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০০। A basic shaft is one whose
- ক) lower deviation is zero
- খ) upper deviation is zero
- গ) lower and upper deviations are zero
- ঘ) none of these
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০১। A casting defect which occurs due to improper venting of sand is known as
- ক) cold shuts
- খ) blow holes
- গ) shift
- ঘ) swell
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০২। A casting defect which occurs near the ingates as rough lumps on the surface of a casting is known as
- ক) shift
- খ) sand wash
- গ) swell
- ঘ) scab
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০৩। A casting defect which results in general enlargement of a casting is known as
- ক) shift
- খ) sand wash
- গ) swell
- ঘ) scab
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০৪। A diamond pointed chisel is used for cutting
- ক) flat surfaces
- খ) grooves
- গ) keyways
- ঘ) V-shaped grooves
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০৫। A file removes the metal during
- ক) forward stroke
- খ) return stroke
- গ) both forward and return strokes
- ঘ) none of these
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০৬। A file with 20 teeth in 25 mm is called
- ক) rough file
- খ) bastard file
- গ) second cut file
- ঘ) smooth file
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০৭। A file with 50 - 60 teeth in 25 mm is called bastard file.
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০৮। A gimlet is a __________ tool.
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০৯। A hacksaw blade cuts on the
- ক) forward stroke
- খ) return stroke
- গ) both forward and return strokes
- ঘ) cutting depends upon the direction of force
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১০। A hacksaw blade is specified by its
- ক) length
- খ) material
- গ) width
- ঘ) number of teeth
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১১। A jolt machine is used to
- ক) ram the sand harder at the pattern face with decreasing hardness towards the back of the mould
- খ) ram the sand harder at the back of the mould and softer on the pattern face
- গ) produce uniform sand hardness throughout the mould
- ঘ) produce uniform packing of sand in the mould
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১২। A large electrode is used in un-shielded arc welding.
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১৩। A mortise gauge is a
- ক) striking tool
- খ) planing tool
- গ) boring tool
- ঘ) marking tool
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১৪। A moving mandrel is used in
- ক) wiredrawing
- খ) tube drawing
- গ) metal cutting
- ঘ) forging
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১৫। A neutral flame is obtained by supplying
- ক) equal volumes of oxygen and acetylene
- খ) more volume of oxygen and less volume of acetylene
- গ) more volume of acetylene and less volume of oxygen
- ঘ) none of the above
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১৬। A pattern is used to make the mould cavity for pouring the molten metal for casting.
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১৭। A pattern maker‘s shrinkage rule considers
- ক) all pattern allowances
- খ) only shrinkage allowance
- গ) all materials to be cast
- ঘ) all materials of the pattern
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১৮। A plug gauge is used to check the diameter of shafts and studs.
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১৯। A pouring basin acts as a reservoir for the molten metal.