1030 C° in a
furnace. It is suddenly removed from the furnace and cooled in ambient air at
30 C° , with convective heat transfer coefficient h=20 W / m2 K. The thermophysical
properties of steel are: density ρ = 7800 kg / m3, conductivity k = 40 W/mK and specific heat c=600 J/kgK. The time required in seconds to cool
the steel ball in air from 1030 C° to 430 C° is
Answer : Option D
Explaination / Solution:
Q8. A flywheel connected to a punching machine has to supply energy of 400 Nm
while running at a mean angular speed of 20 radians/s. If the total fluctuation of
speed is not to exceed ±2% , the mass moment of inertia of the flywheel in kg m2− is
Answer : Option A
Explaination / Solution:
Q9. A single degree of freedom system having mass 1 kg and stiffness 10kN/m
initially at rest is subjected to an impulse force of magnitude 5 kN for 10-4 seconds. The amplitude in mm of the resulting free vibration is
Answer : Option C
Explaination / Solution:
No Explaination.
Q10. Two large diffuse gray parallel plates, separated by a small distance, have
surface temperatures of 400 K and 300 K. If the emissivities of the surfaces are
0.8 and the Stefan-Boltzmann constant is 5.67 × 10-4 W / m2 K4, the net radiation
heat exchange rate in kW / m2 between the two plates is
Answer : Option A
Explaination / Solution:
