Technology problems
- 1. Which motor is NOT suitable for use as a DC machine?
Options- A. Permanent magnet motor
- B. Series motor
- C. Squirrel cage motor
- D. Synchronous motor Discuss
Correct Answer: Squirrel cage motor
Explanation:
The squirrel cage motor is the only one without any connection to the armature.
- 2. The sampling rate, (how many samples per second are stored) for a CD is...?
Options- A. 48.4 kHz
- B. 22,050 Hz
- C. 44.1 kHz
- D. 48 kHz Discuss
Correct Answer: 44.1 kHz
Explanation:
CDs reproduce 44,100 samples per second. Which has a maximum frequency reproduction of 22,050 Hz, or just a hair past the upper limit of human hearing. In this way CDs can theoretically reproduce any frequency in the human hearing range.
- 3. What does the term PLC stand for?
Options- A. Programmable Lift Computer
- B. Program List Control
- C. Programmable Logic Controller
- D. Piezo Lamp Connector Discuss
Correct Answer: Programmable Logic Controller
Explanation:
Used in manufacturing, engineering, and process operations.
- 4. Who built the world's first binary digit computer: Z1...?
Options- A. Konrad Zuse
- B. Ken Thompson
- C. Alan Turing
- D. George Boole Discuss
Correct Answer: Konrad Zuse
- 5. 'OS' computer abbreviation usually means?
Options- A. Order of Significance
- B. Open Software
- C. Operating System
- D. Optical Sensor Discuss
Correct Answer: Operating System
- 6. Who developed Yahoo?
Options- A. Dennis Ritchie & Ken Thompson
- B. David Filo & Jerry Yang
- C. Vint Cerf & Robert Kahn
- D. Steve Case & Jeff Bezos Discuss
Correct Answer: David Filo & Jerry Yang
- 7. In the UK, what type of installation requires a fireman's switch?
Options- A. Neon Lighting
- B. High Pressure Sodium Lighting
- C. Water Features
- D. Hotel Rooms Discuss
Correct Answer: Neon Lighting
Explanation:
Neon lighting runs at a high voltage, typically above 1000 Volts. A fireman's switch protects a fireman from receiving a shock when a water jet is sprayed onto the installation. The switches are red, and mounted in a conspicuous position. (This is specified by IEE Regulations (Europe), SANS (South Africa), UK Electricity regulations and many Asian countries. I am unable to confirm other countries' requirements, so feel free to let me know.)
- 8. The purpose of choke in tube light is?
Options- A. To decrease the current
- B. To increase the current
- C. To decrease the voltage momentarily
- D. To increase the voltage momentarily Discuss
Correct Answer: To increase the voltage momentarily
- 9. '.BAT' extension refers usually to what kind of file?
Options- A. Compressed Archive file
- B. System file
- C. Audio file
- D. Backup file Discuss
Correct Answer: System file
- 10. What do we call a collection of two or more computers that are located within a limited distance of each other and that are connected to each other directly or indirectly?
Options- A. Inernet
- B. Interanet
- C. Local Area Network
- D. Wide Area Network Discuss
Correct Answer: Local Area Network
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