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This set of Foundry Technology Multiple Choice Questions & Answers (MCQs) focuses on Foundry Technology Set 5
Q1 | Shell patterns are often used for
- pipe work
- bends
- drainage fittings
- all of the above
Q2 | In carbondioxide moulding the pressure of carbondioxide is around
- 500 kg/cm2
- 1.5 kg/cm2
- 15 kg/cm2
- 150 kg/cm2
Q3 | As compared to green sand in shell moulding cooling rate of cast metal is slow. Hence as compared to green sand castings, shell moulded castings will have
- larger grain size
- smaller grain size
Q4 | Which of the following cast iron is resistant to attack by sea water?
- Low nickel cast iron
- Low sulphur cost iron
- Low chromium cast iron
- Low phosphorous cast iron
Q5 | Shaving of die casted parts is the process of removal of
- sprue
- flash
- runner
- none of the above
Q6 | The lower portion of the moulding flasks are known as
- Cheek
- Cope
- Drag
Q7 | Molybdenum upto 1.5% is added to cast iron to
- improve strength
- reduce wear resistance
- increase machinability
- all of the above
Q8 | A pit furnace can be used for the melting of
- cast iron
- brass
- aluminium
- all of the above
Q9 | Which of the following operations improve wear resistance and mechanical properties of castings?
- Shot peening
- Chilling
- Nitriding
- All of the above
Q10 | Metal moulds are used in all of the following EXCEPT
- Investment casting
- Permanent mould casting
- Centrifugal casting
- Die casting process
Q11 | Which of the following is used to increase refractoriness of sand?
- Graphite
- Silica flour
- Iron free zirconium
- all of the above
Q12 | Alloy containing 70% nickel and 30% copper is known as
- hastalloy
- permalloy
- monel metal
- N-c alloy
Q13 | Generally for the melting of cast iron, electric furnaces are not used because
- cast iron is in the form of broken pieces
- It is expensive to use electricity for melting of cast iron
- the rate of heating required for melting cast iron connot be provided by electric furnaces
- cast iron requires higher temperature for heating
Q14 | Which variety of cast iron can be forged?
- Grey cast iron
- High silicon cast iron
- Wrought iron
- All of the above
Q15 | The solidification shrinkage of magnesium alloys is about
- 4 percent
- 1 percent
- 0.1 percent
- 14 percent
Q16 | The drawback with metallic pattern is
- excessive weight
- expensive
- difficult to shape
- all of the above
Q17 | Which of the following is a screen?
- Shovel
- Slick
- Riddle
- Rearner
Q18 | The property of the foundry sand which enables it to adhere to the surface of other materials is termed
- Cohesiveness
- Adhesiveness
- Either of (A) or (B)
Q19 | A cupola one metre in diameter and 4 metres in height will melt in one hour about
- 0.5 tonnes of iron
- 10 tonnes of iron
- 5 tonnes of iron
- 2 tonnes of iron
Q20 | Pure iron melts at 1500?C. Presence of carbon
- does not change the melting point
- reduces the melting point
- increases the melting point
Q21 | For producing several similar parts from a single mould the moulding used is
- bench moulding
- floor moulding
- plate moulding
- none of the above
Q22 | A blind riser can be located
- in cheek only
- in either cope or drag
- in drag
- in cope
Q23 | Use of flux in melting of magnesium
- separates out impurities
- prevents burning of magnesium alloys
- facilitates production of sound cstings
- all of the above
Q24 | A blast furnace operates continuously for
- weeks together
- days together
- hours together
- months together
Q25 | When external features of the castings are important, which of the following method of casting is preferred?
- Die casting
- Slush casting
- Carbondioxide casting
- Dry sand casting