2A672 Volume 1 Quiz

60 Questions | By Chorne1787 | Updated: Mar 20, 2022 | Attempts: 369

Questions

Settings

Create your own Quiz

Unit Review Questions from CDC 2A672 Volume 1

Questions and Answers

1.

What is the simplest form of matter?
- A.
  
  Element
- B.
  
  Mixture
- C.
  
  Electrons
- D.
  
  Compound
2.

In an atom, what electrons contain the most energy?
- A.
  
  The energy is shared equally by all electrons
- B.
  
  Orbiting electrons
- C.
  
  Valence electrons
- D.
  
  K shell electrons
3.

Atoms having more than four electrons, but less than eight are known as
- A.
  
  Insulators
- B.
  
  Conductors
- C.
  
  Stable atoms
- D.
  
  Semiconductors
4.

The electrostatic fields around a positive ion move
- A.
  
  Inward
- B.
  
  Outward
- C.
  
  Inward, then outward
- D.
  
  Outward, then inward
5.

What are factors that affect the resistance of a material?
- A.
  
  Area, weight, and state of material
- B.
  
  Area, temperature, and type of material
- C.
  
  Temperature, weight, and state of material
- D.
  
  Temperature, type of material, and state of material
6.

What is the resistance in a circuit if the power rating is 40 watts and total current is 2 amps?
- A.
  
  40 ohms
- B.
  
  20 ohms
- C.
  
  10 ohms
- D.
  
  0.5 ohms
7.

Convert 500 milliamps to standard amperage.
- A.
  
  .005 amps
- B.
  
  .05 amps
- C.
  
  .5 amps
- D.
  
  50 amps
8.

In a series-parallel circuit, find RT if series resistor R1 = 7 ohms, and parallel resistors R2 and R3 = 8 ohms.
- A.
  
  23 ohms
- B.
  
  15 ohms
- C.
  
  11 ohms
- D.
  
  8 ohms
9.

In a series-parallel circuit, the series current at I1 = 9 amps; in the two parallel branches, I2 = 5 amps; and the value of I3 is not listed. Use Ohms's law to find the value of I3 and IT.
- A.
  
  I3 = 5 amps and IT = 14 amps
- B.
  
  I3 = 4 amps and IT = 9 amps
- C.
  
  I3 = 4 amps and IT =18 amps
- D.
  
  Not enough information to solve
10.

What is the difference between and open and a short?
- A.
  
  An open causes resistance to decrease; a short causes resistance to increase
- B.
  
  Excessive current flow in an open circuit; no current flow in a shorted component
- C.
  
  No current flow in an open circuit; excessive current flow in a shorted component
- D.
  
  Minimum voltage development across the open component; maximum voltage development across the shorted component
11.

Voltage induced into a conductor by the expanding and collapsing of a magnetic field is
- A.
  
  Magnetism
- B.
  
  Reluctance
- C.
  
  Direct current
- D.
  
  Electromagnetic induction
12.

In an inductor, what happens to the magnetic lines of force if the diameter of the core is increased in size?
- A.
  
  Permeability increases
- B.
  
  Magnetic field decreases
- C.
  
  Induction of the coil increases
- D.
  
  Induction of the coil decreases
13.

What is the basic principle of operation for transformers?
- A.
  
  Mutual induction
- B.
  
  Magnetic induction
- C.
  
  Counterelectromotive force
- D.
  
  Primary and secondary induction
14.

What type of transformer contains more turns in the primary winding than in the secondary winding?
- A.
  
  Current
- B.
  
  Step up
- C.
  
  Rectifier
- D.
  
  Step down
15.

If the size of the plates of a capacitor is increased, how is capacitance affected?
- A.
  
  Capacitance increases
- B.
  
  Capacitance decreases
- C.
  
  Electrons are distorted and scattered
- D.
  
  Electrostatic force between the plates decreases
16.

What statement best describes a capacitive circuit?
- A.
  
  Current leads applied voltage by 90 degrees
- B.
  
  Applied voltage leads current by 90 degrees
- C.
  
  Has the ability to conduct in one direction and not in the other
- D.
  
  Has the ability to conduct in all directions when gated or discharged
17.

How many electrons does the valance band of an intrinsic semiconductor have?
- A.
  
  3
- B.
  
  4
- C.
  
  5
- D.
  
  6
18.

What are the minority carriers in P-type material?
- A.
  
  Holes
- B.
  
  Protons
- C.
  
  Neutrons
- D.
  
  Electrons
19.

The area of a semiconductor where P-type material is joined to N-type material is known as
- A.
  
  Dielectric region
- B.
  
  Depletion region
- C.
  
  Depletion field
- D.
  
  PN region
20.

A junction diode has how many PN junction(s)?
- A.
  
  1
- B.
  
  2
- C.
  
  3
- D.
  
  4
21.

In a circuit using a bridge rectifier, how many diodes are forward biased during the first cycle of alternating current (AC)?
- A.
  
  4
- B.
  
  3
- C.
  
  2
- D.
  
  1
22.

If a zener diode is installed in the forward bias mode in a circuit, it acts as a
- A.
  
  Regular diode
- B.
  
  Spike protector
- C.
  
  Voltage reference
- D.
  
  Voltage regulator
23.

How is a zener diode connected in a circuit to regulate voltage?
- A.
  
  In parallel to the load
- B.
  
  In series with the load
- C.
  
  In parallel to the resistor
- D.
  
  In series with the resistor
24.

If a schematic diagram doesn't list a reference for the zener diode, the diode is probably being used as a
- A.
  
  Reference
- B.
  
  Normal diode
- C.
  
  Spike protector
- D.
  
  Voltage regulator
25.

How is the zener diode connected in a circuit to protect the load?
- A.
  
  In parallel to the resistor
- B.
  
  In series with the load
- C.
  
  In parallel to the load
- D.
  
  Forward biased