RCDD Exam Questions

A telephone facility and an electrical facility are required in a tunnel. To reduce the effects of EMI and eliminate the need for additional shielding of the cables, where would ea...

A pay telephone using coins needs to be installed in a public area. In the specifications, it is required that the telephone shall meet the ADA (Americans with Disability Act) requ...

Which type of protection for electrical power stations provide isolation against a rise in potential of station ground and also provide drainage protection against longitudinally-...

One interior TTY must be provided at locations defined as public accommodations with ________ or more pay telephones.

What is the air change requirement for a tunnel of 610 m (2000 ft) long with a diameter of 3.4 m (11 ft)?

What is the MINIMUM distance from the edge of a pool or other water hazards for a weatherproof enclosure?

A pay telephone using coins needs to be installed in a public area. In the specifications, it is required that the telephone shall meet the ADA (American with Disabilities Act) req...

What does this international symbol stands for?

In this future marina layout, what would be the pre-cabling guideline to follow for the terminal A?

In an office area, a consultant needs to add the location of a fax machine to the plan. What is the approximated floor area that a fax machine occupies?

What is the MINIMUM clearance needed between the front of the telephone booth and any wall or fixture for most installations?

You have just finished a design calling for 15 telecommunications outlets. You received word that the owner has increased his requirements by 40%. What size commercial DD (distribu...

You are designing a multi-story dwelling and need to place the CTR's. Every floor is not available. What is the alternate spacing for the CTRs?

You are designing distribution for a seven unit townhouse with in slab conduits. What is the MINIMUM number of 27 mm (1 in) rigid PVC Type 2 or metallic conduit that is required to...

You are designing a system requiring the transmission of data. Your system must perform higher than ________ kHz in order to do so.

To accommodate telephone, data, CATV, security and multimedia, a MINIMUM of ________ strands of optical fiber auxiliary disconnect outlet (ADO) cable should be provided.

Which service is NOT typical of Grade 1?

You must place a cable between 2 equipment locations with separate grounds having a potential difference between them of 2.1 V rms. Which one of the following cables should NOT be...

Which characteristic is an advantage of copper based media over optical fiber cable?

A SONET OC-1 channel can carry 672 voice signals and has a data rate of 51.84 Mbps. A SONET OC-48 channel can carry 32,256 voice channels. What MINIMUM data rate is required for th...

Which electrical characteristic is displayed with the correct preferred value?

A reasonable approximation for the signal speed in 100 ohm balanced twisted pair cable is __________, where c is the velocity of light in free space.

Two sinusoidal signals have the same amplitude (A) and the same frequency (f). They differ in phase by 180 degrees. If these two signals are added together, the result is a sinusoi...

The signal at the input to a balanced twisted pair cable is 10 mW. The cable is 1000 feet long and has an attenuation of 1 dB per 100 feet. This cable is connected to the input of...

If the input signal power to a communication system is 1 W and the output power is 1 mW, the system attenuation is:

Which of the following correctly lists the lowest frequency band to the highest frequency band?

You must place CAT6 cable above a factory floor with automated welding machines and hammer forges. Of the following, what type of shielding would be most effective?

Which is an advantage of stranded conductors over solid conductors?

Time division multiplexing (TDM) systems are designed to transport ________ between end point systems.

Which active DAS component is responsible for coupling input signals from donor systems?

What is at the "root" of a DAS (distributive antenna system)?

You are designing a 4.9 GHz microwave system that is using rectangular waveguide from the transceiver to the inside wall of the shelter and an antenna using elliptical waveguide fr...

You are designing multi band UHF police radio and VHF fire radio systems for a municipal office. Because of the closeness of the transmit and receive frequencies, you must ensure t...

Which device supplies the radio signal into a DAS (distributive antenna system)?

You are designing a 4.9 GHz microwave system that is using rectangular waveguide from the transceiver to the inside wall of the shelter and an antenna that is to be placed 200 ft u...

When considering the DAS, which component acts as a bidirectional antenna?

The propagation and path loss of radio signals in the target environment can be sampled using:

Which wireless device should be used to support 3 computers and a printer?

Given the following values, calculate the focal length of the camera lens. - Distance of the camera to the object is 5 m - Vertical field of view is 2 m - Horizontal field of view...

What is the MOST important aspect of fire alarm signaling?

What is the connector of choice for Series 59, Series 6, and Series 11 applications?

What type of fiber optic cable is manufactured to protect individual glass strands and is primarily designed for use inside buildings?

What type of optical fiber is used primarily for outside plant (OSP) applications?

The RJ-45 is now known as the 8P8C style connector, per the Telecommunications Industry Association (TIA) standard. What does the P and C stand for?

What is the frequency rating of an International Organization for Standardization/International Electrotechnical Commission (ISO/IEC) Category 7/Class F cable?

There are three buildings approximately 400 meters apart and the customer wants to use 10 Gig Ethernet. What fiber should be specified for this application?

If looking to specify an optical fiber backbone within a building going 275 m (902 ft) between the equipment room (ER) and the telecommunications room (TR), what type of fiber shou...

Which of the following is NOT a type of connector for optical fiber?

A furniture cluster with 26 requires a MINIMUM of how many multiuser telecommunications outlet assembly (MUTOA)?

When specifying telecommunications outlet boxes, all of the following should be considered EXCEPT: