United Nations Office on Drugs and Crime Interview Questions and Answers

Himalayan tunneling faced challenges like difficult terrain, high altitude, and geological instability.

• Difficult terrain made it hard to access the tunneling site.

• High altitude caused problems like altitude sickness and lack of oxygen.

• Geological instability led to frequent rockfalls and landslides.

• The presence of fault zones and water ingress also posed challenges.

• Construction of access roads and transportation of equipment were also difficult.

• The need to maintain environment...read more

Specifications for railway formation works are determined by RDSO guidelines.

• RDSO guidelines specify the standards for railway formation works such as embankment construction, subgrade preparation, and drainage systems.

• These guidelines cover aspects like materials to be used, compaction requirements, and slope stability.

• For example, RDSO guidelines may specify that the embankment should be constructed using approved materials like granular sub-base and compacted to a certain ...read more

Various tests are conducted on soil and concrete to assess their properties and quality.

• Soil tests include tests for moisture content, density, compaction, pH level, and permeability.

• Concrete tests include tests for compressive strength, slump test, air content, and temperature.

• Soil tests are conducted using methods like Proctor test, hydrometer test, and pH meter.

• Concrete tests are conducted using methods like compression testing machine, slump cone test, and air entrainment...read more

NATM stands for New Austrian Tunneling Method, a technique used in underground construction and tunneling.

• NATM is a tunneling method that originated in Austria in the 1960s.

• It involves excavating the tunnel while providing temporary support using rock bolts, shotcrete, and steel arches.

• The method relies on the inherent strength of the surrounding rock mass for long-term stability.

• NATM allows for flexibility in tunnel design and construction, adapting to geological conditions ...read more

IS codes and specifications are Indian standards that provide guidelines for construction and engineering practices.

• IS codes are developed by the Bureau of Indian Standards (BIS) to ensure quality and safety in various industries.

• These codes cover a wide range of topics such as building materials, construction practices, electrical equipment, and more.

• For example, IS 456:2000 specifies the code of practice for plain and reinforced concrete in structural use.

• Engineers and cons...read more