HT0-201 CEA- CompTIA DHTI+ Certification Practice Exam Set 5

Each time the distance from the speaker is doubled, volume decreases by:   


Options are :

  • 12dB.
  • 24dB.
  • 3dB
  • 6dB. (Correct)

Answer : 6dB.

Which of the following determines if the alarm should sound or an entry delay should start? 


Options are :

  • The sensor itself
  • The zone type (Correct)
  • The digital dialer
  • The way the zones are wired

Answer : The zone type

A customer notifies the integrator that the system keypad reports trouble at a window. Upon inspection, the customer finds the window closed and locked; the customer resets the system and it fails to correct the issue. Which of the following steps should the integrator take to resolve the issue? 


Options are :

  • Clean the space between the sensor and the plate.
  • Toggle the tamper switch to reset the sensor.
  • Bypass the zone.
  • Check that the sensor is not misaligned. (Correct)

Answer : Check that the sensor is not misaligned.

Which of the following cabling would be MOST commonly used with digital volume controls?   


Options are :

  • RJ-59
  • 16/4 solid conductors
  • Speaker Wire
  • Unshielded twisted pair (Correct)

Answer : Unshielded twisted pair

Which of the following communication methods will provide the maximum bandwidth for video streaming through a media extender? 


Options are :

  • None of the above
  • 100BaseT Ethernet (Correct)
  • Bluetooth
  • 802.11g
  • Z-Wave

Answer : 100BaseT Ethernet

When installing cables, which of the following is the BEST way of identifying the individual cables? 


Options are :

  • A label within six inches at each end of the cable (Correct)
  • A penciled notation on the panel cover
  • A cable chart mounted in the cabinet
  • A label at the tip of the cable

Answer : A label within six inches at each end of the cable

Which of the following video outputs from a media PC provide the BEST picture quality, when connecting the media PC to a projector? 


Options are :

  • DVI (Correct)
  • S-Video
  • VGA
  • SVGA

Answer : DVI

Which of the following is a diplexer used for? 


Options are :

  • Connects the low noise block down converter (LNB) to the multi-switch.
  • Combines satellite and over the air (OTA) signals. (Correct)
  • Allows one LNB to use two satellites.
  • Allows two satellite tuners to use the same dish.

Answer : Combines satellite and over the air (OTA) signals.

An optical cable is used to transmit: 


Options are :

  • Digital audio from a component to a receiver. (Correct)
  • Digital video from a component to a receiver.
  • Analog audio from a component to a receiver.
  • Analog video from a component to a receiver

Answer : Digital audio from a component to a receiver.

When installing a security system, which of the following connectors would be used to connect the security system to the telephone service demarcation? 


Options are :

  • DB-9
  • RS-232
  • RJ-31x (Correct)
  • RJ-11

Answer : RJ-31x

Which of the following is MOST likely causing an intermittent flashing LED on an IR receiver when the remote control is not being used? 


Options are :

  • The heat from a heating, ventilation, and air conditioning (HVAC) register is being received as infrared noise.
  • A plasma display is emitting infrared noise. (Correct)
  • The power supply is faulty and should be replaced.
  • The radio frequency interference (RFI) is being received as noise.

Answer : A plasma display is emitting infrared noise.

RG-6 coaxial cable is typically used in all of the following applications: 


Options are :

  • Video, digital cable, and satellite applications. (Correct)
  • Thermostat, CCTV, smoke detectors and keypads.
  • Home theater, lighting control and multi-room audio.
  • Multi-room audio, telephone, intercom and temperature control.

Answer : Video, digital cable, and satellite applications.

Small in-ceiling speakers are BEST suited for: 


Options are :

  • Background music and blending in with decor. (Correct)
  • Providing a sub-woofer for great bass reproduction.
  • The user who wants perfect sound reproduction.
  • Loud, bass intensive music (e.g. heavy metal, rock).

Answer : Background music and blending in with decor.

Wires that are installed in air returns above a ceiling must be: 


Options are :

  • Fire proof.
  • Fiberglass coated.
  • Plenum rated. (Correct)
  • Teflon coated.

Answer : Plenum rated.

When certifying a CAT5 cable installation the integrator must perform which of the following tests? 


Options are :

  • Measure Resistance
  • Measure Impedance
  • Calculate Latency
  • Measure Attenuation (Correct)

Answer : Measure Attenuation

Which of the following would be the impedance of an 8 ohm and a 4 ohm speaker that are wired in parallel?   


Options are :

  • 2.66 ohms (Correct)
  • 12 ohms
  • Less than 1 ohm
  • 4 ohms

Answer : 2.66 ohms

When configuring surround sound systems, speaker delay is used to compensate for speaker: 


Options are :

  • Size
  • Power
  • Distance (Correct)
  • Efficiency.

Answer : Distance

Which of the following is the primary purpose of impedance matched volume control? 


Options are :

  • Protects the digital systems from damage
  • Amplifies the speaker signal
  • Maintains proper speaker phase
  • Protects the amplifier from damage (Correct)

Answer : Protects the amplifier from damage

Which of the following BEST describes CAT5e? 


Options are :

  • Contains eight wires within a thick jacket with a rip cord
  • Contains four pair of wires of various gauge
  • Contains four twisted pairs of wires (Correct)
  • Contains two wires in a red fireproof jacket

Answer : Contains four twisted pairs of wires

The native resolution for 1080i is:   


Options are :

  • 1280 x 1080.
  • 1280 x 720.
  • 1920 x 1280.
  • 1920 x 1080. (Correct)

Answer : 1920 x 1080.

Which of the following does an astronomical time clock do? 


Options are :

  • Calculates sunset and sunrise times based on geographical area. (Correct)
  • Determines the ambient light at night with a photocell.
  • Synchronizes the local time displayed with the official world time.
  • Determines the start and end of each of the seasons.

Answer : Calculates sunset and sunrise times based on geographical area.

Which of the following is the correct signal flow for an analog multi-room audio system?   


Options are :

  • Amp, Source, Volume Control, Speaker
  • Speaker, Amp, Volume Control, Source
  • Source, Volume Control, Speaker, Amp
  • Source, Amp, Volume Control, Speaker (Correct)

Answer : Source, Amp, Volume Control, Speaker

Which of the following is the correct wiring order for an RJ-11 two line jack? 


Options are :

  • Black, Red, Green, Yellow (Correct)
  • Black, Green, Red, Yellow
  • Red, Black, Green, Yellow
  • Yellow, Red, Green, Black

Answer : Black, Red, Green, Yellow

If the speakers in an installation are out of phase, this means that: 


Options are :

  • The subwoofer is at the wrong angle.
  • The angle of the speakers are incorrect.
  • The polarity of the speakers are reversed. (Correct)
  • The front and rear speakers are reversed.

Answer : The polarity of the speakers are reversed.

Which of the following can cause ghosting in a video image? 


Options are :

  • Defective HDMI cable
  • Bent pin on an S-Video cable
  • Mislabeled component cables
  • Improperly terminated coax cable (Correct)

Answer : Improperly terminated coax cable

Which of the following is the standard aspect ratio for HDTV? 


Options are :

  • 1.78:1 (Correct)
  • 1.33:1
  • 2.35:1
  • 4:3

Answer : 1.78:1

Which of the following is a RF peer to peer mesh protocol used for lighting and other residential electronics? 


Options are :

  • CEBus
  • Wi-Fi
  • Z-Wave (Correct)
  • X10

Answer : Z-Wave

When integrating a media server into a home theater, which of the following terms BEST describes the technology used to protect the interest of copyright holders (e.g. multimedia content)? 


Options are :

  • Content Management System (CMS)
  • Digital Rights Management (DRM) (Correct)
  • MPEG Layer-3 (MP3)
  • Internet Key Exchange (IKE)

Answer : Digital Rights Management (DRM)

According to Ohm's Law, which of the following is correct? 


Options are :

  • As amperage decreases, resistance decreases
  • As resistance increases, voltage increases
  • As voltage increases, resistance decreases
  • As resistance decreases, amperage increases (Correct)

Answer : As resistance decreases, amperage increases

Which of the following is the recommended placement of the rear surround speakers in a 5.1 surround installation?   


Options are :

  • Directly behind the listener
  • Directly to the left and right and slightly behind the listener (Correct)
  • Directly to the left and right and slightly in front of the listener
  • Above and behind the listener

Answer : Directly to the left and right and slightly behind the listener

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