Construction Estimating
Requirements of Estimation and Costing
- Procedure of estimating or method of estimating
- Data required to prepare an estimate
- Drawings
- Specifications
- Rates
- Complete estimate
- Lump sum
- Work charged establishment
Solved Example: 9063-01
In the construction industry, contractor's profit is included in: (SSC JE CE Oct 2020 Evening)
A. Unit rate of items
B. Specifications
C. Work charged establishments
D. Contingencies
Correct Answer: A
Methods of Taking Out Quantities
- Long wall-short wall method
- Centre line method
- Partly centre line and partly cross wall method
- Detailed estimate
- Factors to be considered while preparing detailed estimate
- Data
- Fixing of rate per unit of an item
- Methods of preparation of approximate estimate
- Plinth area method
- Cubical contents method
Solved Example: 9062-01
What is the quantity of cement (in kg) and of dry sand (in cubic meter) respectively required for preparing 1 cubic meter of wet cement mortar of 1 : 5 proportion? (UPCL AE Civil 2021)
A. 270 and 1.00
B. 290 and 1.04
C. 290 and 1.00
D. 312 and 1.04
Correct Answer: D
Solved Example: 9062-02
A room is 4 m $\times$ 3 m with 20 cm walls all around. The estimate of walls by central line method will be: (UPPCL JE CE Paper I 2014)
A. 12 m
B. 14.8 m
C. 15.6 m
D. 14 m
Correct Answer: B
Solved Example: 9062-03
The carpet area of a residential building is generally ____________ of its plinth area. (SSC JE CE Oct 2020 Morning)
A. 80 % - 95 %
B. 50 % - 65 %
C. 65 % - 80 %
D. 35 % - 50 %
Correct Answer: B
Solved Example: 9062-04
In which type of estimate is 'Court yard' NOT considered? (SSC JE CE Mar 2021 Morning)
A. Cube rate estimate
B. Plinth area estimate
C. Unit rate estimate
D. Lump sum estimate
Correct Answer: B
Solved Example: 9062-05
Carpet area means: (ISRO Draughtsman-B Civil 2016)
A. Plinth area minus area occupied by wall
B. Total floor area minus circulation area
C. Area above plinth level
D. Plot area of the site
Correct Answer: B
Solved Example: 9062-06
Estimate the quantity of brick masonry required for construction of a room of 4 m $\times$ 3 m internal dimensions. Thickness of wall should be 250 mm. Two windows of 2 m $\times$ 1.5 m and one door of 1.5 m $\times$ 2.2 m is to be provided to the room. Height between top of plinth beam and bottom of slab beam should be 4 m. (SSC JE CE Oct 2020 Morning)
A. 13.918 m$^3$
B. 9.420 m$^3$
C. 15.935 m$^3$
D. 12.675 m$^3$
Correct Answer: D
Solved Example: 9062-07
Determine the approximate proportion of dry cement mortar required for brick work with bricks of nominal size 19 cm x 9 cm x 9 cm, with 18 % extra for frog filling and wastage is : (assume 1 m$^3$ of wet mortar = 1.3 m$^3$ of dry mortar) (CIL MT Civil 2020)
A. 41%
B. 35.3%
C. 26.7%
D. 32.5%
Correct Answer: B