Technology KBC Quiz & KBC Questions, Multiple Choice Questions and Answers

Question: What frequency range is the High Frequency band?

1. 100 kHz
   
2. 1 GHz
   
3. 30 to 300 MHz
   
4. 3 to 30 MHz
   

Incorrect Answer

Correct Answer
The HF band is based on frequencies 3 to 30 Mhz. AM radio stations are in the HF band but normally are stated in kilohertz.

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Question: What does EPROM stand for?

1. Electric Programmable Read Only Memory
   
2. Erasable Programmable Read Only Memory
   
3. Evaluable Philotic Random Optic Memory
   
4. Every Person Requires One Mind
   

Incorrect Answer

Correct Answer
A chip found in alomst every microprocessor...

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Question: What does the term PLC stand for?

1. Programmable Lift Computer
   
2. Program List Control
   
3. Programmable Logic Controller
   
4. Piezo Lamp Connector
   

Incorrect Answer

Correct Answer
Used in manufacturing, engineering, and process operations.

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Question: Which motor is NOT suitable for use as a DC machine?

1. Permanent magnet motor
   
2. Series motor
   
3. Squirrel cage motor
   
4. Synchronous motor
   

Incorrect Answer

Correct Answer
The squirrel cage motor is the only one without any connection to the armature.

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Question: What does VVVF stand for?

1. Variant Voltage Vile Frequency
   
2. Variable Velocity Variable Fun
   
3. Very Very Vicious Frequency
   
4. Variable Voltage Variable Frequency
   

Incorrect Answer

Correct Answer
It is a method of controlling the speed of an AC induction motor, whereby speed, current and torque can all be accurately controlled.

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Question: The sampling rate, (how many samples per second are stored) for a CD is...?

1. 48.4 kHz
   
2. 22,050 Hz
   
3. 44.1 kHz
   
4. 48 kHz
   

Incorrect Answer

Correct Answer
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.

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Question: Compact discs, (according to the original CD specifications) hold how many minutes of music?

1. 74 mins
   
2. 56 mins
   
3. 60 mins
   
4. 90 mins
   

Incorrect Answer

Correct Answer
According to many stories surrounding the origin of the compact disc, 74 minutes was settled on because it would comfortably contain all of Beethoven's 9th symphony on one disc. Although some stories reference a specific Sony higher-up who claimed this as his favorite piece of music, stories differ. All that's known for sure is that Sony insisted on this and won out over Phillips' original 60 minute proposal.

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

1. United Parcel Service
   
2. Uniform Product Support
   
3. Under Paneling Storage
   
4. Uninterruptable Power Supply
   

Incorrect Answer

Correct Answer
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.

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Question: What does AC and DC stand for in the electrical field?

1. Alternating Current and Direct Current
   
2. A Rock Band from Australia
   
3. Average Current and Discharged Capacitor
   
4. Atlantic City and District of Columbia
   

Incorrect Answer

Correct Answer
Electricity is voltage and current. Voltage is electrical pressure, and current is the flow of charged particles. The difference between alternating current (AC) and direct current (DC) is that the electrons in an AC circuit regularly reverse their direction. In a DC circuit electrons always flow in the same direction.

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

1. Inductor
   
2. Capacitor
   
3. Transistor
   
4. Relay
   

Incorrect Answer

Correct Answer
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.

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