Tag: science & technology

Quizzes (551) Questions (11015)

Questions Related to science & technology

Multiple choice general knowledge science & technology

A wedge-shaped mass of sediment deposited by a stream into a body of water is called:

  1. an alluvial fan

  2. a submarine fan

  3. a delta

  4. none of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A delta is a wedge-shaped sediment deposit formed where a stream enters a standing body of water (lake or ocean). Alluvial fans (option A) form on land, while submarine fans (option B) form underwater but are not typically wedge-shaped in the same way.

Multiple choice general knowledge science & technology

By definition, a flood is:

  1. an interval of time during which stream discharge exceeds the capacity of the stream channel

  2. an interval of time during which stream velocity increases its discharge

  3. an interval of time during which a stream occupies its flood plain

  4. none of these is an adequate definition of a flood
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A flood is defined as when stream discharge exceeds the channel's capacity, causing water to spill onto floodplains. This is the standard hydrological definition used by geologists and hydrologists.

Multiple choice general knowledge science & technology

In urban areas, floods often become more frequent because:

  1. extensive pavement limits infiltration to soils

  2. extensive pavement increases runoff to streams

  3. storm sewers conduct runoff more efficiently to streams

  4. all of these contribute to increase flooding in urban areas
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Urbanization increases flooding through multiple mechanisms: pavement prevents infiltration (A), increases runoff (B), and storm sewers deliver water faster to streams (C). All these factors combine to make urban floods more frequent and severe.

Multiple choice general knowledge science & technology

A particular stream has a 47-year record of peak discharges available on the Internet. What is the recurrence interval of the 4th-ranked flood in this record?

  1. 12 years

  2. 188 years

  3. 10.75 years

  4. 4 times every 100 years
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The recurrence interval is calculated as (N+1)/M where N is years of record and M is rank. For 47 years and 4th rank: (47+1)/4 = 48/4 = 12 years. This is the standard Weibull plotting formula used in hydrology.

Multiple choice general knowledge science & technology

Methods that have been used to control damage from floods include:

  1. relocating entire communities out of flood plains

  2. construction of dams along streams

  3. construction of levees and flood walls along streams

  4. all of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Multiple flood control methods exist: structural (dams, levees, floodwalls) and non-structural (relocation, zoning). All three options listed are valid flood damage control strategies used in different contexts.

Multiple choice general knowledge science & technology

Base level is:

  1. the level associated with the base of a river channel

  2. the normal elevation of a reservoir

  3. the level above which flood waters will not rise

  4. the level below which streams will not erode
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Base level is the lowest elevation to which a stream can erode - typically sea level or a local reservoir level. Streams cannot erode below this point, making it the fundamental control on valley depth.

Multiple choice general knowledge science & technology

Name the worlds first cloned buffalo calf which was cloned by Karnal's National Dairy Research Institute in India.

  1. Vijayanti

  2. Sampurna

  3. Dolly

  4. Garima
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sampurna was the world's first cloned buffalo calf, created by the National Dairy Research Institute in Karnal, India, in 2009. Dolly was a sheep (the first mammal cloned), while Vijayanti and Garima are not associated with this achievement. This marked a significant milestone in Indian biotechnology and livestock cloning.