CAT Industry Knowledge and Safety Standards 2

Question 1

Under OSHA regulations, what is the permissible exposure limit (PEL) for continuous noise over an 8-hour workday?

Accepted Answer

90 dB(A)

Answer

85 dB(A)

Answer

95 dB(A)

Answer

100 dB(A)

Question 2

Which NFPA code specifically governs the installation of audio/visual systems in life safety applications?

Accepted Answer

NFPA 72

Answer

NFPA 70

Answer

NFPA 101

Answer

NFPA 110

Question 3

What does the acronym MSDS stand for in the context of commercial audio installation?

Accepted Answer

Material Safety Data Sheet

Answer

Minimum Sound Distribution Standard

Answer

Multi-Source Distribution System

Answer

Maximum Signal Distortion Specification

Question 4

A CAT technician is working in a venue with a reverb time of 3.5 seconds. Which treatment would most effectively reduce low-frequency buildup?

Accepted Answer

Corner-mounted bass traps

Answer

Broadband fiberglass panels

Answer

Polycylindrical diffusers

Answer

Ceiling cloud reflectors

Question 5

Which standard defines the minimum wire gauge requirements for speaker circuits carrying 70-volt distributed audio in commercial installations?

Accepted Answer

NEC Article 640

Answer

NEC Article 725

Answer

NEC Article 800

Answer

NEC Article 820

Question 6

When installing a ceiling speaker in a plenum space, what cable type is required by the NEC?

Accepted Answer

CMP rated plenum cable

Answer

CL2 rated cable

Answer

CMR rated riser cable

Answer

CM rated general-purpose cable

Question 7

What is the standard impedance for a professional balanced audio line in commercial AV installations?

Accepted Answer

600 ohms (legacy) / low impedance bridging

Answer

8 ohms

Answer

75 ohms

Answer

10,000 ohms