Production Engineering Set 8

Mechanical Engineering

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This set of Production Engineering Multiple Choice Questions & Answers (MCQs) focuses on Production Engineering Set 8

Q1 | The minimum section thickness for cast iron castings is
  • 10 mm
  • Parting off
  • 3 mm
  • 1 mm
  • 6 mm
Answer: 3 mm
Q2 | When large number of components are turned and parted off from a bar, the chuck used is
  • Magnetic chuck
  • Four jaw chuck
  • Collet chuck
  • Face place
  • Three jaw chuck
Answer: Collet chuck
Q3 | Which of the following plate can be used for milling the sides of a hexagon nut?
  • Parting off
  • 3 hole circle plate
  • 45 hole circle plate
  • 55 hole circle plate
  • 24 hole circle plate
Answer: 24 hole circle plate
Q4 | Stub tooth are cut on gears
  • To improve transmission efficiency
  • To reduce centre distance between shafts
  • None of above
  • To reduce frictional torque
  • Subjected to shock and vibration
Answer: Subjected to shock and vibration
Q5 | Porosity of a welded joint may be caused by
  • Poor base metal
  • Low welding current
  • High welding current
  • Wrong size of electrode
  • None of the above
Answer: Poor base metal
Q6 | Ionised material acts as transfer media in case of
  • Ion beam machining
  • Plasma arc machining
  • Electro discharge machining
  • All of the above
  • None of the above
Answer: All of the above
Q7 | Scale sensitivity is defined as
  • Ratio of a change in scale reading to the corresponding change in pointer deflection
  • Least reading of scale/range of scale
  • Least reading of scale/unit measurable quantity
  • Least count of scale/range of scale
  • None of the above
Answer: Ratio of a change in scale reading to the corresponding change in pointer deflection
Q8 | Which one does not fit with the rest in the following
  • Hammer
  • Flatter
  • Hot chiesel
  • Reamer
  • Hot punch
Answer: Reamer
Q9 | Kerosene is used as a cutting fluid while machining
  • Magnesium
  • Low carbon steel
  • Copper
  • Brass
  • Aluminium
Answer: Aluminium
Q10 | Out of the following tools which one is expected to have highest carbon percentage
  • Crowbar
  • Ordinary file
  • Circular saw
  • Pliers
  • Wrenches
Answer: Ordinary file
Q11 | For welding of non-ferrous materials which of the following is preferred?
  • Microwave frequency voltage
  • Low frequency ac
  • High frequency ac
  • Direct current
  • Induction heating
Answer: Direct current
Q12 | As far as machinability is concerned, which of the following will be considered to be most inferior alloy?
  • Malleable cast iron
  • Parting off
  • Monel metal
  • Gun metal
  • Bearing bronze
Answer: Monel metal
Q13 | Precision is
  • The ability of a measuring device to detect small differences in a quantity being measured
  • Agreement of the result of a measurement with the true value of the measured quantity
  • The ability of an instrument to reproduce same reading under identical conditions
  • The repeatability of a measurement process
  • Error of judgment in reading on observation
Answer: The repeatability of a measurement process
Q14 | In centrifugal castings, the cores are generally made of
  • Green sand and molasses
  • Plastic
  • Wax
  • Cores are not used
  • Plaster of paris
Answer: Cores are not used
Q15 | In orthogoual cutting of metals the cutting edge is
  • Perpendicular to the direction of tool travel
  • Perpendicular to the work piece
  • Perpendicular to the shear plane
  • Perpendicular to the axis of cutting tool
  • None of the above
Answer: Perpendicular to the direction of tool travel
Q16 | Hardest abrasive is
  • Aluminium oxide
  • Silicon carbide
  • Boron carbide
  • Diamond
  • Tungsten oxide
Answer: Diamond
Q17 | Riser is generally located
  • near the parting line
  • on the upper most section of the casting
  • Parting off
  • opposite to the pouring end
  • near the deepest section of the mould
Answer: on the upper most section of the casting
Q18 | Which of the following test can be used to detect surface cracks in the welding of non-magnetic alloys?
  • Fluorescent test
  • Gamma ray test
  • X-ray test
  • Magnaflux test
  • Any of the above
Answer: Fluorescent test
Q19 | Which of the following process has the lowest rate of metal removal?
  • Electron beam machining
  • Electro discharge machining
  • Abrasive jet machining
  • Electro chemical machining
  • Chemical machining
Answer: Abrasive jet machining
Q20 | Which of the following machine is likely to be extensively used in a workshop manufacturing wire nails?
  • Lathe
  • Broaching machine
  • Drilling machine
  • Power press
  • Cold heading machine
Answer: Cold heading machine
Q21 | Shearing strain in the chip at shear plane is
  • tan (? + ?) + cot ?
  • tan (? - ?) - tan ?
  • Infinite clearance
  • tan (? - ?) + cot ?
  • tan (? - ?) + tan ?
Answer: tan (? - ?) + cot ?
Q22 | Which of the following is the most common bond used in grinding wheels?
  • Shellac bond
  • Pakelite bond
  • Parting off
  • Rubber bond
  • Vitrified bond
Answer: Vitrified bond
Q23 | The grain size of moulding sand is expressed in terms of
  • Mean grain diameter
  • Seive number
  • Grain diameter
  • Grain density
  • Grain fitness number
Answer: Grain fitness number
Q24 | Refractory metals are
  • Those which can be cast in the form of bricks
  • Those which reflect heat
  • Those which have melting point above 1950?C
  • Those which absorb heat
  • Those do not malt in a normal furnace
Answer: Those which have melting point above 1950?C
Q25 | Press die life is gauged by
  • loss in weight
  • amount of burr produced
  • change of colour
  • Any of the above
  • Parting off
Answer: amount of burr produced
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