Match the CORRECT pairs Processes Characteristics / Application P.  Friction Welding 1.  Non-consumable electrode Q.  Gas Metal Arc Welding 2.  Joining of thick plates R.  Tungsten Inert Gas Welding 3.  Consumable electrode wire S.  Electroslag Welding 4.  Joining of cylindrical dissimilar materials

1.  P-4;Q-3;R-1;S-2

2.  P-4;Q-2;R-3;S-1

3.  P-2;Q-3;R-4;S-1

4.  P-2;Q-4;R-1;S-3

4

P-4;Q-3;R-1;S-2

Explanation :
No Explanation available for this question

A metric  thread  of  pitch  2mm  and  thread  angle  60º  is  inspected  for  its  pitch diameter using 3-wire method. The diameter of the best size wire in mm is

1.  0.866

2.  1.000

3.  1.154

4.  2.000

4

1.154

Explanation :
No Explanation available for this question

Customers  arrive  at  a  ticket  counter  at  a  rate  of  50  per  hour  and  tickets  are issued in the order of their arrival. The average time taken for issuing a ticket is 1min. Assuming that customer arrivals form a Poisson process and service times are exponentially distributed, the average waiting time in queue in minutes is

1.  3

2.  4

3.  5

4.  6

4

5

Explanation :
No Explanation available for this question

In simple exponential smoothing  forecasting, to give higher weightage to recent  demand information, the smoothing constant must be close to

1.  -1

2.  0

3.  0.5

4.  1

4

1

Explanation :
No Explanation available for this question

A steel bar 200 mm in diameter is turned at a feed of 0.25 mm/rev with a depth of cut of 4 mm. The  rotational speed of the workpiece  is 160 rpm. The material removal rate in mm3/s is

1.  160

2.  167.6

3.  1600

4.  1675.5

4

1675.5

Explanation :
No Explanation available for this question

A  cube  shaped  casting solidifies  in 5 minutes. The  solidification  time  in minutes for a cube of the same material, which is 8 times heavier than the original casting will be

1.  10

2.  20

3.  24

4.  40

4

20

Explanation :
No Explanation available for this question

For a ductile material, toughness is a measure of

1.  Resistance to scratching

2.  Ability to absorb energy up to fracture

3.  Ability to absorb energy till elastic limit

4.  Resistance to indentation

4

Ability to absorb energy up to fracture

Explanation :
No Explanation available for this question

In order to have maximum power from a Pelton turbine, the bucket speed must be

1.  Equal to the jet speed

2.  Equal to half the jet speed

3.  Equal to twice the jet speed

4.  Independent of the jet speed

4

Equal to half the jet speed

Explanation :
No Explanation available for this question

Consider one-dimensional steady state heat conduction along x-axis  (0≤x≤L ), through a plane wall with the boundary surfaces  ( X=0 and X=L) maintained at temperatures  0ºC  and 100ºC. Heat  is generated uniformly throughout the wall. Choose the CORRECT statement

1.  The direction of heat transfer will be from the surface at 100ºC to surface at 0ºC

2.  The maximum temperature inside the wall must be greater than 100ºC

3.  The temperature distribution is linear within the wall

4.  The temperature distribution is symmetric about the mid-plane of the wall

4

The maximum temperature inside the wall must be greater than 100ºC

Explanation :
No Explanation available for this question

1.  804.7

2.  953.2

3.  981.7

4.  1012.2

4