Process Planning & Cost Estimation Important Questions – Unit – 2

Process Planning & Cost Estimation Important Questions

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Subject : Process Planning & Cost Estimation

UNIT – 2, Process Selection               Scheme : M

NOTE : 1. The highlighted Questions are asked more than two times in the Board Exam

2. These Questions are collected from Board Examination Question Papers.

2/3 marks Questions

1. What is process selection?
2. State the choice involved in process selection.
3. What is meant by machine capacity?
4. Explain the factors influencing choice of machinery.
5. Mention the factors affecting the process selection.
6. How will you determine the man power required?
7. Define the term selection of material.
8. Explain the method of determination of materials requirement with an example.

10 marks questions

1. Explain in detail the process and equipment selection.
2. A component can be produced either by an automatic lathe or three center lathes. Number of components made per year is 6,000 the cost data for the two machines are given below

	Automatic lathe	Center lathe
Initial investment	Rs 2,00,000	Rs. 50,000
Useful life	8 years	10 years
Motor power	15 HP	3 HP
Labour charges	Rs.20 per hour	Rs. 30 per hour
Time to produce 2000 pieces in each machines	3000 hrs	2900 hrs

For both machines

Interest = 18%

Cost of power = Rs. 1.50 per unit

Taxes and insurance = 8%

Maintenance – annual = 7.5 %

Depreciation = 1% per year

Labour Over head = 25 % on labour

Which machine will you select?

3. Construct suitable operation planning sheets for manufacture of spur gear having 24 teeth using a 2 module gear cutter. The spur gear is to be made for a total quantity of 1000 pieces. The material of the ear is medium carbon steel.
4. A component can be produced on either a turret lathe or an automatic lathe. The different cost factors for the two machines are given below

For turret lathe,

Fixed cost = Rs 400

Variable cost = Rs. 2 per piece

For Automatic lathe,

Fixed Cost = Rs. 1600

Variable cost = Rs. 0.50 per piece

Assume that the cycle time for production is same for both machines, which machine will you select for producing (i) 900 components (ii) 700 components. Also determine the break even quantity.

5. What is process selection? Explain the following in process selection

(i)   Technological choice

(ii) Specific component choice and

(iii)        Process flow choice

6. A semi automatic turret lathe costs Rs. 80,000 and it produces 16 pieces per hour and its operator receive Rs 2 per hour. An engine lathe which cost Rs. 32,000 10 Pieces Per hour and its operator receives Rs. 2.50 per hour. Calculate the minimum number of pieces which makes turret lathe more economical.

7. A component can be produced on either a capstan lathe or an automatic lathe the different cost factor for the two machines are given below

For capstan lathe	Rs.	For Automatic Lathe	Rs.
Fixed Cost	Rs. 400	Fixed Cost	Rs. 1,600
Variable Cost	Rs. 2 per piece	Variable Cost	Rs. 0.50 per piece

Assume that the cycle time for production of the component is same for both machines. Which machine will you select for producing (i) 900 components (ii) 700 components

What is the break even quantity?

8. How will you prepare an operation planning sheet for a given components.

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