300+ Lab Technician Interview Questions and Answers

Storage devices are used to store and retrieve data. There are various types of storage devices available.

• Hard Disk Drive (HDD)

• Solid State Drive (SSD)

• USB Flash Drive

• Memory Card

• Optical Disc (CD/DVD/Blu-ray)

• Cloud Storage

There are different types of cement with specific specifications for various applications.

• Portland cement is the most common type used in construction.

• It is specified by its strength class, such as 32.5, 42.5, or 52.5.

• Other types include white cement, rapid hardening cement, and sulfate-resistant cement.

• Each type has its own unique properties and uses in different construction projects.

Heparin tubes are used to collect blood samples for coagulation testing.

• Heparin tubes contain lithium or sodium heparin to prevent blood clotting.

• Mix the blood gently with the anticoagulant in the tube by inverting it several times.

• Use a syringe to draw blood directly into the tube, ensuring proper mixing.

• Label the tube with patient information and send it to the lab for testing.

• Heparin tubes are commonly used for tests like PT, APTT, and fibrinogen levels.

Always add acid to water to prevent splashing and potential hazards.

• Add acid slowly to water while stirring to prevent splashing

• Never add water to concentrated acid as it can cause a violent reaction

• Example: When diluting sulfuric acid, slowly pour the acid into a container of water while stirring

Colour coating methods are used to apply a thin layer of coating on a surface to enhance its appearance or protect it from damage.

• Colour coating can be done through various methods such as electroplating, powder coating, and spray painting.

• Electroplating involves the use of an electric current to deposit a thin layer of metal onto a surface.

• Powder coating involves the application of a dry powder to a surface which is then heated to form a protective layer.

• Spray painting invol...read more

Normal range of hemoglobin is typically between 12 to 16 grams per deciliter for adult women and 14 to 18 grams per deciliter for adult men.

• Normal range for adult women: 12-16 g/dL

• Normal range for adult men: 14-18 g/dL

• Hemoglobin levels can vary based on factors such as age, sex, and altitude

• Low hemoglobin levels may indicate anemia, while high levels may be a sign of dehydration or other conditions

I can bring my expertise in laboratory techniques and attention to detail to ensure accurate and efficient results.

• Proficient in various laboratory techniques and equipment

• Strong attention to detail to ensure accurate results

• Ability to troubleshoot and problem-solve

• Excellent communication and teamwork skills

• Experience in maintaining laboratory equipment and supplies

• Familiarity with safety protocols and regulations

• Examples: PCR, ELISA, Western blot, cell culture, microscopy

Albumin is a protein found in the blood that helps regulate blood volume and maintain proper fluid balance in the body.

• Albumin is the most abundant protein in human blood plasma.

• It is produced by the liver and helps transport hormones, vitamins, and drugs throughout the body.

• Albumin also plays a role in maintaining osmotic pressure, which helps prevent fluid from leaking out of blood vessels.

• Low levels of albumin can indicate liver or kidney disease, malnutrition, or other he...read more

Samples should be discarded as per the standard operating procedure (SOP) to maintain accuracy and prevent contamination.

• Follow the SOP provided by the laboratory.

• Discard samples that are contaminated or have expired.

• Dispose of samples in the appropriate waste container.

• Record the discarded samples in the logbook.

• Ensure that the discarded samples do not pose a risk to the environment or public health.

Order of draw refers to the sequence in which different blood collection tubes should be filled during venipuncture.

• Order of draw is important to prevent cross-contamination and ensure accurate test results.

• The order typically starts with tubes used for blood cultures, followed by coagulation tests, chemistry tests, and finally, tubes used for hematology tests.

• For example, the order of draw may be: blood culture tubes, coagulation tubes, serum tubes, heparin tubes, EDTA tubes...read more

Defects in colour coating sheets can include chalking, fading, peeling, and cracking.

• Chalking occurs when the coating breaks down and forms a powdery residue on the surface.

• Fading happens when the colour loses its vibrancy and becomes dull.

• Peeling occurs when the coating separates from the substrate, leaving patches of exposed metal.

• Cracking happens when the coating develops small cracks, which can lead to corrosion.

Gel electrophoresis is a technique used to separate DNA, RNA, or proteins based on size and charge.

• Prepare the gel by mixing agarose powder with buffer solution and pouring it into a gel tray

• Load the samples into wells at one end of the gel

• Apply an electric current to the gel, causing the molecules to move through the gel based on size and charge

• After running the gel, visualize the separated molecules using a dye or stain

• Interpret the results based on the position of the band...read more

My notice period for my previous employer was 30 days.

• My notice period for my previous employer was 30 days.

• I provided the required notice and left on good terms.

• I am available to start immediately.

Iron carbon diagram is a graphical representation of the phases of iron and carbon at different temperatures and compositions.

• It shows the relationship between carbon content and the microstructure of steel.

• It helps in predicting the properties of steel based on its composition.

• It consists of three regions: austenite, ferrite, and cementite.

• It is used in the design and production of steel products.

• Example: A high carbon steel with 0.8% carbon content will have a microstructur...read more

Lipid profile is a blood test that measures the levels of different types of lipids in the blood.

• It includes measurements of total cholesterol, HDL cholesterol, LDL cholesterol, and triglycerides.

• Lipid profile helps assess the risk of developing cardiovascular diseases.

• Abnormal lipid levels can indicate conditions like high cholesterol or triglycerides.

• The test is usually done after fasting for accurate results.

• Example: A lipid profile result may show total cholesterol of 200...read more

LFT profile stands for Liver Function Test profile.

• LFT profile is a set of blood tests that assess the health and function of the liver.

• It includes various parameters such as liver enzymes, bilirubin levels, and proteins.

• LFT profile helps in diagnosing liver diseases, monitoring liver function, and evaluating the effectiveness of treatment.

• Common liver function tests in LFT profile include ALT, AST, ALP, bilirubin, albumin, and total protein.

• Abnormal LFT results may indicate ...read more

Specific gravity test of cement determines the density of cement particles.

• Specific gravity test measures the ratio of the density of cement to the density of water.

• It helps in assessing the quality and consistency of cement.

• The test involves weighing a known volume of cement and comparing it to the weight of an equal volume of water.

• The specific gravity of cement should be between 3.10 to 3.16.

• A higher specific gravity indicates the presence of impurities or excessive moistu...read more

Yes, I have experience in water analysis including testing for pH levels, dissolved oxygen, turbidity, and contaminants.

• Conducted tests for pH levels to determine acidity or alkalinity of water samples

• Measured dissolved oxygen levels to assess water quality and aquatic life support

• Examined turbidity to determine clarity of water and potential sediment levels

• Identified and analyzed contaminants such as heavy metals, pesticides, and bacteria in water samples

Rehometer MI and ML are measurements used to assess the flow properties of materials.

• Rehometer MI measures the melt flow index of a material, indicating its viscosity and flowability.

• Rehometer ML measures the melt flow rate of a material, indicating how easily it can be processed.

• These measurements are commonly used in the plastics industry to determine the suitability of materials for manufacturing processes.

• MI and ML values are important for quality control and product deve...read more

NABL stands for National Accreditation Board for Testing and Calibration Laboratories.

• NABL is an autonomous body under the aegis of the Department of Science and Technology, Government of India.

• It provides accreditation to testing and calibration laboratories in various fields such as mechanical, chemical, biological, and medical.

• NABL accreditation ensures that the laboratory meets international standards and is competent to carry out specific tests or calibrations.

• Some examp...read more

The number of liver tests varies depending on the specific tests being conducted.

• The number of liver tests can range from a basic liver function test (LFT) to more specialized tests like a liver biopsy or imaging studies.

• Common liver tests include ALT, AST, ALP, bilirubin, albumin, and prothrombin time.

• The number of tests may also depend on the patient's medical history, symptoms, and the healthcare provider's recommendations.

Lipid profile is a blood test that measures the levels of fats and cholesterol in the blood.

• It includes measurements of total cholesterol, HDL (good) cholesterol, LDL (bad) cholesterol, and triglycerides.

• Lipid profile helps assess the risk of cardiovascular diseases.

• Abnormal lipid levels can be managed through lifestyle changes, medications, and dietary modifications.

ESR full form is Erythrocyte Sedimentation Rate.

• ESR is a test that measures how quickly red blood cells settle at the bottom of a test tube.

• It is a non-specific test used to detect inflammation in the body.

• High ESR levels can indicate conditions like infections, autoimmune diseases, and cancer.

FSI testing is done to detect the presence of foreign substances in a sample.

• FSI testing helps ensure the purity and safety of products.

• It is commonly used in the pharmaceutical and food industries.

• Examples of foreign substances that may be detected include bacteria, fungi, and chemicals.

• FSI testing can also be used to identify the source of contamination in a production process.

I can help others by providing accurate and timely lab results.

• Performing tests accurately and efficiently

• Communicating results clearly to healthcare professionals

• Ensuring proper handling and storage of samples

• Maintaining a clean and organized lab environment

• Continuing education to stay up-to-date with new technologies and techniques

Antigens are present on the surface of pathogens or foreign substances and can trigger an immune response in the body.

• Antigens are present on the surface of pathogens such as bacteria, viruses, and fungi.

• Antigens can also be present on foreign substances like pollen or dust.

• Antigens are recognized by the immune system as foreign and can trigger the production of antibodies to fight off the invader.

QC and calibration are important for ensuring accuracy and reliability of lab results.

• QC (Quality Control) is necessary to ensure that the lab equipment and procedures are functioning properly and producing accurate results.

• Calibration is the process of adjusting the lab equipment to ensure that it is producing accurate and reliable results.

• Running QC and calibration regularly can help prevent errors and ensure that the lab is producing high-quality results.

• Examples of lab eq...read more

To install an app, you can download it from an app store or website, then follow the installation instructions.

• Download the app from an app store (e.g. Google Play Store, Apple App Store) or website

• Follow the on-screen instructions to install the app

• Grant necessary permissions if prompted during installation process

To install an operating system, you need to boot from the installation media and follow the on-screen instructions.

• Insert the installation media (such as a USB drive or DVD) into the computer

• Restart the computer and access the boot menu to select the installation media as the boot device

• Follow the on-screen instructions to choose the language, partition the hard drive, and install the OS

• Once the installation is complete, remove the installation media and restart the computer

Biochemistry tests are laboratory tests that analyze the chemical components of bodily fluids such as blood, urine, and cerebrospinal fluid.

• Biochemistry tests help diagnose and monitor various medical conditions such as diabetes, liver disease, and kidney disorders.

• Common biochemistry tests include lipid profile, liver function tests, renal function tests, and glucose tests.

• Results of biochemistry tests can provide valuable information about a person's overall health and help...read more

Order of draw is important to prevent cross-contamination and ensure accurate test results.

• Different tubes contain different additives and anticoagulants that can interfere with each other if drawn in the wrong order

• Drawing blood in the correct order helps prevent contamination with additives from previous tubes

• For example, drawing a tube with EDTA before a tube with citrate can cause inaccurate coagulation test results

• Following the order of draw also helps ensure that the co...read more

Calculation of resistance in T network

• In a T network, the resistors are arranged in a T shape

• The total resistance of a T network can be calculated using the formula: R_total = R1 + (R2*R3)/(R2+R3)

• R1 is the resistor connected to the voltage source, while R2 and R3 are the other two resistors

• The T network is commonly used in audio circuits and impedance matching

The code of cement refers to the standard specifications and guidelines for manufacturing and testing cement.

• The code of cement provides information on the composition, physical properties, and performance requirements of cement.

• It includes guidelines for the manufacturing process, quality control, and testing methods.

• Examples of cement codes include ASTM C150, EN 197, and IS 269.

Hematology is the study of blood and blood-forming tissues.

• It involves the diagnosis and treatment of blood disorders and diseases.

• Hematology includes the study of blood cells, their formation, and function.

• Common tests in hematology include complete blood count (CBC) and blood smear.

• Examples of blood disorders include anemia, leukemia, and hemophilia.

Microbiology is the study of microorganisms, including bacteria, viruses, fungi, and parasites.

• It involves the study of the structure, function, and behavior of microorganisms.

• Microbiology has many practical applications, including in medicine, agriculture, and industry.

• Examples of microbiology include studying the effects of antibiotics on bacteria, identifying new strains of viruses, and developing vaccines for infectious diseases.

• Microbiologists use a variety of techniques...read more

Cerebrospinal Fluid

• CSF is a clear, colorless fluid found in the brain and spinal cord

• It acts as a cushion for the brain and spinal cord

• CSF helps remove waste products from the brain and regulates pressure

MFI stands for Melt Flow Index, a measure of the flow properties of a polymer melt.

• MFI is used to determine the viscosity of a polymer melt under specific conditions.

• It is commonly used in the plastics industry to assess the processability of polymers.

• Higher MFI values indicate lower viscosity and easier flow of the polymer melt.

• Lower MFI values indicate higher viscosity and more resistance to flow.

• MFI values are important for quality control and product development in polyme...read more

The normal range for white blood cell (WBC) count is 5000 to 105000.

• WBC count refers to the number of white blood cells in a given volume of blood.

• A WBC count of 5000 to 105000 is considered within the normal range.

• Abnormal WBC counts may indicate certain medical conditions or infections.

• WBC count is an important parameter in diagnosing and monitoring various diseases.

LJ Chat & Westgourd Rules are guidelines for communication and behavior in a laboratory setting.

• LJ Chat Rule: Refers to the guidelines for communication and etiquette in a laboratory chat group.

• Westgourd Rule: Refers to the rules for behavior and conduct in the laboratory workspace.

• Examples: LJ Chat Rule - Use professional language in chat discussions. Westgourd Rule - Clean up your workspace after completing experiments.

Reticulocyte count is a test used to measure the percentage of young red blood cells in the blood.

• Reticulocytes are immature red blood cells that are released by the bone marrow into the bloodstream.

• The count is used to evaluate bone marrow function and to diagnose and monitor conditions such as anemia.

• Normal range for reticulocyte count is typically between 0.5-2.5% of total red blood cells.

• High reticulocyte count may indicate conditions like hemolytic anemia or blood loss, ...read more

Viscosity of raw materials is an important factor in lab testing and analysis.

• Viscosity is the measure of a fluid's resistance to flow

• Raw materials with high viscosity may require additional processing or adjustments

• Examples of raw materials with varying viscosities include oils, syrups, and gels

HDL test measures the amount of good cholesterol in the blood.

• Fast for 9-12 hours before the test

• Blood sample is taken from a vein in the arm

• Results are usually available within a few days

• Normal range for HDL is 40-60 mg/dL

• High levels of HDL are good for heart health

Good blood collection is essential for accurate lab results and patient comfort.

• Use proper technique to avoid contamination

• Ensure patient is in a comfortable position

• Select appropriate size needle for the procedure

• Label tubes correctly to avoid mix-ups

• Follow standard protocols for handling and storing samples

Blood culture test involves collecting blood samples and incubating them to check for bacterial growth.

• Collect blood samples from the patient using a sterile technique

• Inoculate the blood samples into culture bottles containing growth media

• Incubate the culture bottles at the appropriate temperature for a specific period of time

• Check for bacterial growth by observing turbidity or using automated systems

• Subculture positive samples to identify the specific bacteria causing the in...read more

Fasting sugar average is a measure of blood glucose levels after fasting for a certain period of time.

• Fasting sugar average is used to diagnose and monitor diabetes.

• It is typically measured after an overnight fast of 8-12 hours.

• Normal fasting sugar average is usually between 70-99 mg/dL.

• Higher levels may indicate prediabetes or diabetes.

• Lower levels may indicate hypoglycemia or other medical conditions.

Sodium fluoride tubes are used to collect blood samples for glucose testing.

• Collect blood sample using a sodium fluoride tube

• Mix the sample gently to prevent clotting

• Store the tube in a cool place until testing

• Commonly used for glucose testing in diabetic patients

Electrolytes test is a blood test that measures the levels of minerals like sodium, potassium, and chloride in the body.

• Electrolytes are essential minerals that help maintain fluid balance, nerve function, and muscle contractions in the body.

• Common electrolytes measured in the test include sodium, potassium, chloride, and bicarbonate.

• Abnormal levels of electrolytes can indicate dehydration, kidney disease, heart conditions, or other health issues.

• The test is often ordered to ...read more