GATE 2021 ME : Toppers Quiz 18 (App update required to attempt this test) for ESE & GATE ME Exams

Question 1

If two gases having same initial conditions (P, V, T) are mixed in a container of volume ‘2V’ and temperature ‘T’, then the pressure of the mixture will be

Question 2

A cube strikes a stationary ball exerting an average force of 50 N over a time of 10 mili sec. The ball has mass of 0.20 kg. Its speed after the impact will be

Question 3

Which law of thermodynamics will be violated, if the thermal efficiency of an engine becomes 100%?

Question 4

A small ball of mass 1 kg moving with a velocity of 8 m/s undergoes a direct central impact with a stationary ball of mass 2 kg. the impact is perfectly elastic. The speed of 2 kg mass ball after the impact is _________.

Question 5

As per maximum shear stress theory of failure. The relation between yield strength in shear (𝜏_𝑦) and yield strength in tension (σ_t) is __________.

Question 6

The feed of a tool with nose diameter = 4 mm, is 6 mm. Find peak to valley height ___________.

Question 7

A certain air has DBT 35^oC and DPT of 20^oC, the corresponding saturation pressure of water being 5.628 kPa and 2.33 kPa respectively. When the atmospheric pressure is assumed as 1.0132 bar, the specific humidity of air will be

Question 8

A heat pump operating on Carnot cycle pumps heat from a reservoir at 27°C to a reservoir at 327°C The coefficient of performance is :

Question 9

Modulus of resilience is the area under the curve of_____.

Question 10

Which cycle consists of two reversible isotherms and two reversible isobars?

Question 11

A bar made of ductile material is subjected to maximum and minimum stresses of 150N/mm² and 50N/mm² and has an endurance limit of 194N/mm² and yield strength of 296N/mm². The fatigue stress concentration factor is 1.The available factor of safety for this loading is

Question 12

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 $Description: D:\GradeStack Courses\GATE Tests (Sent by Ravi)\GATE-ME-2014-Set-1_files\image128.png$ and bearing is lubricated with an oil having viscosity 0.03 Pa.s, the Sommerfeld number of the bearing is ______

Question 13

A riveting machine is driven by a motor of 5 kW. The actual time to complete one riveting operation is 1.5s and it absorbs 10 kN-m of energy. The moving parts including the flywheel are equivalent to 200 kg at 0.5m radius of gyration. Speed of flywheel (in rad/s) after riveting, if it was 350 rpm before riveting will be

Question 14

A 20° full depth involute system have a pinion of diameter 300 mm and number of teeth on pinion is 60. If the length of line of action is 20 mm, then the contact ratio is _______.

Question 15

For an under damped system, if the ratio of two successive peak is 10, then the minimum damping ratio (ζ) will be

Question 16

For a statically determinate frame, which of the following is the correct graph between number of members and number of joints?

Question 17

What will be the tensile yield strength if the factor of safety is taken as 2. The values of principle stresses σ₁ = 35 MPa andσ₂ = -115 MPa were calculated from the Mohr’s circle. Use Maximum distortion energy theory.

Question 18

Which of the following is a false statement about work hardening?

Question 19

The natural frequency of the system in cycles/s is
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Question 20

Which of the following assumption are taken during forming in slab method?