General Knowledge

Science and Technology Section 1

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Science and Technology Section 1

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Question 31
Which consists of two plates separated by a dielectric and can store a charge?

A
Inductor
B
Capacitor
C
Transistor
D
Relay
Correct Answer: Option B

Useful in tuning and filtering circuits, it blocks DC while passing AC. How much charge a capacitor can store is its capacitance, measured in farads.nn

Question 32
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?

A
Inernet
B
Interanet
C
Local Area Network
D
Wide Area Network
Correct Answer: Option C

No answer description available for this question.

Question 33
Sometimes computers and cache registers in a foodmart are connected to a UPS system. What does UPS mean?

A
United Parcel Service
B
Uniform Product Support
C
Under Paneling Storage
D
Uninterruptable Power Supply
Correct Answer: Option D

An uninterruptable power supply (UPS) is a backup power supply, such as a battery, that provides emergency power in the event that power is lost from the main supply.

Question 34
Who co-founded Hotmail in 1996 and then sold the company to Microsoft?

A
Shawn Fanning
B
Ada Byron Lovelace
C
Sabeer Bhatia
D
Ray Tomlinson
Correct Answer: Option C

No answer description available for this question.

Question 35
'.TMP' extension refers usually to what kind of file?

A
Compressed Archive file
B
Image file
C
Temporary file
D
Audio file
Correct Answer: Option C

No answer description available for this question.

Question 36
In the UK, what type of installation requires a fireman's switch?

A
Neon Lighting
B
High Pressure Sodium Lighting
C
Water Features
D
Hotel Rooms
Correct Answer: Option A

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.)

Question 37
The electromagnetic coils on the neck of the picture tube or tubes which pull the electron beam from side to side and up and down are called a...?

A
Transformer
B
Yoke
C
Capacitor
D
Diode
Correct Answer: Option B

Twisting the yoke will tilt the picture. A projection color television uses three picture tubes and yokes for red, green and blue light.

Question 38
'.JPG' extension refers usually to what kind of file?

A
System file
B
Animation/movie file
C
MS Encarta document
D
Image file
Correct Answer: Option D

No answer description available for this question.

Question 39
What does AM mean?

A
Angelo marconi
B
Anno median
C
Amplitude modulation
D
Amperes
Correct Answer: Option C

Amplitude modulation was the first type to be used in radio. It works well with HF and morse code.

Question 40
In what year was the "@" chosen for its use in e-mail addresses?

A
1976
B
1972
C
1980
D
1984
Correct Answer: Option B

No answer description available for this question.

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