Latest PDF of ESPA-EST: ESPA Certified Electronic System Technician

ESPA Certified Electronic System Technician Practice Test

ESPA-EST exam Format | Course Contents | Course Outline | exam Syllabus | exam Objectives

Electrical Basics
- Construction Methods and Materials
- Identify differences between AC and DC
- Identify differences between low-voltage and line voltage
- Identify the four basic units of measurement used with electricity, and be able to explain how they relate in Ohms Law
Tools
- Read and identify planning tools, including construction drawings and symbols on
- Identify the various types of documentation tools and methods used on a job/project
- Identify hand tools and their uses, storage, and maintenance
- Identify power tools and their uses, storage, and maintenance
- Identify test equipment and their uses, storage, and maintenance
- Identify construction methods to promote safety, productivity, and quality on a job/project.
- Identify construction materials to promote safety, productivity, and quality on a job/project.
Wiring and Installation Practices
- Identify wire and cable materials
- Identify termination types, pin-out configuration, wire preparation and termination techniques, and connection points on cables and equipment
- Identify color code standards for telephony, speakers, data, and video
- Identify the use of fasteners, anchors, and back boxes used to mount cable and other
- Identify installation techniques and procedures
Standards, Codes, and Safety Practices
- Identify the concept of industry accepted standards and best practices.
- Identify applicable building codes.
- Identify applicable safety practices.

ESPA has created a curriculum that covers 5 key domains of knowledge that an EST must have in order to be prepared to enter the workforce:

• Electrical Basics
• Tools
• Construction Methods and Materials
• Wiring and Installation Practices
• Standards, Codes and Safety Practices

ESPA Certification is a widely recognized industry credential that signifies that an Electronic Systems Technician (EST) has been properly trained to be effective on the job from day one. The certification also shows that you are serious about a career in the electronics industry, and ready to continue to learn and advance.

ESPA Certified-EST is a high-stakes professional industry certification, built according to the highest standards and administered only in a timed, proctored, environment. Employers value the certification and know that those who receive it have the proper entry-level knowledge they require in future employees.

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Question: 103
Which of the following characteristics of a video image does scaling set?
A. Bandwidth
B. Resolution
C. Color
D. Speed
Answer: B
Scaling sets the resolution of a video image.
Key Takeaway: Video scaling is a technique used to convert video signals from
one size or resolution to another. It is usually used to upscale a video signal from
a low to a higher resolution. Video scaler is primarily a digital device. However,
they can be combined with an ADC, or digitizer, and a DAC to support analog
inputs and outputs.
Question: 104
Which of the following refers to the term that defines the area in a house where
everyone receives the same video signal?
A. Sector
B. Video area
C. Theater area
D. Zone
Answer: D
Zone defines the area in a house where everyone receives the same video signal.
Key Takeaway: A general practice used for a video source is to divide the room
into conceptual equal-sized zones. All points in the zone will receive the same
amount of video signal. The location where the equipment is placed should meet
the design, accessibility, and usage needs.
Question: 105
You are troubleshooting an issue where a customer complains that he views
rolling lines or patterns on many television channels. Which of the following
could most likely be the issue?
A. DC power in the cable.
B. Inadequate shielding on coaxial cable.
C. AC power interference.
D. Insufficient cable bandwidth.
Answer: A
The most likely issue is that there is DC power in the cable.
Key Takeaway: Horizontal rolling bars are caused by DC power getting into the
cable system. To fix this issue, you should disconnect the TV from all other
components in the system. If the bars disappear, add the other components back in
until the bars return. When you find the faulty component, use a DC blocker to
eliminate the DC power path to the system.
Question: 106
Which of the following types of coaxial cable shielding is used to resist Radio
Frequency Interference?
A. Dielectric
B. Foil
C. Wire mesh
D. Wire braid
Answer: B
The coaxial cable shielding that is used to resist Radio Frequency Interference is
called a Foil.
Key Takeaway: A foil shield is primarily used to deflect RFI from the cable. Foil
shields have a thin drain wire that allows the foil to be connected to the outer
channel of an F-type or BNC connector.
Question: 107
Which of the following is the QoS Priority for streaming multimedia
transmissions?
A. 5
B. 3
C. 2
D. 4
Answer: D
QoS Priority for streaming multimedia transmissions is 4.
Key Takeaway: Best effort transmissions have a QoS priority of 0. Background
transmissions have a QoS priority of 1. Standard transmissions have a QoS
priority of 2. Business critical transmissions have a QoS priority of 3. Streaming
multimedia transmissions have a QoS priority of 4. Voice and video transmissions
have a QoS priority of 5. Layer 3 network control transmissions have a QoS
priority of 6. Layer 2 network control transmissions have a QoS priority of 7.
Question: 108
Which of the following does the SIP protocol do when one VoIP caller places a
call to another VoIP user?
A. Converts the telephone number into the MAC address of the destination phone.
B. Converts the telephone number into the IP address of the destination phone.
C. Converts the telephone number into the IP address of the source phone.
D. Converts the telephone number into the MAC address of the destination phone.
Answer: B
SIP converts the telephone number into the IP address of the destination phone.
Key Takeaway: SIP allows one VoIP caller to place a call to another VoIP user.
When a caller dials the phone number of a VoIP-based user, SIP converts the
telephone number into the IP address of the destination phone. It then sends an
invitation to the destination address. This causes the phone to ring.
Question: 109
You have connected the conductors of a wire pair to different pins of a terminator
at each end of a cable. Which of the following refers to this condition?
A. Reversed pair
B. Crossed pair
C. Open circuit
D. Short circuit
Answer: A
When you connect the conductors of a wire pair to different pins of a terminator
at each end of a cable, it is known as a reversed pair.
Key Takeaway: Reversed pair is a condition where two lines in a pair are
connected to opposite pins at each end of the cable. It is called a polarity reversal,
or tip-and-ring reversal. If there is a reversed pair condition, the signals on the
telephone line would not be properly received or transmitted.
Question: 110
Which of the following is a commonly used compression technique in analog
cameras?
A. MPEG
B. ACC
C. JPEG
D. CIF
Answer: D
CIF is a commonly used compression technique in analog cameras.
Key Takeaway: CIF, or Common Intermediate Format, is a format used to
standardize the horizontal and vertical resolutions in pixels of YCbCr sequences
in video signals. It was first proposed in the H.261 standard. It defines a video
sequence with a resolution of 352 � 288 like PAL, a frame-rate of roughly 29.97
frames like NTSC, with color encoding using YCbCr at 4:2:0.

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