26 (a) Design a suitable layout for manufacturing a hexagonal bolt and state its advantages ( 5 marks) (Description -1 marks Diagram-3marks, Advantages 2 X 0.5- 1mark) (b) (i) A pump manufacturing company has to assemble bearing on the shaft in large quantities. The time study shows 134 seconds as an observed time for the assembly operation. Determine the standard time with fatigue and personal allowance as 8% and 5%respectively. Level factor for this time study is 0.8. ( Normal time- 1 mark, Allowances 1 mark, Standard time - 1 mark) ( 3 marks) (ii) Differentiate between partial productivity and total productivity ( 2 marks )

(c) Determine the critical path from the following network to build a house.

2 A = E=5 G=15 HT 7 End 1 1 start t . D=12 5 I=9 H=5 B=3 F=2 3 2 A = E=5 G=15 HT 7 End 1 1 start t . D=12 5 I=9 H=5 B=3 F=2 3