CSLB General Building (B) Trade Practice Test
Preguntas frecuentes
¿Cuántas preguntas de práctica de ABO Optician hay aquí?+
Un banco completo de preguntas originales de ABO Optician en las áreas oficiales, con el peso del examen real y explicaciones. Gratis, sin registro.
¿Cómo es el examen ABO Optician?+
Unas 100 preguntas, 120 minutos. Practica por tema aquí y luego haz el simulacro cronometrado para medir tu preparación.
¿Estas son las preguntas reales del examen?+
No. Cada pregunta es 100% original, escrita de fuentes públicas con explicaciones. Nunca copiamos preguntas reales ni material de preparación pagado.
¿Puedo estudiar en chino o español?+
La práctica de PrepPass está en inglés, 中文 y español. El examen oficial es en inglés — cambia el idioma de las preguntas a inglés para ensayar la terminología del día del examen.
Preguntas de práctica de ejemplo
Algunas preguntas reales de este banco gratuito, con explicaciones completas. Usa la herramienta de arriba para el banco completo.
- 1. Ophthalmic Optics
What is the focal length of a +2.00 D lens?
- a.10 cm
- b.25 cm
- c.50 cm
- d.200 cm
Respuesta: c
Explicación: Focal length in meters equals 1 divided by the lens power in diopters. 1 / 2.00 = 0.50 m, or 50 cm. A stronger plus lens would have a shorter focal length.
- 2. Ophthalmic Optics
If the distance Rx is -3.00 D and the add is +2.00 D, what is the total power in the reading portion?
- a.-1.00 D
- b.-5.00 D
- c.+2.00 D
- d.-3.00 D
Respuesta: a
Explicación: The near power equals the distance sphere plus the add. -3.00 + 2.00 = -1.00 D in the reading zone.
- 3. Ophthalmic Optics
A prism deviates light in which direction?
- a.Toward the base
- b.There is no deviation
- c.Toward the apex
- d.Along the axis
Respuesta: c
Explicación: Light passing through a prism bends toward the thick base, while the image seen through it displaces toward the thin apex. Prism power is measured in prism diopters.
- 4. Prescription Analysis
Transpose the Rx: +2.00 -1.00 x 090 into plus-cylinder form.
- a.+1.00 +1.00 x 180
- b.+3.00 -1.00 x 180
- c.+2.00 +1.00 x 090
- d.+1.00 -1.00 x 090
Respuesta: a
Explicación: To transpose: add the sphere and cylinder for the new sphere (+2.00 + -1.00 = +1.00), change the cylinder sign (+1.00), and rotate the axis 90 degrees (090 becomes 180). Result: +1.00 +1.00 x 180.
- 5. Prescription Analysis
Compensated (effective) power differs from the prescribed power mainly due to what?
- a.Frame color
- b.Lens tint
- c.Vertex distance and lens tilt
- d.Bridge size
Respuesta: c
Explicación: When a high-powered lens sits at a vertex distance or tilt different from where it was refracted, its effective power on the eye changes, so a compensated power is calculated to preserve the intended correction.
- 6. Prescription Analysis
Compensated power calculations are most critical when the fitted vertex distance differs from what?
- a.The frame PD
- b.The refracted vertex distance
- c.The seg height
- d.The base curve
Respuesta: b
Explicación: The refraction is done at a specific vertex distance; when the dispensed frame sits at a different vertex distance, the effective power shifts, so compensation restores the intended power at the eye.
- 7. Dispensing
High-minus lenses can be made cosmetically thinner at the edge by doing what?
- a.Increasing the base curve
- b.Adding pantoscopic tilt
- c.Using a higher-index material and edge treatments like a roll and polish
- d.Choosing a larger frame
Respuesta: c
Explicación: Higher-index materials reduce edge thickness for minus lenses, and a smaller frame plus proper decentration further reduces thickness. Rolling and polishing the edge improves the cosmetic appearance.
- 8. Dispensing
For a progressive lens, insufficient seg/fitting height (frame too shallow) causes what problem?
- a.Distance blur
- b.Too much add power
- c.Excess prism
- d.Not enough room for the reading zone, cutting off near vision
Respuesta: d
Explicación: Progressive corridors need adequate vertical depth; if the frame's B measurement is too small, the reading portion at the bottom is cut off, leaving the wearer with inadequate near vision.
- 9. Instruments & Regulatory
Under FDA regulations, all dress eyewear lenses sold in the United States must be what?
- a.Made of glass
- b.Tinted
- c.Impact resistant (capable of passing the drop-ball test)
- d.Polarized
Respuesta: c
Explicación: The FDA requires prescription and non-prescription dress lenses to be impact resistant, historically demonstrated by the drop-ball test, to protect wearers from lens shattering into the eye.
Fuente: FDA impact resistance
- 10. Optical Math
Using Prentice's rule, how much prism is induced when a +4.00 D lens is decentered 5 mm?
- a.1.0 prism diopter
- b.2.0 prism diopters
- c.20 prism diopters
- d.0.5 prism diopters
Respuesta: b
Explicación: Prentice's rule: prism (prism diopters) = decentration (cm) x power (D). 5 mm = 0.5 cm; 0.5 x 4.00 = 2.0 prism diopters.