# In the velocity diagram shown below, u = blade velocity, C = absolute fluid velocity and w = relative velocity of fluid and the subscripts 1 and 2 refer to inlet and outlet. This diagram is for

1.  An impulse turbine

2.  A reaction turbine

3.  A centrifugal compressor

4.  An axial flow compressor

4

A reaction turbine

Explanation :
No Explanation available for this question

# A leaf is caught in a whirlpool. At a given instant, the leaf is at a distance of 120 m from the center of the whirlpool. The whirlpool can be described by the following velocity distribution: Vr = - ( 60 x 103 / 2πr )m/s and V0 = 300 x 103 / 2πr m/s, where r (in meters) is the distance from the center of the whirlpool. What will be the distance of the leaf from the center when it has moved through half a revolution

1.  48 m

2.  64 m

3.  120 m

4.  142 m

4

142 m

Explanation :
No Explanation available for this question

# A mould has a downsprue whose length is 20 cm and the cross sectional area at the base of the downspure is 1 cm2. The downsprue feeds a horizontal runner 2 leading into the mould cavity of volume 1000 cm3. The time required to fill the 3 mould cavity will be

1.  4.05 s

2.  5.05 s

3.  6.05 s

4.  7.25 s

4

5.05 s

Explanation :
No Explanation available for this question

# A 2 mm thick metal sheet is to be bent at an angle of one radian with a bend radius of 100 mm. If the stretch factor is 0.5, the bend allowance is

1.  99 mm

2.  100 mm

3.  101 mm

4.  102 mm

4

101 mm

Explanation :
No Explanation available for this question

# Spot welding of two 1 mm thick sheets of steel (density = 8000 kg/m3) is carried out successfully by passing a certain amount of current for 0.1 second through the electrodes. The resultant weld nugget formed is 5 mm in diameter and 1.5 mm thick. If the latent heat of fusion of steel is 1400 kJ/kg and the effective resistance in the welding operation is 200, the current passing through the electrodes is approximately

1.  1480 A

2.  3300 A

3.  4060 A

4.  9400 A

4

4060 A

Explanation :
No Explanation available for this question

# A 600 mm x 300 mm flat surface of a plate is to be finish machined on a shaper. The plate has been fixed with the 600 mm side along the tool travel direction. If the tool over-travel at each end of the plate 20 mm, average cutting speed is 8 m/min, feed rate is 0.3 mm/stroke and the ratio of return time to cutting time of the tool is 1:2, the time required for machining will be

1.  8 minutes

2.  12 minutes

3.  16 minutes

4.  20 minutes

4

12 minutes

Explanation :
No Explanation available for this question

# The tool of an NC machine has to move along a circular arc from (5, 5) to (10, 10) while performing an operation. The center of the arc is at (10, 5). Which one of the following NC tool path commands performs the above mentioned operation

1.  N010 G02 X10 Y10 X5 Y5 R5

2.  N010 G03 X10 Y10 X5 Y5 R5

3.  N010 G01 X5 Y5 X10 Y10 R5

4.  N010 G02 X5 Y5 X10 Y10 R5

4

N010 G02 X5 Y5 X10 Y10 R5

Explanation :
No Explanation available for this question

# A component can be produced by any of the four processes I, II, III and IV. Process I has a fixed cost of Rs.20 and variable cost of Rs.3 per piece. Process II has a fixed cost of Rs.50 and variable cost of Re.1 per piece. Process III has a fixed cost of Rs.40 and variable cost of Rs.2 per piece. Process IV has a fixed cost of Rs.10 and variable cost of Rs.4 per piece. If the company wishes to produce 100 pieces of the component, from economic point of view it should choose

1.  Process i

2.  Process II

3.  Process III

4.  Process IV

4

Process II

Explanation :
No Explanation available for this question

# A welding operation is time-studied during which a operator was pace-rated as 120%. The operator took, on an average, 8 minutes for producing the weld-joint. If a total of 10% allowances are allowed for this operation, the expected standard production rate of the weld-joint (in units per 8 hour day) is

1.  45

2.  50

3.  55

4.  60

4

45

Explanation :
No Explanation available for this question

1.  25%

2.  50%

3.  75%

4.  100%

4