ME GATE 2007 - Online Test
Q1. In electrodischarge machining (EDM), if the thermal conductivity of tool is high
and the specific heat of work piece is low, then the tool wear rate and material
removal rate are expected to be respectively
Answer : Option A
Explaination / Solution:
No Explaination.
Q2. In orthogonal turning of medium carbon steel, the specific machining energy
is 2.0 J/mm3. The cutting velocity, feed and depth of cut are 120 m/min,
0.2 mm/rev. and 2 mm respectively. The main cutting force in N is
Answer : Option D
Explaination / Solution:
No Explaination.
Q3. A direct current welding machine with a linear power source characteristic provides open circuit voltage of 80 V and short circuit current of 800 A. During welding with the machine, the measured arc current is 500 A corresponding to an arc length of 5.0 mm and the measured arc current is 460 A corresponding to an arc length of 7.0 mm. The linear voltage (E) arc length (L) characteristic of the welding arc can be given as (where E is in volt and L in in mm)
Answer : Option A
Explaination / Solution:
No Explaination.
Q4.
A hole is specified as 
The mating shaft has a clearance fit with
minimum clearance of 0.01 mm. The tolerance on the shaft is 0.04 mm. The
maximum clearance in mm between the hole and the shaft is
The mating shaft has a clearance fit with
minimum clearance of 0.01 mm. The tolerance on the shaft is 0.04 mm. The
maximum clearance in mm between the hole and the shaft is
Answer : Option C
Explaination / Solution:
Q5. In orthogonal turning of low carbon steel pipe with principal cutting edge angle
of 90o, the main cutting force is 1000 N and the feed force is 800 N. The shear
angle is 25o and orthogonal rake angle is zero. Employing Merchant’s theory, the
ratio of friction force to normal force acting on the cutting tool is
Answer : Option C
Explaination / Solution:
Q6.
The speed of an engine varies from 210 rad/s to 190 rad/s. During the cycle the
change in kinetic energy is found to be 400 Nm. The inertia of the flywheel in
kg/m2 is
Answer : Option A
Explaination / Solution:
No Explaination.
Q7. The input link O2P of a four bar linkage is rotated at 2 rad/s in counter clockwise
direction as shown below. The angular velocity of the coupler PQ in rad/s, at an
instant when O4O2P = 180o, is
Answer : Option C
Explaination / Solution:
No Explaination.
Q8. The natural frequency of the system shown below is
Answer : Option A
Explaination / Solution:
Q9. The piston rod of diameter 20 mm and length 700 mm in a hydraulic cylinder is
subjected to a compressive force of 10 kN due to the internal pressure. The end
conditions for the rod may be assumed as guided at the piston end and hinged
at the other end. The Young’s modulus is 200 GPa. The factor of safety for the
piston rod is
Answer : Option C
Explaination / Solution:
Elusive: Difficult to answer.
Q10. During inelastic collision of two particles, which one of the following is conserved?
Answer : Option A
Explaination / Solution:
No Explaination.
