Clinical Chemistry I ASCP Review
2025/2026 Exam Questions and Answers
| 100% Solved
Which of the following lamps provides a continuous spectrum of radiant
energy in the visible, near IR, and near UV regions of the spectrum?
A. Tungsten-filament
B. Hydrogen
C. Deuterium
D. Mercury vapor - 🧠ANSWER ✔✔A most common light source for
photometry in the visible region. continuous spectrum (360-800 nm). near
IR and UV.
Hydrogen and Deuterium (200-375 nm)
,Mercury vapor- not a continuous spectrum, emitting radiation at specific
wavelengths
Which of the following isolates light
within a narrow region of the spectrum?
A. Photomultiplier tube
B. Monochromator
C. Photovoltaic cell
D. Detector - 🧠ANSWER ✔✔B Use for selecting a narrow band
wavelengths from a continuous spectrum. Three kinds (prisms, filters,
diffraction gratings.
Which of the following is not descriptive of a photomultiplier tube?
A. Emits electrons proportionally to
initial light absorbed
B. Must be shielded from stray light
C. Cannot be used with a chopper
D. Amplifies the initial signal received - 🧠ANSWER ✔✔C
,PMT- responds to the radiant energy light it absorbs by emitting electrons
in a proportional amount to the initial light absorbed.
Which of the following is false about
a photomultiplier tube?
A. Converts radiant energy (light)
to electrical energy (current)
B. Amplifies the current significantly
C. Has a very rapid response time
D. Is composed of an iron plate and
a layer of selenium - 🧠ANSWER ✔✔D is part of a barrier layer cell
PMT- 1. light to electricity
2. Amplification
5. Which type of photodetector employs a linear arrangement that allows it
to respond to a specific wavelength resulting in complete UV/visible
spectrum analysis?
A. Photomultiplier tube
B. Phototube
3
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
, C. Barrier layer cell
D. Photodiode array - 🧠ANSWER ✔✔D
256-2048 arranged in a linear fashion
Respond to a specific wavelength that results in a continuous UV/ visible
spectrum.
When performing spectrophotometer
quality assurance checks, what is the
holmium oxide glass filter used to assess?
A. Linearity
B. Stray light
C. Absorbance accuracy
D. Wavelength accuracy - 🧠ANSWER ✔✔D
In spectrophotometric analysis, what is the purpose of the reagent blank?
A. Correct for interfering chromogens
B. Correct for lipemia
C. Correct for protein
2025/2026 Exam Questions and Answers
| 100% Solved
Which of the following lamps provides a continuous spectrum of radiant
energy in the visible, near IR, and near UV regions of the spectrum?
A. Tungsten-filament
B. Hydrogen
C. Deuterium
D. Mercury vapor - 🧠ANSWER ✔✔A most common light source for
photometry in the visible region. continuous spectrum (360-800 nm). near
IR and UV.
Hydrogen and Deuterium (200-375 nm)
,Mercury vapor- not a continuous spectrum, emitting radiation at specific
wavelengths
Which of the following isolates light
within a narrow region of the spectrum?
A. Photomultiplier tube
B. Monochromator
C. Photovoltaic cell
D. Detector - 🧠ANSWER ✔✔B Use for selecting a narrow band
wavelengths from a continuous spectrum. Three kinds (prisms, filters,
diffraction gratings.
Which of the following is not descriptive of a photomultiplier tube?
A. Emits electrons proportionally to
initial light absorbed
B. Must be shielded from stray light
C. Cannot be used with a chopper
D. Amplifies the initial signal received - 🧠ANSWER ✔✔C
,PMT- responds to the radiant energy light it absorbs by emitting electrons
in a proportional amount to the initial light absorbed.
Which of the following is false about
a photomultiplier tube?
A. Converts radiant energy (light)
to electrical energy (current)
B. Amplifies the current significantly
C. Has a very rapid response time
D. Is composed of an iron plate and
a layer of selenium - 🧠ANSWER ✔✔D is part of a barrier layer cell
PMT- 1. light to electricity
2. Amplification
5. Which type of photodetector employs a linear arrangement that allows it
to respond to a specific wavelength resulting in complete UV/visible
spectrum analysis?
A. Photomultiplier tube
B. Phototube
3
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
, C. Barrier layer cell
D. Photodiode array - 🧠ANSWER ✔✔D
256-2048 arranged in a linear fashion
Respond to a specific wavelength that results in a continuous UV/ visible
spectrum.
When performing spectrophotometer
quality assurance checks, what is the
holmium oxide glass filter used to assess?
A. Linearity
B. Stray light
C. Absorbance accuracy
D. Wavelength accuracy - 🧠ANSWER ✔✔D
In spectrophotometric analysis, what is the purpose of the reagent blank?
A. Correct for interfering chromogens
B. Correct for lipemia
C. Correct for protein
