World Science and Technology – Exercise – 1

11. Larger buildings may be supplied with a medium voltage electricity supply, and will required a substation or mini-sub. What is the main item of equipment contained in these?

(a) Transformer
(b) Transponder
(c) Transducer
(d) Converter

Answer
Answer : (a)
Explanation
Explanation : The transformer is used to transform a medium voltage supply to a low voltage supply, e.g. from 11 000 V to 400 V. A transformer is rated in kVA, kilo-Volt-Amps, which is a measurement of electrical power. Let us discuss.
Discuss
Discuss : Write your answer. Click here.

12. Which is a type of Electrically-Erasable Programmable Read-Only Memory?

(a) Flash
(b) Flange
(c) Fury
(d) FRAM

Answer
Answer : (a)
Explanation
Explanation : It’s commonly used for MP3 players, computer BIOS code and “thumb” drives. Originally developed in Japan by Toshiba, it has become quite popular for products requiring non-volatile erasable memory. Flash devices have a limited number of erase cycles (typically 10,000 to 1,000,000 cycles) so they’re not as good a choice for applications in which the data changes constantly. However, since it has no moving parts (unlike a hard disk) it is an excellent choice for storing the operating code for small personal electronics like PDAs, cell phones, digital cameras, and the data in items like MP3 players. Let us discuss.
Discuss
Discuss : Write your answer. Click here.

13. What does the term PLC stand for?

(a) Programmable Lift Computer
(b) Program List Control
(c) Programmable Logic Controller
(d) Piezo Lamp Connector

Answer
Answer : (c)
Explanation
Explanation : Used in manufacturing, engineering, and process operations. Let us discuss.
Discuss
Discuss : Write your answer. Click here.

14. What does EPROM stand for?

(a) Electric Programmable Read Only Memory
(b) Erasable Programmable Read Only Memory
(c) Evaluable Philotic Random Optic Memory
(d) Every Person Requires One Mind

Answer
Answer : (b)
Explanation
Explanation : A chip found in alomst every microprocessor Let us discuss.
Discuss
Discuss : Write your answer. Click here.

15. What does VVVF stand for?

(a) Variant Voltage Vile Frequency
(b) Variable Velocity Variable Fun
(c) Very Very Vicious Frequency
(d) Variable Voltage Variable Frequency

Answer
Answer : (d)
Explanation
Explanation : It is a method of controlling the speed of an AC induction motor, whereby speed, current and torque can all be accurately controlled. Let us discuss.
Discuss
Discuss : Write your answer. Click here.

Related Posts

  • World Science and Technology - 255555555552. What is part of a database that holds only one type of information? (a) (b) Field (c) Record (d) File
    Tags: type, file, general, awareness
  • World Science and Technology - 63555555555563. '.BAT' extension refers usually to what kind of file? (a) Compressed Archive file (b) System file (c) Audio file (d) Backup file
    Tags: file, extension, general, awareness
  • World Science and Technology - 50555555555550. '.TMP' extension refers usually to what kind of file? (a) Compressed Archive file (b) Image file (c) Temporary file (d) Audio file
    Tags: file, extension, general, awareness
  • World Science and Technology - 13555555555513. What does the term PLC stand for? (a) Programmable Lift Computer (b) Program List Control (c) Programmable Logic Controller (d) Piezo Lamp Connector
    Tags: programmable, control, computer, stand, general, awareness
  • World Science and Technology - 1685555555555168. A JPG is... (a) A Jumper Programmed Graphic (b) A format for an image file (c) A type of hard disk (d) A unit of measure for memory
    Tags: file, type, memory, general, awareness