DDA JE Civil case studies
DDA JE Civil · Put your knowledge to work in context.
The DDA Junior Engineer (Civil) recruitment is a direct-recruitment hiring process run by the Delhi Development Authority, an autonomous body under the Ministry of Housing and Urban Affairs that was created in 1957 under the Delhi Development Act "to promote and secure the development of Delhi". The post sits within DDA's engineering wing, whose work spans planning, development and construction of housing projects, commercial land, land management, land disposal and land pooling. The DDA JE Civil case studies are 5 cases and about 2,754 words.
1Cube Results Below Characteristic Strength: Accept or Reject the Slab?
During the 28-day compressive-strength testing of an M25 design-mix concrete lot used for a 150 mm thick slab, twelve 150 mm cubes return the following results in N/mm²: 27.5, 26.8, 28.2, 29.0, 24.6, 26.0, 25.4, 27.2, 23.8, 26.6, 25.9 and 27.8. The contract's acceptance clause states that the mean of any four consecutive test results must be at least fck + 0.825σ, where fck = 25 N/mm² and the established site standard deviation σ is 4.0 N/mm², and that no individual result may fall below fck − 4 N/mm².
573 words, about 3 min2Subgrade Compaction Fails Density but the Contractor Wants More Roller Passes
A 200 mm thick compacted subgrade layer is being laid over a 1,200 m² area of a colony road. The soil is a borrow material with laboratory MDD 1.85 g/cm³ and OMC 16.0%.
555 words, about 3 min3RTI Request, Medical Records and a Pending Criminal Case
An RTI application is received by the DDA's public information officer for a completed road project in a resettlement colony. The applicant seeks: (a) copies of the contractor's running bills and measurement books; (b) the medical records of a worker who was injured at the site; (c) the successful bidder's price bid after the work award; and (d) the names and designations of the officials who inspected the work.
560 words, about 3 min4Scheduling Five Site Inspections Under Conflicting Constraints
Five site inspections-Foundation (F), Brickwork (B), Column (C), Slab (S) and Plumbing (P)-must be completed on five consecutive working days, Monday to Friday, one per day. The following restrictions apply: (i) Foundation must be completed before Column; (ii) Slab must be on the day immediately after Column; (iii) Brickwork cannot be on Monday or Friday; (iv) Plumbing must be after Slab; and (v) Column cannot be on Tuesday.
527 words, about 3 min5Editing a Site Note Before It Enters the Dispute Record
Before a monthly site meeting, a junior engineer drafts the following note to a contractor: 'After inspected the site on 12 March, it was observed that the shuttering of the third-floor slab is not properly supported and some props was missing. The contractor is requested to be rectify the same immediately and the slab concreting may not be allowed until the same is not certified by the Junior Engineer.
539 words, about 3 min