GATE ME 2019: Topper's Quiz-15 (App update required to attempt this test) for ESE & GATE ME Exams

Question 1

A material is said to be“even material”, if material

Question 2

The arrangement shown in the figure measures the velocity V of a gas of density 1 kg/m³ flowing through a pipe. The acceleration due to gravity is 9.81 m/s². If the manometric fluid is water (density 1000 kg/m³) and the velocity V is 20 m/s, the differential head h (in mm) between the two arms of the manometer is _____

Question 3

Glycol is heated by hot water in a 20-tube pass heat exchanger. The length of the tube is 2000mm. If inner and outer diameter of the heat exchanger are 12mm and 15mm respectively, what will be the the inner surface area for heat transfer ?

Question 4

Consider the following linear programming problem

Subjected to

Dual of the above given primal of LP

Question 5

A flat plate(3x4)m² is immersed in a liquid having constant temperature of 27

and the plate temperature is 127

if the heat transferred from the plate to the liquid at the rate of 500kW. Assume that heat transfer is at steady state. Find the heat transfer coefficient(in W/m²k ) of the liquid side ______.

Question 6

A spur gear is used to transmit power between two parallel shafts. The module of the shaft is 3 mm. Tooth thickness is define as 3 times module and tooth space is defined as 2.9 times module. Find the backlash of the gear arrangement in mm

Question 7

In balancing of a slider crank mechanism, The magnitude of the secondary forces is________ than the magnitude of the primary force.

Question 8

Kindling temperature is at which?

Question 9

A Bearing was used for combined thrust and radial loads at high speed. If the bearing is operating at load of 2kN, has a life of 900 hrs. what will be the life of the bearing if the load is halved ?

Question 10

Which of the following has least percentage of carbon ___________?

Question 11

A steel bar of 10 × 50 mm is cantilevered with two M 12 bolts (P and Q) to support a static load of 4 kN as shown in the figure.

The primary and secondary shear loads on bolt P, respectively, are

Question 12

A mass of 2000 kg is currently being lowered at a velocity of 2 m/s from the drum as shown in the figure. The mass moment of inertia of the drum is 150 kg-m². On applying the brake, the mass is brought to rest in a distance of 0.5 m. The energy absorbed by the brake (in kJ) is

Question 13

ECM is performed on a material having following alloyingcombination

Take I = 500 amp and density of alloy = 8.28 g/cm³

The material removal rate(upto two places of decimal) in cm³/hour of the alloy will be

Question 14

An ECM process is carried out with an iron plate (atomic weight=56gm, valency =2) with an electric current of 480 Ampere. The density of the iron is equal to 7.6 gm/cm³. Using faraday law of electrolysis, Find the material removal rate in ______ cm³/sec.

Question 15

A carpenter glues a pair of cylindrical wooden logs by bonding their end faces at an angle of θ= 30° as shown in the figure.

The glue used at the interface fails if
Criterion 1 : the maximum normal stress exceeds 2.5 MPa
Criterion 2 : the maximum shear stress exceeds 1.5 MPa
Assume that the interface fails before the logs fail. When a uniform tensile stress of 4 MPa is applied, the interface

Question 16

A bar of 3m length, 30 mm breadth, and 20 mm thickness is subjected to a compressive stress of 50 KN/m². What will be the final change in volume of the bar, if Poisson’s ratio is 0.30 and modulus of rigidity is 90GN/m² ?

Question 17

In a crank and slotted lever mechanism, the distance between the fixed centres is 40 mm and the length of the crank is 20 mm. Find the ratio of the max return velocity to the maximum cutting velocity.

Question 18

In an Oldham’s Coupling, the maximum velocity of sliding is 0.302 m/s. The driving shaft revolves at 160 rpm. Find the distance between the two parallel shafts (in mm) ___________.

Question 19

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A piston cyclinder arrangement as shown above, contains air at 250 kPa, 300⁰C. The 50 kg piston has a diameter of 0.1 m and initially pushes against stops. The atmospheric pressure is 100 kPa and temperature is 20⁰C.The cyclinder cools as heat is transferred to the ambient.At what temperature (in ⁰C) does the piston begin to move down?

Question 20

An air bottle of 0.1 m³ volume contains air at 3.5 bar pressure.The air is used to drive a turbo-generator supplying power to device which consumes 10W.The ambient pressure is 1 bar and actual output of the turbo generator is 60% of the maximum theorectical output. Evaluate the time (in min) for which the device can be operated. ( for air, $Description: Description: 02_Thermodynamics_BLok_files\image065.png$ )