MCQ
1181.
Core boxes are made out of which pattern?
Plaster pattern
Metal patterns
Polystyrene pattern
Wax pattern
1182.
Where does the granular molding material get loaded into?
Barrel
Hopper
Pellets
Split
1183.
Nitriding process is used to increase surface hardness for which of the following materials?
Alloy steels
Low carbon steels
Medium carbon steels
High carbon steels
1184.
In solid casting method, the resin mixture is kept for how much time for hardening and curing?
1-2 hours
2-3 hours
3-4 hours
4-5 hours
1185.
Which of the following material is not used for mold making?
Iron
Mild steel
Zinc
Alloy steel
1186.
Which of the following is not a limitation of metal patterns?
Get rusted
Obtain rough surface finish
Expensive
Heavy
1187.
Which of the following is not a source of moulding sand?
Sea
Lakes
Desert
Forests
1188.
Metal patterns have a longer life than wooden pattern.
True
False
1189.
The designing of a pattern does not include which of the following feature?
To locate the direction of the parting line and adjust the component accordingly
To determine regions and measurement of draft angles and radii of the sharp edges where allowances are to be given
To recognize and abolish the region of or where the defects could take place during casting
To 3D print the design for making the pattern.
1190.
How is the die used in injection molding cooled?
Oil
Air
Water
Contact with cold surface
1191.
What is meant by drag in casting process?
Upper part of casting flask
Molten metal
Lower part of casting flask
Upper and lower part of casting flask
1192.
ফিডওয়াটারের মধ্যে দূষিত বস্তু থাকলে বয়লারের নিচের কী অসুবিধা হয়?
স্তর জমা
ক্ষয়
ভঙ্গুরতা
সবক'টি
1193.
Which of the following patterns has high compressive strength?
Plastic pattern
Plaster pattern
Polystyrene pattern
Wax pattern
1194.
In sand castings, modification of bosses is done to-
have good surface finish
reduce the chances of porosity
eliminate the use of core
reduce casting yield
1195.
Which of the following is the heaviest?
White
Cast Iron
Brass
Aluminium
1196.
The axis of the cylindrical boss should be in the parting plane to have satisfactorily use of boss in casting.
True
False
1197.
The shrinkage allowance for metal casting varies by the type of-
pattern
material
mould
metal
1198.
Which of the following pattern making machine makes wooden board?
Jointer
Mortiser
Drill press
Scroll saw
1199.
What is the minimum temperature allowed to be given to the injection molding process?
120°C
130°C
140°C
150°C
1200.
Which of the following material is not made by injection molding?
Nuts
Car handles
Tubes
Electrical fittings