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This set of Foundry Technology Multiple Choice Questions & Answers (MCQs) focuses on Foundry Technology Set 6
Q1 | The disadvantage of hot blast cupola is
- low coke consumption
- reduced silicon loss
- reduced output silicon loss
- all of the above
Q2 | Addition of saw dust to moulding sand increases its
- gas permeability
- refractoriness
- cohesiveness
- all of the above
Q3 | Swab is used for
- applying water to the mould around the edge of the pattern
- shaking pattern to facilitate its with drawl from the mould
- repairing and finishing of mould
- none of the above
Q4 | For annealing of aluminium it is heated to
- 625?C
- 325?C
- 525?C
- 425?C
Q5 | In case of consumable patterns
- labour charges are reduced
- core is not required
- moulds are unsplit
- all of the above
Q6 | The burnt on sand causes difficulty in
- machining of castings
- removal of castings from moulds
- separation of sand and castings after pouring
- all of the above
Q7 | The melting unit is an integral part of
- the cold chamber diecastings machine
- the hot chamber die casting machine
- both (A) and (B) above
Q8 | Refractories should have all the following properties EXCEPT
- Long life
- Heat insulation
- High electrical conductivity
- Minimum contraction and expansion due to temperature variations
Q9 | Heating of core is necessary while using which of the following core binder?
- Phenol formaldehyde resin
- Phenolic alcohols
- Furan-base binder
- All of the above
Q10 | Which of the following metals has the lowest melting point?
- Magnesium
- Aluminium
- Silver
- Brass
Q11 | Which of the following statement about core is incorrect?
- core should be capable of collapsing after the molten metal has solidified around it
- core should produce maximum amount of gas when in contact with molten metal
- core should be capable of collapsing shortly after the molten metal has solidified around it
- core should be permeable to escape of core gases
Q12 | Rammer used for moulding the sand in large mould known as
- Hand rammer
- Peen rammer
- Floor rammer
Q13 | All of the following operations on castings are carried out for surface appearance improvement EXCEPT
- Galvanising
- Chilling
- Electroplating
- Enamelling
Q14 | Wax patterns are used in
- non-ferrous castings
- investment casting process
- machine moulding process
- all of the above
Q15 | In copper alloy foundry which of the following is used to prevent the molten metal from being oxidized?
- phophorous
- bone ash
- calcium carbonate
- charcoal
Q16 | While selecting wood for patterns, one should
- discard the rot
- discard the seasoned wood
- select the fresthy filled wood
- select the cross-grained woods
Q17 | A spoke shave is a
- planing tool
- sawing tool
- boring tool
- layout tool
Q18 | Oil used for core sand is
- molasses
- linseed oil
- mineral oil
- any of the above
Q19 | The percentage of sulphur in pig iron is generally
- 0.8% to 0.9%
- 0.01% to 0.3%
- 0.3% to 0.55%
- 0.6% to 0.79%
Q20 | Solidification time for riser should be
- less than that of the casting
- same as that for the casting
- more than that of the casting
Q21 | Which of the following is very powerful carbide former in cast iron?
- Chromium
- Nickel
- Vanadium
- Silicon
Q22 | Sweep patterns are used to prepare mould of
- symmetrical and regular shapes
- unsymmetrical and regular shapes
- unsymmetrical and irregular shapes
- none of the above
Q23 | For aluminium alloys grain refinement can be achieved using
- titanium
- boron
- zirconium
- any of the above
Q24 | Pneumatic tools find application in foundries normally for
- fin removal
- surface finish
- filling of cavities
- none of the above
Q25 | Which parameter can be used for the measurement of melt in a foundry?
- Thermo couple pyrometer
- Optical pyrometer
- Radiation pyrometer
- none of the above