Reference no: EM13900006
Part -1:
1- Grinding process is performed on:
- Flat and round Parts
- Flat only
- round only
- None of the above
2- In casting, the mold has to be
- Cooled up to - 370 ° C
- Heated up to 370 °
- Both above
- None of the above
3- Turning can produce:
- Hexagon
- Gears
- Pentagon
- None of the above
4- Investment casting is for:
- Up to 1.5 kg weight products
- Up to 15 kg weight products
- Up to 150 kg weight products
- None of the above
5- Tundish in continuous casting is for:
- Melting the metal
- Cooling the metals
- Filtering the metal
- All above
6 - In punching, the punch force is the product of:
- Tensile force and cross sectional area being sheared
- Shear force and length of workpiece
- Compressive force and cross sectional area being sheared.
- None of the above
7-- Milling machines can produce:
- Gears
- Shafts
- Rods
- All above
8- Defects in deep drawing include:
- Earrings
- Energy waste
- None skilled operator
- None of the above
9- In spinning operations
- More material Is wasted
- Operation takes long time
- All above
- None of the above
10- Bent parts can be
- Up to 1 m in length
- Up to 3 m to length
- Up to 6 m to length
- None of the above
11- Ingot casting is:
- Mould casting
- Continuous casting
- All above
- None of the above
12- In sand casting, Major part of mold is:
- 0.007 - 0.0085 Sand
- 0.07 - 0.085 Sand
- 0.7 - 0.85 Sand
- None of the above
13- Fatigue is
- Monotonic stress
- Cyclic stress
- Single application of stress
- None of the above
14- In the grinding wheel (38 A 8 K 60 V G) Number 8 refers to:
- Grade
- Structure
- Bond
- None of the above
15- Broaching process is for
- External cut only
- No Internal cut only
- All above
- None of the above
16- In casting the pattern usually made:
- Same size of the product
- Larger than the product
- Smaller than the product
- None of the above
Part -2:
1. Polymer reaction groups includes
Hexane groups
Byutane groups
All above
None of the above
2. Barreling phenomena in forging is due to:
High pressure at the interface
Non- uniform crystal structure
Friction forces at the interface
None of the above
3- In hot working operations, barreling can be reduced by:
Using heated dies
Thermal barrier at the interface.
All above
None of the above
4. Types of adhesive bonding
Natural adhesive
Inorganic adhesive
Synthetic organic
All above
5. Rolling is the process of ;
Increasing the thickness of a long work piece
Applying tensile forces through a set of rolls.
All above
None of the above
6- In rolling process
Without friction the rolls cannot pull the strip into the roll gap.
The force and power requirement will rise as friction increase.
All above
None of the above
7- Elastomers are;
Heavy cross linked
Lightly cross linked
Not cross linked
None of the above
8- Investment casting is for
Up to 15 kg weight products
Up to 150 mm thickness products
All above
None of the above
9- In rod & wire drawing, the major variables:
Reduction in cross section
Die angle
Friction force
All above
10. Defects in drawing
Cracking increase with increasing die angle.
Low friction
All above
11- In drawing operations:
C Lubrication is not important
In dry drawing no coating required
All above
None of the above
12. Ultrasonic vibration in drawing:
Increase friction
Increase drawing forces
All above
None of the above
13 - In metals produced by metal working, the rolling process accounts for:
50 percent
70 percent
90 percent
None of the above
14- Rolling is first carried out at:
Room temperature
High temperature
All above
None of the above
15- In hot rolling:
μ = 0.002 - 0.007
μ = 0.02 - 0.07
μ = 0.2 - 0.7
none of the above
16- Extrusion is a process for:
Object with fixed cross section
Material pushed or drawn through die
All above
None of the above
17- Defects in deep drawing include:
Wear
Energy waste
Non skilled operator
None of the above
18- In shell mold casting, the mold has to be prepared initially by:
Cooled up to - 370 ° C
Heated up to 370 ° C
Both above
None of the above
19 Key factors in deep drawing includes:
The blank holder force
Friction and lubrication
The speed of the punch
All above
20- Defects in deep drawing include:
Tearing
Earring
Surface scratches
All above
21- In spinning operations:
More material is wasted
operation takes long time
All above
None of the above
22- In conventional spinning:
Manual or hydraulic tooling.
Needs sequence of passes.
Requires considerable skills.
All above
23- Bent parts can be:
Only small, such as a bracket,
Only long specimens
All above
None of the above
24- Ingot casting is:
Mould casting
Continuous casting
All above
None of the above
25- In casting:
Furnace selection does not depend on the type of metal
Gating system should maximize turbulent flow
All above
None of the above
26- Tundish in continuous casting is for:
Heating the metal
Cooling the metals
Filtering the metal
All above
27- Casting defects include:
Fault in design of gating system and riser
Improper choice of molding sand
Improper metal composition
All above
28- Purpose of flux in welding:
Retard oxidation
Generating a gaseous shield
All above
None of the above
29- Gas metal arc welding is:
For ferrous materials
For nonferrous materials
All above
None of the above
30- Non-consumable electrode is made from:
Al203 electrode
SiC electrode
WC electrode
All Above
Part -3
1- Rolling is the process of:
Increasing the thickness of a long workpiece
Applying compressive forces through a set of rolls.
All above
None of the above
2- In rod & wire drawing, a major variable is
Reduction in cross section
Increase in cross section
Lubricant type
All above
3- Defects in drawing:
Cracking increases with increasing die angle.
Low friction
All above
None of the above
4- In dry drawing operations:
No lubrication
In dry drawing no coating is required
In dry drawing coating is required
None of the above
5- Rolling is first carried out at:
Room temperature
High temperature
All above
None of the above
6- Extrusion is a process for:
Object with fixed cross section
Short product only
Non-finished parts
None of the above
7- Creep is:
Gradual increase of plastic strain
Gradual increase of elastic strain
No strain
None of the above
8- one of the basic types of extrusions
Draw extrusion
Indirect extrusion
Past extrusion
All of the above
9- In bending:
Workpiece springback
No springback
All above
None of the above
10- In casting:
Furnace selection does not depend on the
type of metal
Gating system should maximize turbulent
flow
All above
None of the above
11- Chip hardness is:
230 VPN
316 VPN
690 VPN
None of the above
12- Max. Temperature on workpiece during cutting:
400 °C
600 °C
700 °C
None of the above
13- Cutting tool can be made of:
Low carbon steel
Aluminum
Carbon boron nitride
None of the above
Part -4
1- Discontinuous chips tend to be formed in:
Brittle material
Ductile material
Small chip thickness
None of the above
2- Continuous chips tend to be formed in:
Brittle material
Ductile material
Large chip thickness
None of the above
3- To avoid built up edge, use:
Decrease cutting speed
Increase feed rate
Increase rake angle
None of the above
4- Ceramic as cutting tool is having:
Very low wear resistance
High toughness
No built up edge
None of the above
5- Cutting fluids are used to:
Cool the cutting tool
Increase the friction
Increase force and energy
None of the above
6- Grinding is:
chip forming process
No chips in grinding
Low accuracy
None of the above
Part -5:
- A cylindrical specimen made of annealed steel has a diameter of 125 mm and has 80 mm height. It this cylinder has to he upset at room temperature by open die with flat dies to a height of 60 mm. If the coefficient of friction is 0.15, calculate the upsetting force required at the beginning of the stroke, Use the strain hardening exponent n = 0.15 and the strength coefficient k = 1000 Mpa.
Calculation of average pressure and upsetting force in forging
How to minimize barrelling effect
barrelling caused by friction can be minimized by applying an effective lubricant or ultrasonic vibration
In hot working operations, barreling can be reduced by using heated dies or a thermal barrier at the interface.