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Latest MPESB ITI Training Officer Refrigeration and Air Conditioning Exam Question (Objective Questions), MCQ in English

Subjects : Professional Knowledge, Science & Maths, General Knowledge, Logical Reasoning, Basic Computer wledge

Question Bank MPESB ITI Training Officer (Refrigeration and Air Conditioning) Exam - English
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Professional Knowledge

Question 1Single Answer
The most important personal protective equipment (PPE) to be worn while grinding in the RAC workshop is?
  1. A
    Cotton gloves
  2. B
    Safety goggles
  3. C
    Leather apron
  4. D
    Ear plugs
Question 2Single Answer
Which colour of helmet is mandatory for supervisors in an industrial workshop as per factory safety norms?
  1. A
    Green
  2. B
    Yellow
  3. C
    Red
  4. D
    White
Question 3Single Answer
The first action to be taken in case of electric shock to a person is?
  1. A
    Pour water on the victim
  2. B
    Give artificial respiration
  3. C
    Disconnect the power supply immediately
  4. D
    Call the doctor first
Question 4Single Answer
The class of fire caused by burning of electrical equipment is classified as?
  1. A
    Class A
  2. B
    Class E
  3. C
    Class B
  4. D
    Class C
Question 5Single Answer
While working with refrigerant cylinders, the most important safety precaution is to?
  1. A
    Open valve fully always
  2. B
    Keep it near furnace
  3. C
    Drop it from height
  4. D
    Never expose the cylinder to direct sunlight or heat
Question 6Single Answer
The colour code of oxygen cylinder used in oxy-acetylene welding is?
  1. A
    White
  2. B
    Maroon
  3. C
    Black
  4. D
    Red
Question 7Single Answer
The colour code of acetylene cylinder is?
  1. A
    White
  2. B
    Black
  3. C
    Maroon
  4. D
    Green
Question 8Single Answer
The maximum safe working pressure for oxygen cylinder is usually kept at?
  1. A
    50 bar
  2. B
    250 bar
  3. C
    150 bar
  4. D
    10 bar
Question 9Single Answer
While filing a job in the vice, the file should be held with?
  1. A
    Only left hand
  2. B
    Only right hand
  3. C
    Both hands – handle in right hand, point in left
  4. D
    One finger grip
Question 10Single Answer
The type of file used for finishing and smooth surface is?
  1. A
    Bastard file
  2. B
    Smooth file
  3. C
    Rough file
  4. D
    Second cut file
Question 11Single Answer
The angle between cross-cut teeth and the axis of a file is called?
  1. A
    Helix angle
  2. B
    Clearance angle
  3. C
    Rake angle
  4. D
    No angle
Question 12Single Answer
While marking on a job, the scriber should be held at an angle of?
  1. A
    0°
  2. B
    90°
  3. C
    45°
  4. D
    15° to the surface
Question 13Single Answer
The tool used for checking right angles on a job is?
  1. A
    Vernier caliper
  2. B
    Steel rule
  3. C
    Try square
  4. D
    Micrometer
Question 14Single Answer
The least count of a standard steel rule used in fitting shop is?
  1. A
    0.5 mm
  2. B
    1 mm
  3. C
    0.02 mm
  4. D
    0.1 mm
Question 15Single Answer
The tool used for cutting internal threads is?
  1. A
    Die
  2. B
    Tap
  3. C
    Reamer
  4. D
    Drill
Question 16Single Answer
The tool used for cutting external threads is?
  1. A
    Tap
  2. B
    Die
  3. C
    File
  4. D
    Punch
Question 17Single Answer
The size of tap is designated by?
  1. A
    Minor diameter
  2. B
    Pitch
  3. C
    Major diameter of thread
  4. D
    Core diameter
Question 18Single Answer
While tapping a hole, the tap should be rotated?
  1. A
    ½ turn forward and ¼ turn backward
  2. B
    Continuous forward
  3. C
    Continuous backward
  4. D
    No rotation
Question 19Single Answer
The cutting angle of a drill bit for general purpose drilling in mild steel is?
  1. A
    118°
  2. B
    90°
  3. C
    135°
  4. D
    60°
Question 20Single Answer
The helix angle of a standard twist drill is?
  1. A
    60°
  2. B
    45°
  3. C
    10°
  4. D
    20°–30°
Question 21Single Answer
The tool used for enlarging an existing hole accurately is?
  1. A
    Die
  2. B
    Drill
  3. C
    Tap
  4. D
    Reamer
Question 22Single Answer
The clearance angle of a drill bit is usually?
  1. A
    15°
  2. B
    8°–12°
  3. C
    5°
  4. D
    20°
Question 23Single Answer
While drilling a hole in sheet metal, the drill should be?
  1. A
    Rotated fast only
  2. B
    Fed heavily
  3. C
    Fed slowly with light pressure
  4. D
    No feed
Question 24Single Answer
The most suitable file for removing heavy material quickly is?
  1. A
    Dead smooth file
  2. B
    Smooth file
  3. C
    Second cut file
  4. D
    Rough file
Question 25Single Answer
The grade of file having 45–60 teeth per 25 mm is?
  1. A
    Bastard file
  2. B
    Second cut file
  3. C
    Smooth file
  4. D
    Dead smooth file
Question 26Single Answer
While sawing with hacksaw, the teeth should face?
  1. A
    Upward
  2. B
    Backward
  3. C
    Forward direction
  4. D
    Downward
Question 27Single Answer
The number of teeth per 25 mm in a hacksaw blade for general purpose is?
  1. A
    14–18
  2. B
    24–32
  3. C
    10–12
  4. D
    6–8
Question 28Single Answer
The correct tension of hacksaw blade is checked by?
  1. A
    Very tight
  2. B
    Loose blade
  3. C
    Pressing with thumb – slight spring back
  4. D
    No tension
Question 29Single Answer
In sheet metal work, the tool used for cutting straight lines is?
  1. A
    Curved snips
  2. B
    Straight snips
  3. C
    Universal snips
  4. D
    Aviation snips
Question 30Single Answer
The tool used for cutting curves in sheet metal is?
  1. A
    Straight snips
  2. B
    Curved snips / aviation snips
  3. C
    Hacksaw
  4. D
    File
Question 31Single Answer
The operation of bending sheet metal along a straight line is called?
  1. A
    Seaming
  2. B
    Folding
  3. C
    Hemming
  4. D
    Bending
Question 32Single Answer
The tool used for bending sheet metal accurately is?
  1. A
    File
  2. B
    Hammer only
  3. C
    No tool
  4. D
    Bench vice and mallet / sheet metal brake
Question 33Single Answer
In sheet metal, single hem is used to?
  1. A
    Increase thickness
  2. B
    Join two sheets
  3. C
    No use
  4. D
    Strengthen the edge and remove sharp edge
Question 34Single Answer
The joint formed by folding edges of two sheets over each other is called?
  1. A
    Lap joint
  2. B
    Riveted joint
  3. C
    Seam joint
  4. D
    Welded joint
Question 35Single Answer
The common rivet used in sheet metal ducting is?
  1. A
    Pan head rivet
  2. B
    Counter sunk rivet
  3. C
    Tinman’s rivet (snap head)
  4. D
    Mushroom head
Question 36Single Answer
The diameter of rivet is usually?
  1. A
    1.5 to 2 times thickness of sheet
  2. B
    Equal to thickness
  3. C
    Half thickness
  4. D
    No rule
Question 37Single Answer
The pitch of rivets in a single riveted lap joint is?
  1. A
    3d to 4d
  2. B
    1d
  3. C
    6d
  4. D
    2d
Question 38Single Answer
The operation of making a hole in sheet metal before riveting is?
  1. A
    Punching
  2. B
    Drilling
  3. C
    No hole
  4. D
    Both
Question 39Single Answer
Soldering is done at temperature below?
  1. A
    200 °C
  2. B
    800 °C
  3. C
    1000 °C
  4. D
    450 °C
Question 40Single Answer
The common solder used in HVAC ducting is?
  1. A
    Silver solder
  2. B
    Tin-lead solder (50:50 or 60:40)
  3. C
    Brazing filler
  4. D
    No solder
Question 41Single Answer
The flux used in soft soldering is?
  1. A
    No flux
  2. B
    Borax
  3. C
    Zinc chloride or resin
  4. D
    Acid only
Question 42Single Answer
The tool used for applying solder in sheet metal work is?
  1. A
    Blow lamp
  2. B
    Soldering iron / bit
  3. C
    Welding torch
  4. D
    No tool
Question 43Single Answer
The temperature of soldering iron bit should be?
  1. A
    100 °C
  2. B
    500 °C
  3. C
    250–350 °C
  4. D
    700 °C
Question 44Single Answer
The joint strength in soldering is mainly due to?
  1. A
    No strength
  2. B
    Fusion
  3. C
    Capillary action and adhesion
  4. D
    Mechanical lock
Question 45Single Answer
In HVAC ducting, the longitudinal seam is usually?
  1. A
    Pittsburgh lock seam
  2. B
    Lap joint
  3. C
    Butt joint
  4. D
    Riveted joint
Question 46Single Answer
The transverse seam in rectangular duct is commonly?
  1. A
    Soldered
  2. B
    Welded
  3. C
    No seam
  4. D
    Cleat joint or S & drive cleat
Question 47Single Answer
The minimum thickness of GI sheet used for HVAC ducting up to 600 mm size is?
  1. A
    24 gauge (0.6 mm)
  2. B
    18 gauge
  3. C
    30 gauge
  4. D
    16 gauge
Question 48Single Answer
The zinc coating on GI sheet protects against?
  1. A
    Heat
  2. B
    Corrosion
  3. C
    No protection
  4. D
    Rust only
Question 49Single Answer
The angle used for elbow in rectangular duct is usually?
  1. A
    60°
  2. B
    45°
  3. C
    90°
  4. D
    30°
Question 50Single Answer
The turning vanes in duct elbow are provided to?
  1. A
    Reduce pressure loss and turbulence
  2. B
    Increase velocity
  3. C
    No vanes
  4. D
    Increase noise
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