Foundry and Pattern Making
1.
What is meant by drag in casting process?
a. Upper
part of casting flask
b. Molten metal
c. Lower part of casting
flask
d. Upper and lower part of
casting flask
|
ANSWER: (c) |
2.
Casting
replica used to make the cavity is called as
a. Mould
b. Pattern
c. Cope
d. None of the above
|
ANSWER: (b) |
3.
Blast
furnace produces following by reduction of iron ore
(a) cast iron
(b) pig iron
(c) wrought iron
(d) malleable iron
Ans: (b)
4.
Cupola
produces following material
a) cast iron
(b) pig iron
(c) wrought iron
(d) malleable iron
Ans: (a)
5.
How is the die used in injection molding cooled?
a) Oil
b) Air
c) Water
d) Contact with cold surface
Answer: c
6.
Where does the granular molding material get loaded into?
a) Barrel
b) Hopper
c) Pellets
d) Split
Answer: b
7.
Which of
the following material is not made by injection molding?
a)
Nuts
b)
Tubes
c)
Car handles
d)
Electrical fittings
Answer: b
8.
What is
the minimum temperature allowed to be given to the injection molding process?
a) 120°C
b) 130°C
c) 140°C
d) 150°C
Answer: d
9.
Which of the following factors is not considered in a ram type injection
molding?
a) Inner pressure of material
b) Outer pressure of material
c) Volume of material
d) Temperature of material
Answer: c
10. What is the minimum pressure
allowed to be given to the injection molding process?
a) 90 MPa
b) 100 MPa
c) 140 MPa
d) 170 MPa
Answer: b
11. What is the maximum temperature
allowed to be given to the injection molding process?
a) 300°C
b) 320°C
c) 350°C
d) 400°C
Answer: a
12. The barrel is used for the
opening and closing of the mold.
a) True
b) False
Answer: b
13. There is a varied pressure
provided in the solidification unit of injection molding process.
a) True
b) False
Answer: b
14. Which of the following is not a
type of a foundry?
a) Captive foundry
b) Jobbing foundry
c) Semi Production foundry
d) Auto production foundry
Answer: d
15. Which of the following is a
ferrous foundry?
a) Brass foundry
b) Bronze foundry
c) High alloy steel foundry
d) Zinc-base foundry
Answer: c
16. In an automobile engine, up to
what percent of parts are manufactured by casting?
a) 65%
b) 75%
c) 80%
d) 90%
Answer: d
17. Casting provides uniform
directional properties.
a) True
b) False
Answer: a
18. Products made through casting can
avoid joining process.
a) True
b) False
Answer: a
19. What is the shape of a rotary
melting furnace?
a) Spherical
b) Cylindrical
c) Cuboidal
d) Hemi-spherical
Answer: b
20. What is the speed of rotation of
a rotary melting furnace?
a) 0.5 rpm
b) 1 rpm
c) 2 rpm
d) 3 rpm
Answer: b
21. After how many heats, should the
refractory lining be renewed?
a) 50-100
b) 100-200
c) 200-300
d) 300-40
Answer: c
22. The rotary furnace can have a
capacity of 80 tons.
a) True
b) False
Answer: b
23. Which of the following statement
is true?
a) Casting is the replica of the object to be cast
b) Pattern is the replica of the casting object
c) Casting and the pattern are same things
d) Molten material is casted into the casting cavity
Answer: b
24. Which of the following carries
the mould cavity where the metal is to be poured?
a) Casting
b) Pattern
c) Sand
d) Core
Answer: b
25. Which of the following is ‘not’
an allowance given to the pattern for casting?
a) Shrinkage
b) Draft
c) Hole
d) Machining
Answer: c
26. What will be the machining
allowance for a bore of a 405mm cast iron object to be casted?
a) 1.0mm
b) 2.0mm
c) 3.0mm
d) 5.0mm
Answer: d
27. The quality of the final
product is not dependent on _______________
a) Method of withdrawal of pattern
b) Allowance provided to the pattern
c) The complexity of the casting
d) The metal used in Casting
Answer: d
28. The
life of a pattern is most likely to depend upon which of the following term?
a) Number of castings produced
b) Type of cooling rate of the casting
c) Size of the casting
d) Size of the pattern
Answer: a
29. What
is the function of cores in the casting process?
a) To support the pattern
b) To provide differential cooling rates at specific portions
c) To make holes and cavities
d) For ease of flow of the molten material
Answer: c
9. Which
of the following is ‘not’ an advantage of the usage of pattern in a casting of
metals?
a) Using patterns to cast objects, less time is consumed for mass production
b) It is cost efficient and profitable for mass production
c) Production of the pattern requires extra effort to cast the object
d) Cores in the pattern could be used to decrease the amount of machining done
for making cavities
Answer: c
10. A
draft allowance is provided to ___________
a) All linear faces
b) Only the interior dimensions
c) Only the exterior dimensions
d) Only the dimensions that are perpendicular to the parting plane
Answer: d
1. Which
of the following is not a part of the pattern at most times?
a) Mould cavity
b) Cope
c) Molten metal
d) Core
Answer: c
2. Which
of the following does not serve the purpose of using patterns in sand casting?
a) Contain core prints if the casting requires a core and need to be made
hollow
b) To give the exact shape and size (in addition to the allowances) to the
casting as that of the final object
c) Reduces the cost of production while used in mass production
d) Sometimes used to carry the mechanism to melt the metal/material which is to
be poured into the cavity
Answer: d
4. The
function of a gated pattern is ___________
a) To produce small castings in mass production
b) To create castings of a very heavy mass
c) To create castings containing complex design
d) To create symmetrical castings
Answer: a
5. Which
of the following factors affect the choice of a pattern at most times?
a) Size and complexity of the casting
b) Characteristics of castings
c) Type of molding and castings method to be used
d) Type of cooling rates to be provided
Answer: d
6. Which
of the following sequence is in the correct order to prepare a cast using the
sand casting method?
[1] Mould making [2] Clamping [3] Pouring [4] Cooling [5] Trimming [6] Removal
a) 1,3,2,4,6,5
b) 2,1,3,4,5,6
c) 1,2,3,4,5,6
d) 1,2,3,4,6,5
Answer: d
7. What
is a function of a riser in a sand casting?
a) Provide good mobility to the molten metal
b) Prevent cavities due to shrinkage
c) To develop holes or hollow cavities in the casting
d) To provide differential cooling rates in specific areas of the casting
Answer: b
8.
Runners, gates and risers are attached to the pattern to __________
a) Provide ease of cooling
b) Provide feed to the molten material
c) Provide design to the casting
d) Enhance the finishing of the casting
Answer: b
1.
Pattern cannot be constructed out of which of the following materials?
a) Wood
b) Wax
c) Oil
d) Metal
Answer: c
2. Which
of the following is not a criteria for selecting pattern materials?
a) Method of moulding
b) Establishment of parting line
c) Chances of repeat orders
d) Complexity of the casting
Answer: b
3. Which
among the following wood is most widely used for making patterns?
a) White Pine
b) Mahogany
c) Teak
d) Maple
Answer: a
4. Which
of the following is considered to be light wood?
a) Mahogany
b) Maple
c) Birch
d) White Pine
Answer: d
5. Steel
is an alloy of which two elements?
a) Iron and Brass
b) Brass and aluminium
c) Iron and carbon
d) Carbon and aluminium
Answer: c
6. Which
of the following is not a limitation of wooden patterns?
a) Get abraded easily
b) Absorb moisture
c) Difficult machining
d) Poor wear resistance
Answer: c
7. Metal
patterns have a longer life than wooden pattern.
a) True
b) False
Answer: a
8. Which
of the following is not a limitation of metal patterns?
a) Get rusted
b) Obtain rough surface finish
c) Expensive
d) Heavy
Answer: b
9. Which
of the following patterns do not withstand rough handling?
a) Aluminium
b) Cast iron
c) Brass
d) Steel
Answer: a
10. Which
of the following has the lowest melting point?
a) Cast Iron
b) Steel
c) White Metal
d) Brass
Answer: c
11. Which
of the following is the heaviest?
a) White
b) Brass
c) Cast Iron
d) Aluminium
Answer: b
12. In
Solid casting method, the resin mixture is kept for how much time for hardening
and curing?
a) 1-2 hours
b) 2-3 hours
c) 3-4 hours
d) 4-5 hours
Answer: b
13. Core
boxes are made out of which pattern?
a) Plaster pattern
b) Wax pattern
c) Metal patterns
d) Polystyrene patterns
Answer: a
14. What
should the sulphur level in foam plastic be?
a) More than 1%
b) Between 0.5% to 1%
c) Less than 0.1%
d) Between 0.1% to 0.5%
Answer: c
15. Which
of the following patterns has high compressive strength?
a) Plastic pattern
b) Wax pattern
c) Polystyrene pattern
d) Plaster pattern
Answer: d
1. The
designing of a pattern does not include which of the following feature?
a) To locate the direction of the parting line and adjust the component
accordingly
b) To determine regions and measurement of draft angles and radii of the sharp
edges where allowances are to be given
c) To recognize and abolish the region of or where the defects could take place
during casting
d) To 3D print the design for making the pattern
Answer: d
5. The
preferred shape of a runner in a sand casting is ___________
a) Cylindrical
b) Spherical
c) Rectangular
d) Trapezoidal
Answer: d
7. Riser
for a sand casting can be designed using ___________
a) Modulus method
b) Cained method
c) Naval research laboratory method
d) All of the mentioned
Answer: d
8. Rat
tails and buckles in sand casting are caused by __________
a) Lower strength of the solidified metal
b) Lower refractoriness of the moulding sand
c) Lower strength of the moulding sand
d) Lower hardness of the moulding sand
Answer: c
10.
Parting line in the sand casting should be ___________
a) Simple and curved
b) Simple and straight
c) Irregular
d) Any type will not make a difference
Answer: b
1. Which
of the following is not measuring, marking or layout tools?
a) Caliper
b) Trisquare
c) T-bevel
d) Compass Saw
Answer: d
2. Which
of the following tool is not used for clamping purpose?
a) C-clamp
b) Trammels
c) Bar clamp
d) Hand Vice
Answer: b
3. Which
of the following is not a sawing tool?
a) Coping saw
b) Pinch dog
c) Panel saw
d) Bow saw
Answer: b
4. Gimlet
is which of the following tool?
a) Clamping tools
b) Drilling tool
c) Sawing tool
d) Wood planing tool
Answer: b
5. Which
of the following is not a drilling or boring tool?
a) Brace
b) Counter sink bit
c) Auger bit
d) Hand vice
Answer: d
6. Which
of the following is not a wood planing tool?
a) Block plane
b) Scrub plane
c) Spokeshave
d) Centre bit
Answer: d
7. A
mallet comes under which type of tool?
a) Drilling tool
b) Clamping tool
c) Other pattern maker’s tool
d) Sawing tool
Answer: c
8. Which
of the following pattern making machine works on two pulleys?
a) Circular saw
b) Band saw
c) Wood turning lathe
d) Jig saw
Answer: b
9. Which
of the following pattern making machine makes wooden board?
a) Jointer
b) Drill press
c) Mortiser
d) Scroll saw
Answer: a
10. Disc
Sander is an abrasive type of machine.
a) True
b) False
Answer: a
1. Which
of the following properties must a material possess to be used in mold making?
a) High refractoriness
b) Chemical and thermal stability
c) High permeability
d) All of the mentioned
Answer: d
2. Which
of the following group of material type is used in mold making?
a) Metallic only
b) Non-Metallic only
c) Both metallic as well as non-metallic
d) Neither metallic nor non-metallic
Answer: c
3. Which
of the following non-metallic material is not used in the synthesis of molds?
a) Magnesite
b) Silimanite
c) Zircon
d) Valcanised rubber
Answer: d
4. High
refractoriness of a material refers to its __________
a) Slipperyness of the material
b) Chemical strength towards other material
c) Strength to withstand at high temperature
d) Ability to get dissolved in molten metal
Answer: c
5. Which
of the following is a perfect composition of clay (Bentonite) used in moulding
sand?
a) Al2O3
b) Al2O3.2SiO2
c) Al2O3.2H2O
d) Al2O3.2SiO2.2H2O
Answer: d
6. Which
of the following material is not used for mold making?
a) Iron
b) Zinc
c) Mild steel
d) Alloy steel
Answer: b
7.
Phosphorus is added to steel mold for which of the following reason?
a) It increases strength and hardness of steel
b) It increases refractoriness of steel
c) It increases porosity of steel
d) It increases finishing of steel
Answer: a
8. Which
of the following is a perfect composition for medium carbon steel?
a) Upto 0.3%
b) 0.3-0.6%
c) 0.6-1.7%
d) 1.7-3%
Answer: b
9. A form
of cast iron in which free carbon is present in the form of nodules in the
matrix of cementite and ferrite. This form of cast iron is ____________
a) Malleable iron
b) Pig iron
c) Wrought iron
d) None of these
Answer: a
10. Which
of the following percent of carbon is correct for Eutectoid steel (at 723oC in Fe3-C diag)?
a) 0.05%
b) 0.5%
c) 0.6%
d) 0.8%
Answer: d
11. Which
of the following is not used as binders for mould materials?
a) Bentonite
b) Kaolinite
c) Backelite
d) Illite
Answer: c
12. Which
of the following is not used as an additive?
a) Dextrin
b) Coal dust
c) Pitch
d) Zinc
Answer: d
14.
Nitriding process is used to increase surface hardness for which of the
following materials?
a) Alloy steels
b) Low carbon steels
c) Medium carbon steels
d) High carbon steels
Answer: a
1. Which
of the following is not a source of moulding sand?
a) Sea
b) Lakes
c) Desert
d) Forests
Answer: d
2. Which
of the following is not a type of moulding sand?
a) Red sand
b) Natural sand
c) Synthetic sand
d) Loam sand
Answer: a
3. What is the percentage composition of clay in natural sand?
a) 22-31%
b) 3-10%
c) 5-20%
d) 18-29%
Answer: c
4. What
is the percentage composition of water in natural sands?
a) 2-4%
b) 5-8%
c) 6-9%
d) 10-13%
Answer: b
5. What
is mixed with natural sand to make it semisynthetic sand?
a) Bentonite
b) Barelelne
c) Cubane
d) Prismane
Answer: a
6. Which
sand is used for casting cast irons and non-ferrous metals?
a) Loam Sand
b) Natural Sand
c) Synthetic Sand
d) Refractory sand grain
Answer: b
7.
Natural sands are economical than synthetic sands.
a) True
b) False
Answer: a
8. What
is the amount of clay content in Loam sand?
a) 30%
b) 40%
c) 50%
d) 60%
Answer: c
9. Which
sand is used for making ferrous and non-ferrous alloys?
a) Natural sand
b) Synthetic sand
c) Loam sand
d) Refractory sand grain
Answer: b
10. A
general loam sand mixture contains how many volumes of silica?
a) 10
b) 20
c) 30
d) 40
Answer: b
1. On
increasing the binder content, what in the moulding sand gets reduced?
a) Hardenability
b) Strength
c) Permeability
d) Brittleness
Answer: c
2. Which
of the following is bentonite?
a) Kaolinite
b) Sodium Montmorillonite
c) Illite
d) Limonite
Answer: b
3. Which
of the following is not a clay binder?
a) Limonite
b) Illite
c) Limonite
d) Carsil
Answer: d
4. Clays
are what type of binders?
a) Organic
b) Patented
c) Inorganic
d) Other binders
Answer: c
5. At
what temperature does the clay dead burning take place?
a) 400°C – 500°C
b) 500°C – 600°C
c) 600°C – 700°C
d) 700°C – 800°C
Answer: b
6. What
is the breadth size range of a clay particle?
a) 0.01-1 micrometres
b) 0.02-2 micrometres
c) 0.03-3 micrometres
d) 0.04-4 micrometres
Answer: a
7. Which
of the following clay binders are most commonly used?
a) Bentonite
b) Illite
c) Limonite
d) Kaolinite
Answer: a
8. What
is the percentage composition of quartz in Western bentonite?
a) 5%
b) 10%
c) 15%
d) 20%
Answer: b
9. What
is the percentage composition of quartz in Southern bentonite?
a) 5%
b) 10%
c) 15%
d) 20%
Answer: c
10. What
is the softening point of western montmorillonite?
a) 800°F – 1150°F
b) 1200°F – 1650°F
c) 1750°F – 2100°F
d) 2100°F – 2450°F
Answer: d
11. What
is the softening point of western montmorillonite?
a) Above 1800°F
b) Above 2000°F
c) Above 2200°F
d) Above 2400°F
Answer: a
12.
Illite has a softening point of about 4500°F.
a) True
b) False
Answer: b
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