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GUJARAT TECHNOLOGICAL UNIVERSITY
DIPLOMA ENGINEERING – SEMESTER – V-EXAMINATION – WINTER 2015
Subject Code: 3351905 Date: 16/12/2015
Subject Name: Estimating, Costing & Contracting
Time: 10:30 AM TO 1:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make Suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
4. Use of programmable & Communication aids are strictly prohibited.
5. Use of only simple calculator is permitted in Mathematics.
6. English version is authentic.
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Q.1 Answer any seven out of ten. 14
1. Define tendering and list the types of tendering.
2. List the disadvantages of contracting.
3. Explain unit rate method for overhead allocation.
4. List the causes of depreciation.
5. Define forging and list the types of forging.
6. Explain shrinkage allowance for pattern making.
7. Write down the importance of cost analysis.
8. Define budgetary control.
9. Explain breakeven point.
10. Explain variable cost with example.
Q.2 (a) Write down the difference between estimating and costing. 03
OR
(a) Explain Labour contract and Piece rate contrat. 03
(b) Write down the different welding techniques in gas welding. 03
OR
(b) List the elements of cost in arc welding. 03
(c) Find selling price of a steel table if the prime cost 3000 tables is Rs. 1,50,000.Factory overheads are 60% of prime cost, administrative overheads are 40 % of factory cost and selling over heads are 30 % of office cost, and 20 % profit on total cost. 04
OR
(c) A machine was purchased for Rs. 50,000. It was commissioned on 1st Jan 1992. The erection and installation charges are Rs. 5000.This machine was removed on 31st Dec.2012. And its residual value is Rs. 15000. Find Depreciation rate. 04
(d) Two 1 meter long M.S. plate of 1 cm thickness are to be welded by a lap joint with 6mm electrode. Calculate the cost of welding. Consider current used = 250 Amp. , voltage = 30 volts, welding speed = 10 m /hr, electrode used = 0.1 kg/m of welding, labour charges = Rs. 5/hr, power charges = Rs. 10/ kW h , cost of electrode = Rs. 40 / Kg , Efficiency of machine = 60 % 04
OR
(d) A firm produces 1000 pens per day. The material cost is found to be Rs. 1600, the direct labour cost is Rs. 2000 and factory on cost chargeable is Rs. 2500. If the selling on cost is 40% of the factory cost, what must be the price of each pen to release the profit of 14.6% of the selling price. 04
Q.3 (a) Define (1) Shape weight (2) Net weight (3) Gross weight 03
OR
(a) List the various types of forging losses and explain any one. 03
(b) Determine the total cost of 400 pulleys of 1000 cm3 volume .Consider (1) Pattern cost = Rs. 700 (2) Cost of C.I. = Rs. 20/kg (3) Wages of moulder = Rs. 60/day (4) No. of moulds prepared = 25/day/moulder (5) process scrap = 10 % of Net weight (6) Cost of process scrap = Rs. 4/ kg , (7) Melting charges = 20 % material cost (8) Overhead charges = 25 % of material cost
(9) Density of C.I. = 7.8 gm /c.c. find the rate of casting per kg. 07
OR
(b) 100 numbers of rings are to be forged from a soft steel rod of 1 cm diameter. The ring has internal diameter of 8 cm and its outer diameter is 10 cm. If the scale loss is 6% and shear loss 2mm of the length of rod for each ring , find the total material cost if the rod is available at Rs. 3 per meter length. 07
(c) The total sales of an industry is Rs. 2,50,000.The fixed cost of the industry is Rs. 60,000 and variable cost is Rs. 1,25,000.Find the breakeven point for the iindustry. Industy.
OR
(c) Define following terms. (1) Breakeven point (2) Profit – volume ratio (3) Fixed cost (4) Variable cost. 04
Q.4 (a) Explain how will you estimate machine time in case of shaping and planning operation. 03
OR
(a) Define (1) cutting speed (2) depth of cut (3) over run. 03
(b) It is required to produce threads of 2mm pitch in a hole of 20 mm dia. and 20 mm depth by tapping. Taking three cuts and cutting speed of 5m/min for M.S. Estimate the tapping time. 04
OR
(b) A steel rod of 60mm diameter and 120 mm length is to be reduced to 55mm in one cut by turning. Its length is to be reduced to 100 mm. If cutting speed is 25 m/min and feed 0.1mm/revolution, find the time required to finish the job. 04
(c) Write the procedure of estimating cost of power produced by diesel generating set. 07
Q.5 (a) State the limitations of break even chart. 04
(b) List the types of budgets and explain any one in detail. 04
(c)List the modern tools and techniques of cost reduction. 03
(d) Write a short note on E- tendering. 03
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