Topic 23, Special Design Considerations

Question 1

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) requirement for front reach using a wheelchair. What will be the maximum reachable height of any user interface?

A. 760 mm (30 in)
B. 864 mm (34 in)
C. 1170 mm (46 in)
D. 1220 mm (48 in)
E. 1370 mm (54 in)

Answer 1

D. 1220 mm (48 in)

Question 2

Coupling with electrical circuits can create inductive interference to telecommunications facilities. Which of the following can decrease the coupling effect?

A. Decrease the exposure length
B. Make sure that the single-phase components add in phase
C. Decrease the physical separation
D. Increase the earth resistance

Answer 2

A. Decrease the exposure length

Question 3

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

A. One complete air change per hour
B. Two complete air changes per hour
C. Three complete air changes per hour
D. Four complete air changes per hour
E. Five complete air changes per hour

Answer 3

C. Three complete air changes per hour

Question 4

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 each facility be placed?

A. On opposite sides of the tunnel
B. On the same sides of the tunnel
C. Together on the same pathway for easy access and maintenance
D. One on the top part and one on the bottom part of the same side of the tunnel
E. On the exterior of the tunnel

Answer 4

A. On opposite sides of the tunnel

Question 5

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- induced voltages?

A. Isolating transformers
B. Neutralizing transformers
C. Mutual drainage reactors
D. Unit-type neutralizing transformers
E. 2-winding neutralizing transformers

Answer 5

A. Isolating transformers

Question 6

In new construction, what is the percentage of pay phones that must be equipped with volume controls?

A. 4
B. 10
C. 25
D. 35
E. 50

Answer 6

C. 25

Question 7

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

A. 300 mm (12 in)
B. 450 mm (18 in)
C. 610 mm (24 in)
D. 914 mm (36 in)
E. 2.4 m (8 ft)

Answer 7

C. 610 mm (24 in)

Question 8

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

A. One
B. Two
C. Four
D. Six
E. Eight

Answer 8

C. Four

Question 9

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) requirement for side reach using a wheelchair. What will be the maximum reachable height of the any device?

A. 760 mm (30 in)
B. 864 mm (34 in)
C. 1170 mm (46 in)
D. 1220 mm (48 in)
E. 1370 mm (54 in)

Answer 9

E. 1370 mm (54 in)

Question 10

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

A. 1 m (3 ft)
B. 2 m (7 ft)
C. 4 m (13 ft)
D. 6 m (20 ft)
E. 10 m (30 ft)

Answer 10

D. 6 m (20 ft)

Question 11

What does this international symbol stands for? A phone over a keyboard.

A. Teletypewriter/text telephone
B. Public internet station
C. Public telephone
D. Public telephone with a shelfette
E. Public telephone with access to high-speed internet connection

Answer 11

A. Teletypewriter/text telephone

Question 12

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?

A. 0.2 sq m (2 sq ft)
B. 0.5 sq m (5 sq ft)
C. 1 sq m (10 sq ft)
D. 1.5 sq m (16 sq ft)
E. 2 sq m (20 sq ft)

Answer 12

C. 1 sq m (10 sq ft)