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GUJARAT TECHNOLOGICAL UNIVERSITY
Diploma Engineering - SEMESTER–V • Examination – WINTER • 2014
Subject Code: 3351905 Date: 08-12-2014
Subject Name: Estimating Costing and Contracting
Time: 10:30 am - 01:00 pm Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
4. English version is considered to be Authentic.
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Q.1 (a) List methods of overhead allocation .Explain machine hour rate method of overhead allocation. 07
(b) Define Depreciation and Obsolescence .State types of Depreciation in detail. 07
Q.2 (a) Define breakeven point and derive expression for BEP analytically. 07
(b) Calculate selling price of a steel cup board to earn profit of 20%,if prime cost of 3000 cup board is Rs.1,50,000,F.O.H.is 60% of prime cost, office over head cost is 40% of factory cost, selling over head is 30% of office cost. 07
OR
(b) List Arc welding cost elements and procedure of cost estimation in Arc welding processes. 07
Q.3 (a) Four plates each of size 500×250×5 mm are to be gas cut from M.S. plate of size 1000×500×5 mm. Find gas cutting cost for the following data.Oxygen consumption: 5 m3/hr, Acetylene consumption: 2 m3/hr, Cutting speed: 12 m/hr, Cost of oxygen: Rs. 10/m3, Labour cost: Rs. 30/hr, Cost of acetylene: Rs. 25/m3 07
(b) List and explain pattern allowances. 07
OR
Q.3 (a) Estimate the cost of 500 pulleys. Each weigh 8 kg. Use following data.Material cost: Rs.100/kg, Mould prepared per day per moulder: 25, Melting charges: 20 % of material cost, Wages of labour: Rs. 50/day, Ovehead cost: 20 % of material cost. 07
(b) Define following terms which are linked with machining.(1) Cutting speed (2) Feed (3) Depth of cut (4) Approach (5) Over travel 07
Q.4 (a) Define different operations performed on lathe machines and machining time for each operatio n with some figure. 07
(b) Calculate the boring time for a C.I. cylinder to be machined in a single cut which is 300 mm long and 200 mm internal diameter. Cutting speed is 12 m/min, Feed is 0.25 cm/rev, Approach and over travel is 0.5 cm each, Set up time is 0.5 min. 07
OR
Q. 4 (a) Find the weight of 50 m long chain to be made from links of iron rod diameter 1 cm and weigh 6.6 gm/cm. I f the outer dimensions of a link are 10cm and 6 cm. 07
(b) Give definition of contract and its characteristics. 07
Q.5 (a) Give provision of different conditions in contract. 07
(b) Enlist benefits of budget. 07
OR
Q.5 (a) A thermal power plant produces 80MW to satisfy the maximum demand. Load factor of plant is 40 %.Estimate power cost per unit for power produced by this plant. Operating cost is Rs. 1.94/ kWh. Take capital cost per kW is Rs. 1800 and interest and depreciation at 12 %. 07
(b) Write the procedure of estimating cost of power produced by diesel generating set. 07
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