GATE 2021 ME : Toppers Quiz 11 (App update required to attempt this test)

For the analysis of thick cylinders, the theory applicable is

What is the maximum in plane shear stress of a thin cylinder, if it has a diameter of d, thickness of t and the gauge pressure in the cylinder is p?

Ratio of maximum shear stress developed in a rectangular cross-section beam to that developed in a circular cross-section beam for the same average shear stress is

An eight-speed drilling machine uses drill of diameter ranging from 6mm to 36mm where the cutting speed is constant 15m/min. The ratio of any two consecutive speeds is_____

In a single-cylinder reciprocating engine, the mass of reciprocating parts is 55 kg and the mass of revolving parts is 30 kg. The speed of the engine is 200 rpm and the stroke length is 300 mm. If 65 % of the reciprocating parts and all the revolving parts are to be balanced then the required balance mass at a radius of 270 mm is ___ kg.

The rod AB, of length 1 m, shown in the figure is connected to two sliders at each end through pins. The sliders can slide along QP and QR. If the velocity VA of the slider at A is 2 m/s, the velocity of the midpoint of the rod at this instant is ________m/s.

The cost of proving service in a queuing system increases with

For a Kaplan (axial flow) turbine, the outlet blade velocity diagram at a section is shown in figure.

2 kg of air initially at 7 bar pressure and 400 K expands polytropically (PV^1.2 = Constant) until the pressure is reduced to one-fifth value.The change in entropy (in kJ/K )  is _____. (Take R= 0.287 kJ/kgK and γ=1.4)

The figure below shows the TTT diagram of eutectoid steel for which the following microstructures are to be matched :

1) Fine pearlite

2) Martensite

3) Bainite

4) Coarse pearlite

The correct match will be :

The work required (magnitude in KJ/kg) to compress the steam isentropically from 1 bar to 8 bar. Assume the initial state of vapour is saturated vapour. Use the following table: