(SEM V)THEORY EXAMINATION 2022-23 QUANTITY ESTIMATION AND CONSTRUCTION MANAGEMENT

SECTION A (2 × 10 = 20 Marks)

Attempt all questions in brief

(a) Schedule of Rates
A schedule of rates is a detailed document published by government or authorized departments that lists the standard rates of materials, labour, and equipment used in construction work. It helps engineers prepare estimates uniformly and ensures transparency in costing public works.

(b) Long wall estimates
Long wall estimates are prepared when the length of walls is much greater than their thickness. In this method, the length of the wall is taken as out-to-out length, while the breadth and depth vary depending on the item of work.

(c) Centre line method
The centre line method is a quantity estimation technique in which the total length of the centre line of walls is calculated and used for computing quantities. This method is suitable for symmetrical buildings and saves time compared to the long wall–short wall method.

(d) Types of specification
Specifications describe the quality of materials and workmanship required for a construction project. They are broadly classified into general specifications and detailed specifications. General specifications provide an overview, while detailed specifications give complete information item-wise.

(e) Requirements of rate analysis
Rate analysis is required to determine the cost of an item of work by considering materials, labour, equipment, overheads, and profit. It helps in preparing estimates, checking contractor bills, and fixing fair rates for new items.

(f) Project life cycle with example
The project life cycle includes stages such as planning, design, execution, monitoring, and closure. For example, in a building project, planning involves feasibility studies, design includes drawings, execution covers construction, and closure includes handover.

(g) Operational cost of equipment
Operational costs include fuel, lubricants, wages of operators, maintenance, repairs, and depreciation. These costs are incurred while the equipment is in use at the construction site.

(h) Hoisting equipment
Hoisting equipment is used for lifting materials vertically. Common examples include cranes and hoists, which are widely used in high-rise construction.

(i) Importance of direct cost
Direct cost is important because it represents the actual cost of construction activities such as materials, labour, and equipment. Accurate calculation of direct cost ensures proper budgeting and profitability of a project.

(j) Reasons for time value of money
The time value of money exists because money available today can be invested to earn interest, inflation reduces purchasing power over time, and future cash flows involve uncertainty and risk.

SECTION B (10 × 3 = 30 Marks)

(a) General rules for measurement of works
Measurement of works is carried out according to standard rules such as those prescribed in IS codes. All dimensions are measured in metres, areas in square metres, and volumes in cubic metres. Measurements should be accurate, complete, and taken net excluding waste unless specified.

(b) Rate analysis of excavation in foundation
Rate analysis of excavation includes cost of labour for digging, lifting soil up to 1.5 m, lead up to 30 m, filling, watering, ramming, and disposal of surplus earth. It also accounts for tools, overheads, and contractor’s profit.

(c) Work breakdown structure and milestone chart
A work breakdown structure divides a project into smaller manageable components. A milestone chart shows major events or stages of the project along a time scale, helping in monitoring progress and completion deadlines.

(d) Conveying equipment
Conveying equipment is used to transport materials horizontally or vertically at construction sites. Examples include belt conveyors, bucket elevators, and screw conveyors, which increase efficiency and reduce manual handling.

(e) Depreciation vs obsolescence and break-even chart
Depreciation is the reduction in value of equipment due to wear and tear over time, while obsolescence occurs due to technological advancement. A break-even chart helps determine the point at which total cost equals total revenue and aids in decision-making.

SECTION C

Q3 (a) Classification of scheduling and PERT time calculation

Scheduling is classified into bar charts, milestone charts, CPM, and PERT. In PERT, the earliest expected time is calculated by forward pass, while the latest allowable time is calculated by backward pass. These help identify critical activities and project duration.

Q4 (b) Estimation of brickwork and plastering

For a wall of given dimensions, quantities of brickwork are calculated in cubic metres, while plastering is calculated in square metres. The total cost is obtained by multiplying quantities with respective rates, ensuring accurate cost estimation.

Q5 (b) Muster roll and labour safety

A muster roll is a register used to record attendance and wages of labourers. Proper preparation ensures transparency, prevents fraud, and promotes labour safety by maintaining work hours and compliance with labour laws.

Q6 (b) Earthwork equipment and special usage

Earthwork equipment includes excavators, bulldozers, scrapers, and loaders. Each equipment has a specific purpose, such as excavation, pushing soil, leveling ground, and loading materials, improving productivity in construction projects.

Q7 (a) Direct and indirect cost comparison

Direct costs are directly associated with construction activities, such as materials and labour, whereas indirect costs include administrative expenses, supervision, and utilities. Both costs are essential for accurate project budgeting.