Science and Technology Objective Questions and Answers - Set 03

GK Practice Test: Question Set - 03


1. 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

2. In a color television set using a picture tube a high voltage is used to accelerate electron beams to light the screen. That voltage is about?
    (A) 500 volts
    (B) 5 thousand volts
    (C) 25 thousand volts
    (D) 100 thousand volts

3. The transformer that develops the high voltage in a home television is commonly called a _________?
    (A) Tesla coil
    (B) Fly-back
    (C) Yoke
    (D) Van de Graaf

4. Which consists of two plates separated by a dielectric and can store a charge?
    (A) Inductor
    (B) Capacitor
    (C) Transistor
    (D) Relay

5. "FET" is a type of transistor; Its full name is ________ Effect Transistor.
    (A) Field
    (B) Factor
    (C) Flash
    (D) Force

6. What are three types of lasers?
    (A) Gas, metal vapor, rock
    (B) Pointer, diode, CD
    (C) Diode, inverted, pointer
    (D) Gas, solid state, diode

7. What will a UPS be used for in a building?
    (A) To provide power to essential equipment
    (B) To monitor building electricity use
    (C) To carry messages between departments
    (D) To control lighting and power systems

8. Once the active medium is excited, the first photons of light are produced by which physical process?
    (A) Blackbody radiation
    (B) Spontaneous emission
    (C) Synchrotron radiation
    (D) Planck’s oscillation

9. The average power (in watts) used by a 20 to 25 inch home color television is?
    (A) 70-100
    (B) 25-50
    (C) 500-800
    (D) Over 1000

10. What does AC and DC stand for in the electrical field?
    (A) Alternating Current and Direct Current
    (B) A Rock Band from Australia
    (C) Average Current and Discharged Capacitor
    (D) Atlantic City and District of Columbia

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