science & technology Online Quiz - 512

Options A, B, and C all describe real obstacles to nuclear energy development (high costs, safety risks, waste disposal). Option D claims nuclear power is clean and cheap - while it has low emissions, 'cheap' is debatable and this statement doesn't describe an OBSTACLE, making it the correct answer to the NOT question.

Dams face a longevity issue primarily due to siltation. Rivers carry sediment which settles in the reservoir (upstream), gradually reducing the volume of water the dam can hold and eventually rendering the power generation ineffective. This is a natural geological process that limits a dam's lifespan.

Graphite primarily forms through regional metamorphism of organic-rich sedimentary rocks, particularly black shales. The high temperatures and pressures of metamorphism transform the carbonaceous material into crystalline graphite. This is the most common geological process for graphite formation.

Fertilizers require essential nutrients: nitrogen, phosphorus (as phosphate), and potassium (potash). Apatite provides phosphate (P), sylvite provides potassium (K). Gypsum is calcium sulfate used in plaster, halite is table salt (NaCl), calcite is in cement, and cassiterite/albite are not fertilizer minerals.

Gypsum (calcium sulfate) is the essential component of plaster of Paris and gypsum wallboard/drywall used in construction. Apatite is phosphate ore, garnet is an abrasive, and talc is used in powder and cosmetics - not construction materials.

Sulfur in coal forms sulfur dioxide (SO2) when burned, which reacts with water in atmosphere to form sulfuric acid - a major component of acid rain. This acidification harms ecosystems by acidifying lakes and soils, damaging forests and aquatic life.

Renewable resources like solar, wind, and hydro can be naturally replenished over relatively short time spans - from days to decades. This distinguishes them from fossil fuels (option D) which require millions of years to form. They are not about to run out (A), nor are they extremely rare (C).

An oil trap is a geologic structure (like an anticline or fault trap) that creates a sealed environment where petroleum accumulates. It's not the impermeable rock itself (A), not an underground lake (B), and not a mechanical device (C) - it's the entire geologic setting that allows accumulation.

Transportation fuel combustion (cars, trucks, planes, ships) is indeed responsible for nearly half of air pollution globally. While factories (B) and heating (C) contribute, the transportation sector is the largest single source. 'None of the above' is incorrect because A is accurate.

Tar sands (oil sands) are mixtures of clay, sand, water, and bitumen - a heavy, viscous form of petroleum. They are NOT cheap or easily recoverable (A) - extraction is energy-intensive and environmentally damaging. They're not simple sand-petroleum layers (C) nor found everywhere at 4000 feet (D).

According to historical DOE data, U.S. renewable energy consumption actually decreased between 1997 and 2001, contrary to what might be expected. This was due to various factors including policy changes and market conditions. This question requires specific knowledge of that time period.

Diamonds are mined most often from igneous rocks, specifically from kimberlite pipes - vertical volcanic structures that bring diamonds from deep within the Earth to the surface. Coal forms from sedimentary rocks, bauxite is weathered soil, and gold occurs in various rock types but is most famously associated with quartz veins.

A retrovirus is specifically designed to attack antivirus programs by infecting and disabling them. Unlike worms or trojans, retroviruses target security software to avoid detection. This is a specialized malware category.

Novell created NetWare, the dominant networking software in the 1980s for LANs. Microsoft networking became popular later. Sun focused on UNIX workstations. IBM had networking but NetWare was the most used.

Interleave is a memory/disk term, not a programming concept. Subroutines, compile, and null pointers are core programming concepts. Interleaving refers to arranging data in non-contiguous patterns.

Windows XP's name officially stands for 'eXPerience' - representing the enhanced user experience. Whistler was the codename during development. It was not an acronym for Extra Powerful.

Windows 9x registry consisted of two files: user.dat (user settings) and system.dat (system settings). Autoexec.bat and config.sys are DOS files. Win.ini is a legacy Windows 3.x file.

The Pentium FDIV bug (1994) was a floating point unit (FPU) flaw causing division errors. It specifically affected the FPU, not cache, socket, or other components. Intel eventually recalled affected chips.

MIME stands for Multipurpose Internet Mail Extensions, a standard that extends email format to support non-ASCII characters, attachments, and multi-part messages. The 'M' represents Multipurpose, not Mail as the distractors suggest. MIME is foundational to modern email functionality.

The Jerusalem virus (also called Friday the 13th virus) was a DOS virus first detected in 1987 that infected both .EXE and .COM files. On every Friday the 13th, it would delete any programs executed on that day. Chernobyl (CIH) targeted BIOS firmware, while Melissa and I Love You were email-based worms from the late 1990s.