GATE 2021 ME : Toppers Quiz 26 (App update required to attempt this test) for ESE & GATE ME Exams

Question 1

What does ‘a’ and ‘e’ indicate in the surface texture symbol shown below

Question 2

Change in entropy of universe during reversible cyclic processes is

Question 3

Which type of stress is developed at the cross section of the shaft when it is subjected to a twisting moment?

Question 4

The Ericsson cycle consists of _______.

Question 5

“The velocity of entrance and exit through a nozzle remains the same.” Is this ever possible?

Question 6

Misrun is a casting defect which occurs due to

Question 7

A pump delivers water at a rate of 0.25 m³/s against a head of 20 m .If the overall efficiency of the pump is 50%, the power required by the pump is _________.

Question 8

If the ratio of the diameter of rivet hole to the pitch of rivets is 0.25, then the efficiency of the joint is.

Question 9

Which of the following is also known as military organisation?

Question 10

The moisture in a refrigerant is removed by

Question 11

A machine tool company decides to make four sub-assemblies through three contractors differing in efficiency. Given below are the estimates of the time in hours matrix. The minimum time in minutes is?

Question 12

In a steady flow of water, water is coming in through Pipe 1 (area 1 m², velocity 1 m/s) and Pipe 2 (area 2 m², velocity 2 m/s) and going out through Pipe 3 (area 2.5 m²). The exit velocity of Pipe 3 is?

Question 13

In a slab milling, the average thickness is 0.031 mm. If diameter of cutter = 90 mm, Number of teeth on cutter = 10, cutting speed = 30 m/min, table feed = 180 mm/min, the depth of cut will be _________ mm.

Question 14

Two identical trusses support a load of 100 N as shown in the figure. The length of each truss is 1.0 in: cross-sectional area is 200 〖mm〗^2; Young's modulus E = 200 GPa. The force in the truss AB (in N) is _________.

Question 15

One side of a wall is maintained at 400 K and the other at 300 K. The rate of heat transfer through the wall is 1000 W and the surrounding temperature is 25 °C. Assuming no generation of heat within the wall, the irreversibility (in W) due to heat transfer through the wall is______

Question 16

Coriolis acceleration (m/s²) of a slider moving at 100 m/s on a link rotating at 60 rpm will ___________.

Question 17

A pelton turbine is to operate under a net head of 500 m at 420 rpm. If a single jet with diameter 18 cm is used, find the specific speed of the machine. Take C_v = 0.98, ϕ = 0.45 and overall efficiency

.

Question 18

A boy drops a ball from a height of 9 m on a concrete ground. The ball then bounces from the ground vertically upwards. The coefficient of restitution is 0.8 What will be the velocity of the ball when it reach’s a height of 2m. ________

Question 19

Match the following Theories:

Question 20

A merchant forecasts the demand at rate of 100e^x per months for the next three months where x is respective month. The actual demand turned out to be 200,839 and 2100. The BIAS of the forecast will be

Question 21

A 200 mm diameter pipeline is laid on the ground. At a particular point, the piezometric head is 20 m. Total energy head of water at a point is 26 m. The Discharge (L/s) of water through the pipe is ______.

Question 22

A cyclic device operates between three thermal reservoirs, as shown in the figure. Interactions between the cyclic device and the respective thermal reservoirs are shown in the figure and all are in the form of heat transfer. The cyclic device can be _____.

Question 23

A spherical water droplet of 1.2 mm in diameter splits in air into 60 smaller droplets of equal size. Find the work in micro Joule required in splitting up the droplet. The surface tension of water in air is 0.073 N/m.

Question 24

What is the shape factor of a hemisphere body placed on a flat surface with respect to itself?

Question 25

Steam flows at the rate of 5

at a particular section in a reaction turbine where the diameter of blade is 2m and the velocity of flow is 6m/s. What is the blade height of section _________mm.