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Question Bank

Question for IOCL Junior Operator Grade 1 - Quiz / Questions / MCQ in English

Last Update on : October 10, 2026

Duration: 120 · Questions: 100 · Max Marks: 100

View IOCL Junior Operator (Grade 1) 2026 Exam Page

To boost your performance in IOCL Junior Operator Grade 1 exam, practice each question regularly and with focus. Every question tests your subject understanding, so solve them one at a time. Taking a quiz improves your speed and accuracy. Practicing topic-wise MCQs. Students benefit greatly from reviewing questions with answer keys, which help clarify concepts and strengthen Questions knowledge for success in IOCL Junior Operator Grade 1 exams.

Latest IOCL Junior Operator Grade 1 Exam Question (Objective Questions), MCQ in English

Subjects : Professional Knowledge (Fitter), Numerical Abilities, Reasoning Abilities, General Awareness

Question Bank IOCL Junior Operator Grade 1 Exam (Fitter) - English

Professional Knowledge (Fitter)

Q 1 :
Which tool is used to cut external threads?
  1. A.Die
  2. B.Tap
  3. C.Chisel
  4. D.Reamer
Q 2 :
What is the purpose of a reamer?
  1. A.Cutting threads
  2. B.Finishing holes
  3. C.Cutting grooves
  4. D.Sharpening tools
Q 3 :
A hacksaw is used for:
  1. A.Cutting metal
  2. B.Cutting wood
  3. C.Drilling
  4. D.Filing
Q 4 :
What is the function of a centre punch?
  1. A.Marking the centre of a hole before drilling
  2. B.Cutting threads
  3. C.Scraping metal
  4. D.Smoothing surfaces
Q 5 :
The term "pitch" in threads refers to:
  1. A.The diameter of the thread
  2. B.The distance between adjacent threads
  3. C.The depth of the thread
  4. D.The material of the thread
Q 6 :
Which tool is used for making internal threads?
  1. A.Tap
  2. B.Die
  3. C.File
  4. D.Drill
Q 7 :
A bench vice is used for:
  1. A.Holding workpieces
  2. B.Cutting metal
  3. C.Drilling holes
  4. D.Measuring dimensions
Q 8 :
Which material is commonly used for making cutting tools?
  1. A.Mild steel
  2. B.High-speed steel
  3. C.Copper
  4. D.Aluminium
Q 9 :
Which file is used for rough filing?
  1. A.Smooth file
  2. B.Bastard file
  3. C.Dead smooth file
  4. D.Half-round file
Q 10 :
Which of the following is used for checking the flatness of a surface?
  1. A.Surface plate
  2. B.Try square
  3. C.Caliper
  4. D.Micrometer
Q 11 :
A micrometer measures in:
  1. A.Millimeters
  2. B.Microns
  3. C.Centimeters
  4. D.Inches
Q 12 :
A scriber is used for:
  1. A.Cutting threads
  2. B.Marking lines on metal surfaces
  3. C.Drilling holes
  4. D.Cutting metal
Q 13 :
What does the term "clearance fit" refer to?
  1. A.A fit where parts are press-fitted
  2. B.A fit where there is a small gap between parts
  3. C.A fit where parts are interference-fitted
  4. D.A fit where parts do not come into contact
Q 14 :
Which of the following is a marking tool?
  1. A.Chisel
  2. B.File
  3. C.Scriber
  4. D.Reamer
Q 15 :
A vernier caliper is used for measuring:
  1. A.Lengths
  2. B.Angles
  3. C.Surface roughness
  4. D.Thread pitch
Q 16 :
A tap wrench is used for:
  1. A.Drilling holes
  2. B.Holding taps
  3. C.Cutting threads
  4. D.Filing
Q 17 :
Which type of file is used for finishing curved surfaces?
  1. A.Flat file
  2. B.Round file
  3. C.Half-round file
  4. D.Triangular file
Q 18 :
In a micrometer, the thimble rotates around the:
  1. A.Spindle
  2. B.Anvil
  3. C.Frame
  4. D.Sleeve
Q 19 :
Which part of a micrometer holds the object being measured?
  1. A.Spindle
  2. B.Anvil
  3. C.Sleeve
  4. D.Thimble
Q 20 :
What is the primary purpose of a surface gauge?
  1. A.Checking the depth of a hole
  2. B.Marking out lines parallel to a reference surface
  3. C.Measuring diameters
  4. D.Cutting grooves
Q 21 :
The hardness of a file is measured in terms of:
  1. A.HRC
  2. B.BHN
  3. C.Vickers
  4. D.Mohs scale
Q 22 :
A feeler gauge is used to measure:
  1. A.Thickness of gaps
  2. B.Diameter of holes
  3. C.Angle of a surface
  4. D.Depth of grooves
Q 23 :
In a fitting shop, what is the purpose of a prick punch?
  1. A.Light marking of drill centers
  2. B.Heavy marking for chiseling
  3. C.Rough filing
  4. D.Thread cutting
Q 24 :
What is the advantage of using a Vernier height gauge?
  1. A.Measuring large heights accurately
  2. B.Checking thread depth
  3. C.Measuring thread pitch
  4. D.Measuring the internal diameter of holes
Q 25 :
A hand reamer is used for:
  1. A.Enlarging existing holes
  2. B.Tapping threads
  3. C.Cutting new holes
  4. D.Grinding surfaces
Q 26 :
Which part of the hacksaw holds the blade?
  1. A.Frame
  2. B.Handle
  3. C.Teeth
  4. D.Nose
Q 27 :
A surface plate is primarily used for:
  1. A.Grinding surfaces
  2. B.Holding workpieces
  3. C.Checking flatness
  4. D.Cutting threads
Q 28 :
What is the main purpose of using an engineer’s square?
  1. A.Checking angles
  2. B.Measuring lengths
  3. C.Cutting grooves
  4. D.Marking drill points
Q 29 :
Which type of tap is used for the final finishing of threads?
  1. A.Bottoming tap
  2. B.Taper tap
  3. C.Plug tap
  4. D.Hand tap
Q 30 :
Which tool is used to deburr sharp edges after drilling or cutting?
  1. A.Scraper
  2. B.File
  3. C.Chisel
  4. D.Tap
Q 31 :
What is the main function of a marking gauge?
  1. A.Scribing lines parallel to a reference edge
  2. B.Cutting grooves
  3. C.Measuring diameters
  4. D.Checking flatness
Q 32 :
In threading, what does "TPI" stand for?
  1. A.Threads per inch
  2. B.Total pitch index
  3. C.Thickness per inch
  4. D.Thread point interval
Q 33 :
Which type of file is used for filing keyways and narrow slots?
  1. A.Flat file
  2. B.Needle file
  3. C.Triangular file
  4. D.Square file
Q 34 :
The shank of a reamer is used for:
  1. A.Cutting material
  2. B.Holding the reamer
  3. C.Measuring depth
  4. D.Checking angles
Q 35 :
What is the purpose of a twist drill?
  1. A.Drilling holes in metal
  2. B.Cutting grooves
  3. C.Measuring angles
  4. D.Marking metal surfaces
Q 36 :
The angle between the cutting edge and the face of a tool is called:
  1. A.Clearance angle
  2. B.Rake angle
  3. C.Relief angle
  4. D.Inclination angle
Q 37 :
A file with very fine teeth is called:
  1. A.Dead smooth file
  2. B.Bastard file
  3. C.Second-cut file
  4. D.Round file
Q 38 :
The length of a hacksaw blade is measured between:
  1. A.The teeth
  2. B.The frame
  3. C.The pins that hold the blade
  4. D.The handle
Q 39 :
The hardness of a material is typically measured using:
  1. A.Tensile test
  2. B.Rockwell hardness test
  3. C.Impact test
  4. D.Compression test
Q 40 :
Which type of caliper is used for measuring external diameters?
  1. A.Outside caliper
  2. B.Inside caliper
  3. C.Vernier caliper
  4. D.Divider caliper
Q 41 :
The process of removing small amounts of material to obtain a smooth finish is called:
  1. A.Reaming
  2. B.Filing
  3. C.Lapping
  4. D.Tapping
Q 42 :
Which tool is used for checking the alignment of two holes?
  1. A.Try square
  2. B.Dowel pin
  3. C.Alignment pin
  4. D.Thread gauge
Q 43 :
What is the function of a spring divider?
  1. A.Marking circles or arcs
  2. B.Measuring internal diameters
  3. C.Measuring depth
  4. D.Scribing straight lines
Q 44 :
What is the most important safety gear in a workshop?
  1. A.Gloves
  2. B.Safety glasses
  3. C.Earplugs
  4. D.Hard hat
Q 45 :
What should you do before using a machine in the workshop?
  1. A.Read the manual
  2. B.Check the machine for any visible damage
  3. C.Ensure the work area is clean
  4. D.All of the above
Q 46 :
What is the proper way to lift heavy objects?
  1. A.Bend your back
  2. B.Use your legs to lift
  3. C.Use only your arms
  4. D.Ask someone else to lift it
Q 47 :
What should you do if you see a spill on the workshop floor?
  1. A.Walk around it
  2. B.Report it to a supervisor
  3. C.Clean it up immediately
  4. D.Ignore it
Q 48 :
Which of the following is a common cause of accidents in a workshop?
  1. A.Lack of concentration
  2. B.Following safety rules
  3. C.Using the correct tools
  4. D.Wearing proper PPE
Q 49 :
What should you do if a machine malfunctions?
  1. A.Try to fix it yourself
  2. B.Continue using it carefully
  3. C.Turn it off and report it
  4. D.Ignore the problem
Q 50 :
Why is it important to wear ear protection in noisy environments?
  1. A.To avoid ear infections
  2. B.To prevent hearing damage
  3. C.To block out distractions
  4. D.To look professional

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