Tag: science & technology

Quizzes (551) Questions (11015)

Questions Related to science & technology

Multiple choice general knowledge science & technology

What is a bearing pressure in a journal bearing (width 30 mm and Dia 20 mm) subjected to shaft load of 40N.

  1. 40x 20 x 30

  2. 40/(20x30)

  3. 40/(3.14 x 20 x 20/4)

  4. 40 x (3.14 x 20 x 20/4)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Bearing pressure is calculated as load divided by projected bearing area. For a journal bearing, the projected area is diameter times width (not the circular cross-sectional area). So pressure = 40N/(20mm × 30mm) = 40/(20×30) N/mm².

Multiple choice general knowledge science & technology

Which of the following is not a social network site?

  1. Amazon

  2. Myspace

  3. Orkut

  4. Twitter
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Amazon is an e-commerce platform, not a social networking site. Myspace, Orkut, and Twitter are all social networks where users primarily connect and share content with others. The question asks to identify the exception - Amazon's core purpose is retail transactions, not social interaction.

Multiple choice general knowledge science & technology

Who was one of the original founders for the Intel corporation?

  1. Bill Gates

  2. Jerry Yang

  3. Gordon E. Moore

  4. Sergey Brin
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Gordon E. Moore was indeed one of the original founders of Intel Corporation in 1968, along with Robert Noyce. He is famous for 'Moore's Law' which predicted the exponential growth of transistor density. The other options are founders of other major tech companies: Gates (Microsoft), Yang (Yahoo), and Brin (Google).

Multiple choice general knowledge science & technology

Which of the below options is a type of connector used with a CD-ROM or other disc drive?

  1. DB-15

  2. Molex

  3. PS/2

  4. RJ-11
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Molex connectors are the standard 4-pin power connectors used to supply power to CD-ROM drives, DVD drives, and other internal drives in computers. DB-15 is for video/game ports, PS/2 is for keyboard/mouse, and RJ-11 is for telephone connections. Molex connectors provide the 12V and 5V power rails that optical drives require.

Multiple choice general knowledge science & technology

Where are the device drivers settings for Windows stored?

  1. BIOS

  2. CMOS

  3. EEPROM

  4. Registry
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Windows stores device driver settings and most system configuration in the Registry, a hierarchical database. BIOS contains firmware settings, CMOS stores BIOS/UEFI configuration data, and EEPROM is a type of memory chip. The Registry holds hardware profiles, driver parameters, and system settings that Windows uses to load and configure drivers at boot.

Multiple choice general knowledge science & technology

Which of the below power line issues can cause problems with your computer?

  1. Line sag

  2. Line surge

  3. Line noise

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

All three power line issues can damage computers. Line sag (undervoltage) can cause system instability and data corruption, line surge (overvoltage/spikes) can fry components, and line noise (EMI/RFI) introduces signal errors that corrupt data transfer. Power protection devices like UPS and surge protectors mitigate these problems.

Multiple choice general knowledge science & technology
  1. If a 20 teeth gear is meshes with 40 teeth gear then which is a weaker gear in bending if both the gears are made up of same material

  1. both weaker

  2. 20 teeth

  3. 40 teeth

  4. Any one depending on load
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In gear mechanics, the gear with fewer teeth has smaller individual teeth that are weaker in bending strength. Since both gears are made of the same material, the 20-tooth gear has smaller, weaker teeth compared to the 40-tooth gear. The 40-tooth gear has more teeth distributing the load, making it stronger. Load distribution depends on tooth size and number.

Multiple choice general knowledge science & technology

We know c = sin(n1/n2) where c = critical angle . Also total internal reflection occurs when angle of incidence ( i ) is greater than c. Based on this context what is n1 .

  1. refractive index of the less optically dense medium,

  2. refractive index of the more optically dense medium,

  3. refractive index of vacuum

  4. angle between incident ray and normal
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In the formula for the critical angle, n1 represents the refractive index of the less dense medium (usually air) and n2 represents the more dense medium. Total internal reflection occurs when light travels from n2 to n1.