In a wire drawing operation, diameter of a steel wire is reduced from 10 mm to 8 mm. the mean flow stress of the material is 400 MPa. The ideal force requied for drawing (ignoring friction and redundant work) is:

1.  4.48 kN

2.   8.97 kN

3.  20.11 kN

4.   31.41 kN

View Answer  
4
Correct Answer :

20.11 kN


Explanation :
No Explanation available for this question

In an arc welding process, the voltage and current are 25 V and 300 A respectively. The arc heat transfer efficiency is 0.85 and welding speed is 8 mm/sec. the net heat input (in J/mm) is:

1.  64

2.  797

3.  1103

4.  79700

View Answer  
4
Correct Answer :

797


Explanation :
No Explanation available for this question

Match the items in columns I and II. Column I Column II (P) Wrinkling (1) Yield point elongation (Q) Orange peel (2) Anisotropy (R) Stretcher strains (3) Large grain size (S) Earing (4) Insufficient blank holding force   (5) Fine grain size   (6) Excessive blank holding force  

1.  P  -    6       Q - 3        R    - 1       S - 2

2.  P  -    4       Q - 5        R    - 6       S-1

3.   P  -    2        Q-5       R-3            S-4

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

View Answer  
4
Correct Answer :

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


Explanation :
No Explanation available for this question

If each abrasive grain is viewed as a cutting tool, then which of the followingrepresents the cutting parameters in common grinding operations

1.  Large negative rake angle, low shear angle and high cutting speed

2.  Large positive rake angle, low shear angle and high cutting speed

3.  Large negative rake angle, high shear angle and low cutting speed

4.  Zero rake angle, high shear angle and high cutting speed

View Answer  
4
Correct Answer :

Large negative rake angle, low shear angle and high cutting speed


Explanation :
No Explanation available for this question

Arrange the processes in the increasing order of their maximum material removal rate. Electrochemical Machining (ECM) Ultrasonic Machining (USM) Electron Beam Machining (EBM) Laser Beam Machining (LBM) and Electric Discharge Machining (EDM)

1.    USM, LBM, EBM, EDM, ECM

2.   EBM, LBM, USM, ECM, EDM

3.  LBM, EBM, USM, ECM, EDM

4.  LBM, EBM, USM, EDM, ECM

View Answer  
4
Correct Answer :

LBM, EBM, USM, EDM, ECM


Explanation :
No Explanation available for this question

The angular speed of PQ in rev/s when the block R attains maximum speed during forward stroke (stroke with slower speed) is

1.  1/3

2.  2/3

3.  2

4.  3

View Answer  
4
Correct Answer :

2/3


Explanation :
No Explanation available for this question

A manufacturing shop processes sheet metal jobs, wherein each job must pass through two machines (M1and M2, in that order). The processing time (in hours) for these jobs is: Machine Jobs P Q R S T U Ml 15 32 8 27 11 16 M2 6 19 13 20 14 7 The optimal make-span (in hours) of the shop is:

1.  120

2.   115

3.   109

4.  79

View Answer  
4
Correct Answer :

109


Explanation :
No Explanation available for this question

Consider the following data for an item. Price quoted by a supplier Order quantity (units) Unit price (Rs.) < 500 10 > 500 9 Annual demand: 2500 units per year Ordering cost: Rs.100 per order Inventory holding rate: 25% of unit price. The optimum order quantity (in units) is:

1.  447

2.  471

3.  500

4.  > 600

View Answer  
4
Correct Answer :

500


Explanation :
No Explanation available for this question

A firm is required to procure three items (P, Q and R). The prices quoted for these items (in Rs.) by suppliers S1, S2 and S3 are given in table. The management policy requires that each item has to be supplied by only one supplier and one supplier supply only one item. The minimum total cost (in Rs.) of procurement to the firm is: Item Suppliers S1 S2 S3 P 110 120 130 Q 115 140 140 R 125 145 165

1.  350

2.  360

3.  385

4.  395

View Answer  
4
Correct Answer :

385


Explanation :
No Explanation available for this question

A stockiest wish to optimize the number of perishable items he needs to stock in any month in his store. The demand distribution for this perishable item is: Demand (in units) 2 3 4 5 Probability 0.10 0.35 0.35 0.20 The stockist pays Rs.70 for each item and he sells each at Rs.90. if the stock is left unsold in any month, he can sell the item at Rs.50 each. There is no penalty for unfulfilled demand. To maximize the expected profit, the optimal stock level is:

1.  5 units

2.  4 units

3.  3 units

4.   2 units

View Answer  
4
Correct Answer :

4 units


Explanation :
No Explanation available for this question
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