RCDD TEST QUESTIONS (TOPIC 15 - TOPIC 21)
EXAM STUDY MATERIALS QUESTION AND
ANSWERS (VERIFIED ANSWERS)
1. **What is the recommended distance between ceiling-mounted speakers in a hallway with heavy
traffic?**
- A) 2.4 m (8 ft)
- B) 3.7 m (12 ft)
- C) 4.9 m (16 ft)
- D) 6 m (20 ft)
**ANSWER:** A) 2.4 m (8 ft)
2. **A space has all hard surfaces and the sound from the distributed system is unintelligible. Which of
the following will NOT fix the problem?**
- A) Add tapestries to the walls
- B) Provide additional speakers at lower output
- C) Increase the volume to the existing speakers
- D) Reduce the distance of the existing speakers to the listener
**ANSWER:** C) Increase the volume to the existing speakers
3. **What are the three typical voltages used in centrally amplified paging systems?**
- A) 24, 48, and 90
- B) 25, 70, and 100
,ESTUDY
- C) 25, 90, and 120
- D) 48, 90, and 120
**ANSWER:** B) 25, 70, and 100
4. **Calculate the power required to produce 89 dB at 4 m (13.1 ft) with a speaker rated at 95 dB SPL.
What power (in watts) is needed?**
- A) 1 watt
- B) 2 watts
- C) 4 watts
- D) 8 watts
**ANSWER:** C) 4 watts
5. **For a 588 sq m (6325 sq ft) open office with wall-mounted speakers, how many speakers should be
installed?**
- A) Eight
- B) Ten
- C) Twelve
- D) Fourteen
**ANSWER:** C) Twelve
6. **What is the highest typical ambient noise level where audio paging becomes unintelligible?**
- A) 75 dB
- B) 85 dB
,ESTUDY
- C) 95 dB
- D) 105 dB
**ANSWER:** C) 95 dB
7. **Which component is typically NOT part of a paging system?**
- A) Strobe
- B) Distribution
- C) Amplification
- D) Loudspeakers
**ANSWER:** A) Strobe
8. **For a four-story retail mall with multiple sound systems, which system should support general
music programming in common areas?**
- A) Distributed paging
- B) Life safety
- C) Sound masking
- D) Sound reinforcement and playback
**ANSWER:** D) Sound reinforcement and playback
9. **A well-designed paging system should have a sound pressure level (SPL) for audio paging that is
between ________ above the ambient noise level.**
- A) 3 dB and 6 dB
- B) 6 dB and 10 dB
, ESTUDY
- C) 10 dB and 20 dB
- D) 20 dB and 55 dB
**ANSWER:** C) 10 dB and 20 dB
10. **In a hallway with normal traffic, ceiling-mounted speakers should be placed ________ times the
corridor height, minus the ________.**
- A) Two; average height of listener's ear
- B) Two; width of corridor
- C) Three; average height of listener's ear
- D) Three; width of corridor
**ANSWER:** A) Two; average height of listener's ear
11. **For a restaurant in a mall, where the ambient noise is 70 dB and the mall noise is 75 dB, what is
the MINIMUM SPL for the paging system in the restaurant?**
- A) 70 dB
- B) 75 dB
- C) 80 dB
- D) 85 dB
**ANSWER:** C) 80 dB
12. **Loudspeakers are typically rated for a measured sound pressure level (SPL) at:**
- A) 1 m (3.3 ft) from the loudspeaker with 1 watt of power input
- B) 1 m (3.3 ft) from the loudspeaker with 2 watts of power input
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Estudyr. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.49. You're not tied to anything after your purchase.
