PART 1 Flashcards
Pick the INCORRECT fire safety Classification:
Class C Fire = oxygen & fuel
Type of glassware that can be heated to 600C without softening
Borosilicate glass
Maximum allowable bacterial population in a type I water
10 CFU/mL
Diluting an acid solution involves the following step:
Diluents is added first
Labware quality control includes the following EXCEPT:
Cleaning with chromic acid solution involves
Method recommended by NCCLS for calibrating pipets
Gravimetric method
“To deliver” (TD) or “Blowout pipets” are characterized by:
An “etched ring or double ring” markings toward the top
Which formulary for conversion to SI unit is wrong?
Glucose______mg/dL x 0.5151 = mmol/L
The required resistivity of a Type I water
10
A blood specimen was extracted at 6 am today by a phlebotomist. The MedTech in charge of Chemistry section today will report to duty at 8 am. Which of the following is INCONSISTENT with the condition:
The level of glucose in the specimen will be 5% lower after the test is done
Preferred sites for venipuncture:
Median cubital and cephalic veins
The toxicity of tobacco smoking is due to the fact that this gaseous content of tobacco smoke has 210x affinity for hemoglobin than any other:
Carbon monoxide
Lactescence of serum can cause inhibition of the following EXCEPT:
Cholesterol
Its equivalent is the quantity of its substance that contain one replaceable hydrogen:
Acid compound
Dubowski (Dubosq) colorimeter is an example of:
Visual colorimetry
Beer Lambert’s Law may only be applied in accurate quantitative analysis by light absorption, if the following requisites are met EXCEPT:
A chemical reaction occurs between the molecule of interest and another solute
This is used to correct non-specific absorbance of other substances in the sample:
Sample blank
Icteric serum means that the serum bilirubin level is equal or more than
430 umol or 25 mg/L
Receptacle for non-infectious non-biodegrable wastes:
Black
Its mechanism is based on fragmentation and ionization
Mass spectrometry
This transducer is based on the changes in electrochemical properties of a substance:
Amperometric
It measures flashes of light that occur when gamma rays or charged particles interact with matter:
Scintillation counter
In an electrolytic cell, the half-cell where reduction takes place is known as the:
Cathode
When the pH-sensitive glass electrode is not actively in use, it should be kept in
The medium recommended by the manufacturer
Colligative properties of solution include all of the following EXCEPT:
PH
The main advantage of fluorometric over spectroscopic methods of analysis are:
Increased specificity and increased sensitivity
Centrifugal analyzers utilize centrifugal force for the purpose of:
Separating proteins and high molecular weight substances
Nephelometry is a method of assay based on the measurement of the light that is:
Scattered by particles in suspension
When measuring k’ with an ion- selective electrode by means of liquid ion- exchange membrane, what antibiotic will be incorporated into the membrane?
Valinomycin
When performing spectrophotometer quality control checks, the holmium oxide glass filter is used to assess.
Wavelength accuracy
Which type of elution technique may be used in high- performance liquid chromatography?
Gradient
Which may be associated with bioluminescence?
Light emission produced with return of electron to ground state
Most atomic absorption spectrophotometers incorporate a beam chopper and a tuned amplifier. The purpose of these components is to avoid errors caused by
Measurement of light of specific wavelength emitted by analyte
Fluorometers are designed so that the path of the exciting light is at a right angle to the path of the emitted light. The purpose of this design is to
Prevent emitted fluorescent light from reaching the detector
An analysis for sodium is performed on an aliquot of 24- hour urine specimen. A sodium value of 122.5 mmol/L is read from the flame photometer display window. What is the amount of
sodium in the 24- hour urine specimen if 1540 mL of urine are collected?
79.5
Calculate the pH of a 0.2 N acetic acid solution that is 1% jonized.
0.699
What is the relative centrifugal force (g) of a centrifuge operating at 2500 rpm with a radius
of 10 cm?
699
Because of a malfunction, a spectrophotometer is able to show only the percent transmittance (%T) readings on its digital display. Convert 68%T to its corresponding absorbance.
0.1675
Which type of fire extinguisher should be used on an electrical equipment fire?
Type C
In the Hazards Identification System, four color- coded, diamond- shaped symbols are arranged to form a larger diamond shape. What type of hazard does the red diamond positioned to the top identify?
Flammability
An aluminum- silicate glass that is at least six times stronger than borosilicate and is resistant to alkaline, etching and scratching is
Corex
Which of the following may be safely pipetted by mouth?
None of the above
In a laboratory, a technologist has spilled a corrosive material, which has landed on his/her hand and the floor. He/she has diluted the material by putting his/her hand under
running cold water. The next step would be:
Dilute the spill with water and remove it in a biohazard bag
