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Latest EMRS Lab Attendant Exam Question (Objective Questions), MCQ in English

Subjects : Lab Attendant

Question Bank EMRS Lab Attendant Tier 2 Exam - English
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Lab Attendant

Question 1Single Answer
The primary purpose of a fume hood in a chemistry lab is:
  1. A
    To remove toxic fumes and vapors
  2. B
    To store chemicals
  3. C
    To conduct high-temperature reactions
  4. D
    To weigh chemicals
Question 2Single Answer
The emergency eyewash station must be flushed for how long weekly to prevent bacterial growth?
  1. A
    3 minutes
  2. B
    30 seconds
  3. C
    10 minutes
  4. D
    1 minute
Question 3Single Answer
In a school lab, the maximum permissible noise level as per safety norms is:
  1. A
    55 dB
  2. B
    85 dB
  3. C
    75 dB
  4. D
    100 dB
Question 4Single Answer
The color code for a chemical waste container holding acids is:
  1. A
    Red
  2. B
    Yellow
  3. C
    Blue
  4. D
    Green
Question 5Single Answer
Distilled water in a lab is stored in:
  1. A
    Polyethylene carboys with vented caps
  2. B
    Clear plastic containers
  3. C
    Brown glass bottles
  4. D
    Metal drums
Question 6Single Answer
The minimum clearance required around a fire extinguisher in a lab is:
  1. A
    0.5 m
  2. B
    1 m
  3. C
    1.5 m
  4. D
    2 m
Question 7Single Answer
A safety data sheet (SDS) must be available within how many seconds of need?
  1. A
    120 seconds
  2. B
    30 seconds
  3. C
    60 seconds
  4. D
    10 seconds
Question 8Single Answer
The floor of a chemistry lab should have:
  1. A
    Vinyl sheets
  2. B
    Wooden tiles
  3. C
    Carpet
  4. D
    Anti-slip, chemical-resistant epoxy coating
Question 9Single Answer
The ideal temperature for a chemical storage room is:
  1. A
    30–35°C
  2. B
    0–10°C
  3. C
    15–25°C
  4. D
    Below 0°C
Question 10Single Answer
Reagent bottles should be labeled with:
  1. A
    Only chemical name
  2. B
    Chemical name, concentration, hazard symbol, date of preparation
  3. C
    Only volume
  4. D
    Only supplier name
Question 11Single Answer
The maximum shelf life of a prepared 0.1N NaOH solution in a plastic bottle is:
  1. A
    Indefinite
  2. B
    1 year
  3. C
    2 years
  4. D
    6 months
Question 12Single Answer
Glassware should be stored:
  1. A
    In acid bath
  2. B
    Upright in open shelves
  3. C
    In water
  4. D
    Inverted on lint-free paper or in dust-free cabinets
Question 13Single Answer
The first step when entering a biology lab with a specimen is:
  1. A
    Switch on microscope
  2. B
    Open windows
  3. C
    Wear lab coat and gloves
  4. D
    Start dissection
Question 14Single Answer
The ventilation rate in a chemistry lab should be:
  1. A
    6–10 air changes per hour
  2. B
    1–2 air changes per hour
  3. C
    15–20 air changes per hour
  4. D
    No ventilation needed
Question 15Single Answer
Chemical spill kits must contain:
  1. A
    Only gloves
  2. B
    Only paper towels
  3. C
    Only water
  4. D
    Neutralizing agents, absorbent pads, PPE, disposal bags
Question 16Single Answer
The pH meter electrode should be stored in:
  1. A
    Distilled water
  2. B
    3M KCl solution
  3. C
    Dry
  4. D
    1N HCl
Question 17Single Answer
Flammable cabinets must be:
  1. A
    Open shelves
  2. B
    Grounded and self-closing
  3. C
    Wooden
  4. D
    Plastic
Question 18Single Answer
The maximum weight on a single lab bench shelf is:
  1. A
    25 kg
  2. B
    100 kg
  3. C
    50 kg
  4. D
    200 kg
Question 19Single Answer
Lab logbook entries must be in:
  1. A
    White ink
  2. B
    Pencil
  3. C
    Digital only
  4. D
    Permanent ink, no erasures, signed and dated
Question 20Single Answer
The ideal relative humidity in a computer lab is:
  1. A
    70–80%
  2. B
    20–30%
  3. C
    40–60%
  4. D
    Below 20%
Question 21Single Answer
The least count of a vernier caliper with 10 vernier divisions and main scale 1 mm is:
  1. A
    0.1 mm
  2. B
    0.01 mm
  3. C
    0.02 mm
  4. D
    1 mm
Question 22Single Answer
Screw gauge is used to measure:
  1. A
    Diameter of wire, thickness of plate
  2. B
    Volume
  3. C
    Mass
  4. D
    Temperature
Question 23Single Answer
The zero error in a screw gauge is corrected by:
  1. A
    Ignoring it
  2. B
    Subtracting/adding from final reading
  3. C
    Recalibrating
  4. D
    Replacing spindle
Question 24Single Answer
Ammeter is connected in:
  1. A
    Parallel
  2. B
    Series
  3. C
    Either
  4. D
    None
Question 25Single Answer
Voltmeter has:
  1. A
    Zero resistance
  2. B
    Low resistance
  3. C
    High resistance
  4. D
    Infinite resistance
Question 26Single Answer
The range of a multimeter is changed using:
  1. A
    Selector switch
  2. B
    Battery
  3. C
    Probe
  4. D
    Display
Question 27Single Answer
Rheostat is used as:
  1. A
    Variable resistor
  2. B
    Fixed resistor
  3. C
    Capacitor
  4. D
    Inductor
Question 28Single Answer
The unit of resistance is:
  1. A
    Watt
  2. B
    Volt
  3. C
    Ampere
  4. D
    Ohm
Question 29Single Answer
Oscilloscope measures:
  1. A
    Only voltage
  2. B
    Waveform, frequency, amplitude
  3. C
    Only current
  4. D
    Only power
Question 30Single Answer
The time base control in CRO adjusts:
  1. A
    Horizontal scale
  2. B
    Vertical scale
  3. C
    Brightness
  4. D
    Focus
Question 31Single Answer
Travelling microscope is used to measure:
  1. A
    Small linear distances
  2. B
    Large distances
  3. C
    Mass
  4. D
    Volume
Question 32Single Answer
The least count of travelling microscope is typically:
  1. A
    0.1 cm
  2. B
    0.001 cm
  3. C
    1 cm
  4. D
    0.01 mm
Question 33Single Answer
Resonance tube experiment determines:
  1. A
    Amplitude
  2. B
    Wavelength only
  3. C
    Frequency only
  4. D
    Speed of sound
Question 34Single Answer
Sonometer is used to verify:
  1. A
    Laws of tension, length, mass
  2. B
    Ohm’s law
  3. C
    Newton’s laws
  4. D
    Archimedes
Question 35Single Answer
Spectrometer measures:
  1. A
    Only wavelength
  2. B
    Angle of prism, refractive index
  3. C
    Only intensity
  4. D
    Only color
Question 36Single Answer
The collimator in spectrometer produces:
  1. A
    Divergent beams
  2. B
    Parallel beams
  3. C
    Convergent beams
  4. D
    No beam
Question 37Single Answer
Galvanometer is converted to ammeter by:
  1. A
    Low resistance shunt in parallel
  2. B
    High resistance in series
  3. C
    Capacitor
  4. D
    Inductor
Question 38Single Answer
Potentiometer measures:
  1. A
    Only resistance
  2. B
    EMF without drawing current
  3. C
    Only current
  4. D
    Only power
Question 39Single Answer
Daniel cell is a:
  1. A
    Primary cell
  2. B
    Secondary cell
  3. C
    Fuel cell
  4. D
    Dry cell
Question 40Single Answer
Lissajous figures are observed using:
  1. A
    Galvanometer
  2. B
    Only one signal
  3. C
    CRO with two signals
  4. D
    Spectrometer
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