BE/B Eng Bachelor of Engineering Bachelor of Civil Engineering 5

Question 1

In wastewater treatment, the Biochemical Oxygen Demand (BOD) test measures:

Accepted Answer

The oxygen consumed by microorganisms decomposing organic matter over 5 days at 20°C

Answer

BOD5 quantifies the amount of dissolved oxygen consumed by biological degradation of organic pollutants at 20°C over five days.

Question 2

The effective length factor (K) for a column with both ends pinned is:

Accepted Answer

1.0

Answer

A pin-pin column buckles in a half-sine wave with an effective length equal to its actual length, giving K = 1.0.

Question 3

Which method is used to determine the California Bearing Ratio (CBR) of a subgrade soil?

Accepted Answer

A penetration test comparing resistance to that of crushed limestone

Answer

CBR is determined by measuring the load required to penetrate a soil sample at specified rates compared to standard crushed limestone values.

Question 4

In open-channel hydraulics, critical flow occurs when the Froude number (Fr) equals:

Accepted Answer

1.0

Answer

Critical flow is defined by Fr = V/√(gD) = 1, where inertial and gravitational forces are equal and specific energy is minimized for a given discharge.

Question 5

The primary advantage of using fiber-reinforced polymer (FRP) composites in civil structures is:

Accepted Answer

High strength-to-weight ratio and corrosion resistance

Answer

FRP composites offer very high tensile strength at low weight and are immune to corrosion, making them ideal for harsh environments.

BE/B Eng Bachelor of Engineering Practice Test

BE/B Eng Bachelor of Engineering Practice Test

BE/B Eng Bachelor of Engineering Bachelor of Civil Engineering 5