Exhibit: 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…

Question

Exhibit

Options

• A760 mm (30 in)
• B864 mm (34 in)
• C1170 mm (46 in)
• D1220 mm (48 in)
• E1370 mm (54 in)

• A
  2% (1)
• B
  12% (5)
• D
  78% (32)
• E
  7% (3)

Explanation

Option D (1220 mm / 48 in) is correct because ADA Standards for Accessible Design specify that the maximum height for an unobstructed forward (front) reach from a wheelchair is 48 inches (1220 mm). This ensures a seated wheelchair user can operate controls like a coin slot or keypad without unsafe stretching.

Why the distractors are wrong:

• A (760 mm / 30 in) is the ADA minimum forward reach height (floor to the lowest operable control), not the maximum.
• B (864 mm / 34 in) is not a standard ADA reach threshold - it may be confused with countertop or lavatory heights in other ADA provisions.
• C (1170 mm / 46 in) is close but not the codified ADA limit; it does not correspond to any standard forward reach boundary.
• E (1370 mm / 54 in) is the maximum for a side reach, not a front/forward reach - a common and dangerous mix-up on exams.

Memory tip: Think "48 for Front, 54 for Side" - front reach maxes at 48 in, side reach maxes at 54 in. Since the question specifies front reach, 48 in (1220 mm) is the answer every time.

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