ME or MEng Master of Engineering Environmental and Systems Engineering

Question 1

Life Cycle Assessment (LCA) in environmental engineering evaluates:

Accepted Answer

Environmental impacts from raw material extraction through end-of-life disposal

Answer

Cost over the operational life of a product only

Answer

Structural integrity under cyclic loading over a product's lifespan

Answer

Safety inspection intervals for mechanical systems

Question 2

In systems engineering, a system's reliability R(t) is related to its hazard (failure) rate λ(t) by:

Accepted Answer

R(t) = e^(−∫λ(t)dt)

Answer

R(t) = λ(t) × t

Answer

R(t) = 1 / λ(t)

Answer

R(t) = λ(t)² / 2

Question 3

The Biological Oxygen Demand (BOD) test measures:

Accepted Answer

Oxygen consumed by microorganisms to decompose organic matter in water

Answer

Dissolved oxygen concentration in clean water

Answer

Photosynthetic oxygen production in aquatic systems

Answer

Chemical oxygen demand for inorganic oxidation only

Question 4

A fault tree analysis (FTA) is a top-down method used to:

Accepted Answer

Identify combinations of events leading to a specified top-level failure

Answer

Improve manufacturing throughput sequentially

Answer

Map customer requirements to engineering specifications

Answer

Optimize supply chain network flows

Question 5

Total Dissolved Solids (TDS) in water quality refers to:

Accepted Answer

Inorganic salts, minerals, and organic matter dissolved in water

Answer

Suspended particulate matter larger than 0.45 μm

Answer

Biological oxygen demand in parts per million

Answer

Hardness due to calcium and magnesium only

Question 6

In a FMEA (Failure Mode and Effects Analysis), the Risk Priority Number (RPN) is calculated as:

Accepted Answer

Severity × Occurrence × Detection

Answer

Severity + Occurrence + Detection

Answer

Severity × Occurrence / Detection

Answer

(Severity + Occurrence) × Detection