58 Questions
What is included in the rate for excavation?
Cost of all tools, plants, explosives, shoring, dewatering, and labor
Who is responsible for measuring and recording the site levels?
The Engineer-in-charge and the contractor jointly
What is the purpose of anti-termite treatment?
To provide a chemical barrier against sub-terrain termites
What is the scope of pre-constructional anti-termite treatment?
Soil treatment with approved chemicals in water emulsion in foundation trenches, plinth beams, plinth filling, etc.
What is the preferred membership for the specialized agency for anti-termite treatment?
Indian Pest Control Association
What is the standard to be followed for anti-termite treatment?
IS 6313 (part II) 1981
When should the pre-constructional anti-termite treatment be applied?
During the construction stages of the sub-structure up to plinth level
What is included in the quantity of excavation?
The necessary additional quantity of excavation involved beyond the plan dimensions
Who decides on the method of measurement for excavation?
The Engineer-in-charge
What is the unit of measurement for the consolidated filling?
Cubic meters up to two places of decimal
What is the primary purpose of removing trees, stumps, logs, or roots from the building site during site preparation?
To assist with the uniform distribution of the chemical emulsion
Why is it necessary to moisten the soil before applying the chemical emulsion in sandy or porous soil?
To prevent piping or excessive percolation of the emulsion
What is the purpose of scarifying the soil surface to a depth of 75mm in clay or heavy soils?
To facilitate the penetration of the chemical emulsion
What is the recommended rate of application of the chemical emulsion in foundation trenches?
5 litres/sqm of horizontal surface area
Why is it necessary to treat the sides of the foundation trenches?
To ensure continuity of the chemical barrier
What is the purpose of making holes at 150mm centers on the surface of the filled earth within plinth walls?
To facilitate the penetration of the chemical emulsion
Why is it necessary to establish continuity of the vertical chemical barrier on inner wall surfaces?
To ensure the effectiveness of the chemical emulsion
What is the recommended rate of application of the chemical emulsion on top surfaces of plinth filling?
5 litres/sqm of surface area
Why is it necessary to make a small channel at the junction of walls and floors?
To establish continuity of the vertical chemical barrier
What is the purpose of rodding the earth at 150mm centers close to the wall surface?
To facilitate the penetration of the chemical emulsion
What is the depth up to which excavation is included in the item of earthwork for various kinds of soil?
1.5m
How is the extra lift measured?
In units of 1.5m or part thereof
What is the depth beyond which excavation is measured net?
30cm
How are the dimensions for the purpose of payment reckoned?
On the horizontal area of the excavations at the base
What is the reduction percentage considered for voids in rock excavation?
40%
What is the reduction percentage considered for soil excavation?
20%
What is the method of measurement for excavation in areas having depths less than 30cm?
Surface measurement on square meter basis
Under what condition is the excavation for side slopes paid for?
Never
What is the primary purpose of treating the soil beneath the expansion joints?
To ensure the continuity of the chemical barrier
What should be done if the treated soil barriers are disturbed?
Take immediate steps to restore the continuity and completeness of the barrier system
What is the most likely source of accidental poisoning when handling chemicals?
Absorption through the skin
What should be done in case of severe contamination with chemicals?
All of the above
What is the duration of the guarantee provided by the contractor?
10 years
What is the basis of payment for the treatment?
Plinth area measurements at ground floor
What type of stones are preferred for rubble stone soling?
Black trap or granite
What should be done to prevent skin contact with concentrates?
Wear gloves and protective clothing
Why should flames be avoided during mixing of chemicals?
To prevent fire hazards
What should be done to ensure the continuity of the chemical barrier?
Treat the soil right up to the bottom of the vertical wall / column surfaces
What is the primary requirement for the surface before laying rubble soling?
Clearing of loose materials and leveling
How should the stones be laid in rubble soling?
With their bases of the largest area resting on the sub-grade
What is the minimum tolerance allowed for the specified thickness of soling?
25mm
What should be used to fill the interstices between the stones in rubble soling?
Quarry spoils or stone chips of larger size possible
What is the purpose of watering and consolidating the rubble soling?
To compact the surface and achieve a dense sub-base
How should the rate for rubble soling be quoted?
Per square metre of the soling of specified thickness
What does the scope of reinforced concrete and allied works include?
General requirements for concrete jobs, including requirements for quantity, handling, storage, proportioning, batching, mixing, and testing of concrete
What is the requirement for the design mix of concrete in foundation and plinth?
The contractor can use equivalent nominal mix against the specified design mix concrete
What is the right of the Engineer-in-charge in regards to concrete work?
To inspect the sources of materials, the layout and operation of procurement and storage of materials, the concrete batching and mixing equipments, and the quality control system
What should be the quality of materials and method of manufacture for concrete work?
Should conform to the applicable portions of the specifications
What is the primary requirement for the arrangement of concrete inspection?
Obtaining approval from the Engineer-in-charge prior to starting the concrete work
What is the minimum grade of ordinary Portland cement (OPC) required for the concrete work?
43 grade
What is the maximum number of cement bags that can be stacked in a tier?
12 bags
Who is responsible for making arrangements for the storage of adequate quantity of cement?
The contractor
What is the purpose of maintaining a joint account of cement consumed at the site?
To ensure effective control on the quality of cement used
What is the minimum duration for which cement can be held in store before it needs to be retested?
90 days
What is the purpose of the certified report from the cement manufacturer's chemist?
To attest to the conformity of the cement to IS specifications
What is the definition of 'Fine Aggregate' in the context of concrete manufacture?
Aggregate most of which passes through 4.75 mm I.S. sieve
Who is responsible for establishing cement/concrete/soil testing laboratories at the site of work?
The contractor
What is the purpose of testing the cement at a National Test Laboratory/Departmental Laboratory or approved laboratory?
To determine if the cement is defective
Study Notes
Measurement of Lift and Excavation
- Lift is measured from ground level
- Excavation up to 1.5m depth below ground level is included in the item of earthwork
- Extra lift is measured in units of 1.5m or part thereof
- Obvious lift is not measured, except for leads up to 250m
- Excavation is measured in successive stages of 1.5m, stating the commencing level
- Mode of Measurement: net dimensions of excavation are considered, excluding depths less than 30cm
- Horizontal area of excavation at the base is used for payment calculations
- Reasonable working space for waterproofing and shuttering is allowed and considered for payment
Antitermite Treatment
- Pre-constructional anti-termite treatment is a process of applying soil treatment to a building in its early stages of construction
- The treatment provides a chemical barrier against sub-terrain termites
- The treatment should be carried out by specialized agencies with sufficient experience
- The scope of treatment includes soil treatment with approved chemicals in water emulsion
- The treatment is applied in stages, including foundation trenches, plinth beams, and expansion joints
- Site preparation involves removing debris, leveling, and compacting the soil
- Chemicals used include those approved by the Engineer-in-charge
- Precautions are taken to ensure health and safety, including wearing protective clothing and avoiding contact with chemicals
Guarantee
- The contractor is required to furnish a guarantee for 10 years from the date of completion of work
- The guarantee ensures that the contractor will carry out necessary post-constructional treatment to keep the area free from termites
Measurement of Antitermite Treatment
- Payment is made based on plinth area measurements at ground floor level
- The rate includes the cost of materials, labor, and all tools required for complete operation
Hard Core / Soling under Floors/Foundations
- The scope of work includes soling work using bricks or rubble stones laid under floors/foundations
- The rubble stone should be of best variety, hard, durable, and free from defects
- Preparation of the surface involves clearing, leveling, watering, and compacting the bed
- Workmanship involves setting the stones closely, packing, and filling interstices with quarry spoils or stone chips
- The entire surface is examined for protrusions and filled with approved murrum
Measurement of Hard Core/Soling
- The quoted rate is per square meter of the soling of specified thickness
- Linear dimensions are measured up to two places of decimals of a meter
- Plan areas of soling work actually done are measured for payment
Reinforced Concrete and Allied Works
- The scope of work includes general requirements for concrete jobs, including on-site production facilities
- The quality of materials and method of control of manufacture and transportation of all concrete work conform to applicable portions of the specifications
- Cement concrete (plain and reinforced) is used in foundation and plinth
- Materials used include standard type Portland cement, clean sand, natural coarse aggregate, clean water, ice, and admixtures
- The Engineer-in-charge has the right to inspect the sources of materials, layout, and operation of procurement and storage of materials
- Cement used should be ordinary Portland cement (OPC) 43 grade manufactured as per IS specifications
- Joint account of cement consumed at the site is maintained for verification### Cement Storage and Handling
- Maximum 12 bags shall be stacked in any tier.
- Storage arrangement must be approved by the Engineer-in-charge.
- Cement consignments shall be stored as received and consumed in the order of their delivery.
- Each consignment of cement shall be accompanied by a test certificate from the company indicating lot No, etc.
- Samples shall be taken for each lot and sent to a Standard Approved Material Testing Laboratory for physical and chemical analysis.
- The cost of testing shall be borne by the Contractor.
- Cement held in store for 90 days or longer shall be retested before use in work.
Testing and Approval of Defective Cement
- If the Engineer-in-charge suspects defective cement, it shall be tested immediately at a National Test Laboratory or Departmental Laboratory.
- Test results must be satisfactory before the cement can be used in work.
Aggregates
- Aggregate refers to both fine and coarse inert materials used in concrete manufacture.
- Fine Aggregate: aggregate that passes through 4.75 mm I.S. sieve.
- Coarse Aggregate: aggregate that is retained on 4.75 mm I.S. sieve.
- All proposed aggregates shall be subject to the Engineer-in-charge's approval.
- Source of supply shall not be changed without prior approval of the Engineer-in-charge.
- Aggregates shall consist of natural sand, crushed stone, and gravel from a known satisfactory source.
- Aggregates shall be chemically inert, strong, hard, durable, and free from deleterious materials.
Sampling and Testing of Aggregates
- Sampling of aggregates for mix design and suitability shall be taken under the Engineer-in-charge's supervision.
- Samples shall be delivered to the laboratory for testing.
This quiz covers the rules and procedures for measuring lift in earthwork excavation, including the calculation of extra lift and the measurement of excavation in successive stages.
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