ISRO ME 2019: MOCK 2 for ESE & GATE ME Exams

Question 1

A particle starts moving along a circle of radius (20/π) m with constant tangential acceleration. If velocity of the particle is 50 m/s at the end of the second revolution after motion has begun, the tangential acceleration in ms^–2 is

Question 2

A water-mercury manometer has a difference in elevation of meniscus of 650mm. What will be the difference in pressure?

Question 3

Ledeburite consists of ________.

Question 4

The approximate value of y(0.1) from dy/dx=x²y-1, y(0)=1 is

Question 5

Let E and F be any two events with P(EUF)=0.8, P(E)=0.4 and P(E/F)=0.3. Then P(F) is

Question 6

Consider a steady fully, developed flow in a horizontal pipe of diameter D. Over a section of length L of the pipe, a pressure drop of

is observed. Wall shear stress for the section is

Question 7

Calculate the force which needs to be applied to pull a flat plate having an area of 0.20 m²at a velocity of 25 cm/sec which is parallel to a stationary plate situated at a spacing of 0.02 cm, which is filled a Newtonian fluid having 0.004 Ns/m²?

Question 8

Thermal Resistance of Radial Conduction through hollow cylinder is:

Question 9

For which value of x, will the Matrix

become singular?

Question 10

A Composite slab is made up of two Materials having Conductivity in the ratio of 1:3 and thickness is in the ratio of 2:3. If the temperature of both the faces of the slab is 700 K & 300 K respectively, what will be the interface temperature?

Question 11

Find a particular integral of the differential equation $Description: Description:ISROME2009_files\image264.png$

Question 12

An oil of kinematic viscosity 0.25 stokes flow through a pipe of diameter 10cm.The flow is critical at a velocity of

Question 13

For a fluid flowing over a flat plate, the Nusselt number at a point 0.5 from the Leading edge is 200. If the thermal conductivity of plate is

& that of fluid is 0.025

. Then, local heat transfer coefficient will be

Question 14

A body is maintained at 1300 K and Normal intensity of radiation from body is 7 W/m²-steradian. Then the intensity of radiation __________, along a direction at angle of 60° with respect to normal.

Question 15

The following data pertain to a worker : base rate = Rs. 20 per hour.
Time taken for completing the job = 2 hours
Standard time = 3 hours
Under Halsey plan the total earning of the worker is

Question 16

The Brinell hardness number (BHN) of Sorbite is ______.

Question 17

A component is subjected to variable loading of 100 MPa in tension to 50 MPa in compression. Stress ratio & Amplitude ratio for this condition will be respectively______.

Question 18

A journal bearing of 100 mm length and 50 mm diameter carrying load of 5 kN at 1200 rpm. Viscosity of lubricant used is 25 mPa-S. If radial clearance is 0.05 mm then, Sommerfield number will be______.

Question 19

In case of USM, with increasing mean grain diameter of the abrasive materials, MRR would __________.

Question 20

In a mechanical workshop, while machining of an object on a Shaper machine, a Ratio of return time to cutting time obtained is 2:3, If the work-piece is 200 mm long & is machined at a cutting speed of 180 m/min. The crank RPM thus obtained will be approximate __________.

Question 21

During a rolling process, a sheet of

thick is rolled down to

thickness. If the roll of diameter

rotates at

, calculate the approximate roll strip contact length?

Question 22

A clutch has 100 mm outer and 50 mm inner diameter. Normal force applied between plates is 10 kN and friction coefficient of a liner material is 0.2. According to uniform wear theory, torque carrying capacity of the clutch will be ___________.

Question 23

When an axial load of 50 kN is gradually applied to a copper rod of cross-sectional area 2 cm² it elongate 0.0025 cm over a 5 cm gauge length. What is the strain energy stored in the rod at this point?

Question 24

Calculate the required blanking force (in kN) if a disc of 300 mm diameter is blanked from a strip of an Al-Cu alloy of thickness 6.2 mm and the fracture material shear strength is 150 MPa.

Question 25

A casting of size 200 × 200 × 70 mm³, solidifies in 10 min. Under similar conditions, what will be the solidification time for 200 × 100 × 10 mm³ size?

Question 26

A thin cylindrical pressure vessel is filled with a fluid at pressure 100MPa. The vessel is also subjected to an external pressure of 50MPa. If the diameter of the vessel is 70mm and the permissible stress in the material is 200MPa, then calculate the minimum thickness that should be used so as to prevent the vessel from bursting.

Question 27

A bar made of conductor material is fixed at one end and free at the other end. If current is passed now, such that the bar gets uniformly heated then which of the following statements is true? Initial length of rod = L, coefficient of thermal expansion =

, rise in temperature =

Question 28

For a beam of triangular crossection, what is the ratio of maximum shear stress (τ_max) to the average shear stress developed (τ_min)?

Question 29

A column of flexural Rigidity (35 × 10⁶) N-mm² has both ends fixed. If length of the column is 2m, what will be the critical buckling load, that will be enough to Buckle the column?

Question 30

For angle measurement in Metrology, which of the following pairs given in below alternatives can be best used:

Question 31

A flywheel of mass 714 kg is employed in a multi cylinder engine and gives a coefficient of fluctuation of speed as 0.05. The safe centrifugal stress for the flywheel is 9 MPa and the density of material is 7000 kg/m³. If the engine is running at 900 rpm and width of flywheel is 5 times its thickness then, calculate the thickness of the rim ___________.

Question 32

A single cylinder reciprocating engine running at 180rpm has a stroke of 400mm. If the mass of reciprocating parts is 40kg and revolving part is 25kg at crank radius. Calculate the amount of mass balance required at a radius of 300mm provided 50% of revolving masses are balanced?

Question 33

For the figure shown below of a 4 - Bar mechanism; link 2 & 4 have same length. Which of the following will be generated by the Point “P” on the coupler 3?

Question 34

A vibrating system with viscous damping will return to its equilibrium position in shortest time if it is _______.

Question 35

In a steam power plant, two cycles are coupled in series, where the first cycle has an efficiency of 30% and the second cycle has an efficiency of 20%. Determine the combined overall cycle efficiency:

Question 36

Consider a heat engine operative in a cycle between temperature range

to

what will be the lowest rate of heat rejection per kilowatt net output of the prime-mover?

Question 37

Which of the following factors aids in increasing detonation in SI engine?

1) Increase in spark advance

2) Higher speed

3) Increased air-fuel ratio on the far side of stoichiometric strength

4) Higher compression ratio.

Select the exact answer from below options:

Question 38

A vibrating system with mass 4kg and stiffness 36N/m and a damper has a damping coefficient of 12 Ns/m. Calculate the time period of oscillation (s) when an exciting force of 27sin3t is applied. (Take 0.866² = 0.75).

Question 39

Calculate the air-fuel ratio on molar basis that could come out: Inside an Oil marketing R&D lab, Methane

is made to undergo combustion with the stoichiometric quantity of air.