BARC ME 2019: Mini Mock-2 for ESE & GATE ME Exams

Question 1

The back stress developed due to repulsive action of dislocation-dislocation at grain boundary is called

Question 2

The velocity V (m/s) of a car at a distance ‘s’ from a point on its path is given by the table:

The time taken in second (s) to travel 60m by using Simpson’s 1/3 rule is:

Question 3

A gun is mounted on a railroad car. The mass of the car, the gun, the shell, and operator is 100 kg, whereas mass of one shell is 10kg. If the velocity of the shell with respect to the gun (in its state before firing) is 300 m/s then the recoil speed of the car with respect to ground after the second shot is (neglect friction)

Question 4

Water of mass density 1000 kg/m³ is transported using a pipe of diameter 40 cm. Flow in the pipe is turbulent. If the flow velocity at the centre and that at a 5 cm distance from centre of pipe are 5 m/s and 4 m/s respectively, then the value of wall shear stress (in Pa) will be

Question 5

An airplane, travels through still air at 300 km/hr, is having two propellers of 2.5 m diameter. Take density of still air as 1.22 kg/m³. The difference of pressure (in kPa) across a propeller, if discharge through each propeller is 480 m³/s, will be

Question 6

A refractory material contains surface 1 which has ε=0.45 at 1600K which is parallel to surface 2 having emissivity of 0.5 at 1500Kis exposed to black furnaces wall at 1600K. What is rate of heat flux from the furnaces?

Question 7

The following table shows the initial basic feasible solution obtained:

The above solution obtained is ___________.

Question 8

Interference is gearing between the gears and the pinion arrangement can be avoided by which of the following process

Question 9

In two stage wire drawing operating the fractional reduction ratio is 0.4. fraction reduction in 2^nd stage is 0.3. overall fractional reduction is

Question 10

A horizontal steel bar of length 200 mm and area 200 mm² is struck at its free end by a heavy block of mass 40 kg moving horizontally with a velocity of 10 m/s. If the weight of the block is applied as an axial compressive load then the impact factor is (take E = 2×10⁵ N/mm², g = 10m/s²)

Question 11

The turning moment diagram for a multi cylinder engine is drawn to a scale, turning moment, 1 mm = 50 N-m; crank angle, 1 mm = 2

. The intercepted areas above and below the mean turning moment line is shown in figure. The mass of the rotating parts are equivalent to a mass of 30 kg at radius of gyration of 120 mm. The coefficient of steadiness when the engine runs at a speed of 1200 rpm is

Question 12

A solar collector receiving solar radiation at the rate of 0.5 KW/m² at temperature 80

and transforms it to a fluid within heat engine. The engine rejects energy as heat at temperature of 25

. The minimum collector area (in m² ) if the plant produces 2 KW of useful shaft power is

Question 13

What is the maximum work that can be obtained, if one kg of water at 90 °C is cooled to ambient temperature of 27 °C (Specific heat of water = 4.18 kJ/kg-K).

Question 14

A parallelepiped enclosure measures 3 m × 3.5 m with 4 m height. The bottom floor having 0.75 emissivity is maintained at 380 K and all other surfaces (emissivity = 0.8) are maintained at 505 K. The net radiation (in kW) to the floor will be

Question 15

A fluid flow is represented by the velocity field,

. The rotational component (ω_z) and rate of shear strain (γ_xy) respectively are________.

Question 16

500 kW power generated by a large hydraulic turbine at 1000 rpm under a head of 40 m. A 1:5 scale model of turbine operates under a head of 10 m. Power generated by model (in kW) will be _______.

Question 17

A wooden block rests on a horizontal force as shown in figure. The force (P) acting (in N) on it at an angle of 25 ° with horizontal. Assume the mass of block to be 8 Kg and coefficient of friction is 0.45.

The force (P) is:

Question 18

Specific entropy of a system of 50 kg mass, increases from 0.7 kJ/kgK to 0.8 kJ/kgK. At the same time the entropy of surroundings decreases from 160 kJ/K to 150 kJ/K. The process is

Question 19

A cam with uniform acceleration and retardation with 20 mm/s² . During 120

of rotation of the cam, the follower raised by 20 mm, find the accelerating period of the follower in seconds. Consider no jerk during the motion of the follower.

Question 20

A thin cylindrical pressure vessel of diameter 800 mm and wall thickness 10 mm is given a coating which cracks when the strain reaches to 0.0002. The internal pressure (in MPa) at which cracking start in coating is (Take E = 210 GPa, Poisson ratio = 0.25)