| Post Name | Workshop Instructor/Instructor grade II/Demonstrator - Tool and Die Engineering - Technical Education |
|---|---|
| Question Paper Code | 138/2024/OL |
| Category Code | 242/2023 |
| Date of Test | 31 December 2024 |
| Exam Type | Online Examination |
| Total Questions | 100 |
1
Machinability index of a cutting tool is defined as
Answer
B. Cutting speed of metal investigated for 20 minutes tool life Cutting speed for standard steel for 20 minute tool life
2
In 18-4-1 high speed steel (T-series) the number 18 stands for
Answer
C. % of Tungsten
3
If 'V' is the cutting speed and 'n' is the value which depends on tool and workpiece and 'T' is the tool life and 'C' being a constant, then the relation of cutting speed to the tool life is expressed as
Answer
D. V Tⁿ = C
4
Which type of cutting method will have longer tool life?
Answer
B. Oblique cutting
5
Apron mechanism is used in
Answer
D. Lathe machine
6
If 'D' is the larger diameter for taper turning and 'd' is the smaller diameter of taper over a length 'L', then the setover required for taper turning is given by
Answer
Question Cancelled
7
Undercutting in welding is due to
Answer
D. too high current
8
In foundry operations draft allowance is given to pattern
Answer
C. ease of removal from the mould without injuring the edges of the mould
9
Approximate temperature of heating steel for hand forging can be estimated by the heat colour. The white colour indicates the temperature of
Answer
A. 1200°C
10
In the case for forging operations, swaging or drawing down is the process in which
Answer
B. increasing the length of a bar at the expense of its width or thickness or both
11
Which one of the following projection methods may be adopted in Engineering Drawing?
Answer
D. First and third angle projection
12
A point is 30 mm below the horizontal plane and 50 mm behind the vertical plane. The point is situated in which quadrant?
Answer
C. Third quadrant
13
A line 60 mm long is parallel to vertical plane and inclined to horizontal plane at angle of 30°. Which one of the below statement is correct?
Answer
A. Its front view measures the true length and top view measures the reduced length
14
Which one of the following conic section eccentricity less than one?
Answer
Question Cancelled
15
A non-truncated hollow cone having base radius 'R' and height 'h'. Its development of surface will have the shape of
Answer
D. Sector area of a circle
16
In isometric projection the angle between any two isometric axes is
Answer
B. 120°
17
In the nomenclature of screw thread the term 'lead' is
Answer
C. It is the axial distance a screw thread advanced in one revolution
18
If 'd' is the diameter of hexagonal bolt, then the empirical relation for thickness of bolt head in terms of diameter 'd' is
Answer
D. 0.8 d
19
Normally the marginal distance taken for a rivetted joint in terms of rivet diameter 'd' is
Answer
B. 1.5 d
20
Consider a fit designated by 30H8f7, the 'f7' refers to
Answer
A. Tolerance grade for shaft
21
The property of a material to absorb large amount of energy before fracture is known as
Answer
A. Toughness
22
The point of contraflexure occurs only in
Answer
D. Overhanging beam
23
In a simply supported beam the shear force along a section is zero; where bending moment is
Answer
B. Maximum
24
Which of the following is the hardest material?
Answer
A. Boron Carbide
25
The structure of eutectoid steel is
Answer
C. Pearlite Alone
26
The main objective of heat treatment of steel is to improve
Answer
C. Mechanical properties
27
An example of non destructive test is
Answer
D. Radiography test
28
In a thin walled cylinder, Hoop stress is
Answer
A. Circumferential Tensile Stress
29
The ratio of shear stress to shear strain is called
Answer
D. Modulus of Rigidity
30
A column with maximum equivalent length has its
Answer
B. One End Fixed and Other End Free
31
The type of flow in which the density is constant for the fluid flows?
Answer
B. Incompressible flow
32
A pipe has 200 mm and 400 mm diameters at sections 1-1 and 2-2 respectively. If the velocity of water flowing through the pipe at section 1-1 is 4 m/s, determine the velocity of water at section 2-2
Answer
D. 1 m/s
33
The property of a fluid that resists the relative motion between its adjacent layers is known as
Answer
C. Viscosity
34
A surge tank is provided in the hydroelectric power plant to
Answer
D. Reduce water hammer pressure
35
Which of the following is NOT an assumptions of Bernoulli's equation?
Answer
A. The fluid is viscous
36
Which of the following is a characteristic of thermoplastic materials?
Answer
B. They soften when heated and can be remoulded
37
In which process is the plastic material heated and then forced through a die to form continuous shapes?
Answer
C. Extrusion moulding
38
What does the term "clamping force" refer to in injection moulding?
Answer
B. The force used to hold the mould shut during injection
39
Which of the following is a type of ejection system used in injection moulding?
Answer
D. All of the above
40
What is the primary purpose of the "runner system" in injection moulding?
Answer
A. To guide the molten material into the mould cavity
41
Which moulding process involves heating a thermoplastic sheet and forming it over a mould by applying vacuum?
Answer
C. Vacuum forming
42
Which of the following materials is commonly used in die casting due to its low melting point and good fluidity?
Answer
D. Zinc alloys
43
What is the term for the process of producing parts from a preheated mould and pressure during moulding in a closer cavity?
Answer
C. Compression moulding
44
What is the most common application of blow moulding?
Answer
A. Creating hollow plastic parts such as bottles
45
Which cooling system is most commonly used in injection moulding to reduce cycle time?
Answer
C. Water cooling through channels in the mould
46
Which moulding process is most suitable for producing large, thin- walled hollow objects?
Answer
D. Rotational Moulding
47
In multi-colour injection moduling, what ensures that the right colour is injected into each part of the mould?
Answer
B. Sequential injection using multiple injection units
48
What is the primary difference between thermoplastic and thermosetting plastics?
Answer
A. Thermoplastics can be remoulded multiple times, while thermosets cannot be reformed once set
49
Which of the following is NOT a typical characteristic of die-casting alloys?
Answer
B. Low fluidity for complex mould designs
50
In calendaring, the material is passed between which of the following?
Answer
A. Two heated rollers
51
A process that produces relatively shallow indentation or raised design with theoretically no change in metal thickness is called
Answer
C. Embossing
52
Cutting and non cutting operations are performed by
Answer
C. Combination Die
53
Find the cutting force for blanking a rectangular piece of aluminium soft steel, 40 × 20 mm and 1 mm thick. Shear strength = 110 N/mm².
Answer
A. 13.2 kN
54
The Bending Force (F) required to bend a materials of thickness 't' mm, length of bend part 'l' mm, width between contact point of die 'w' mm, Ultimate tensile strength is 'S' N/mm² and die opening factor 'k' is given by
Answer
C. klSt²/w
55
Which of the following are non-cutting operations? (i) Notching (ii) Coining (iii) Curling (iv) Bending
Answer
D. Only (ii), (iii) and (iv)
56
The operation in which the surface of the previously cut edge is finished smoothly to accurate dimensions?
Answer
A. Trimming
57
In a blanking operation, the clearance is provided on :
Answer
A. The Punch
58
In sheet metal blanking, shear is provided on punches and die so that
Answer
B. Press load is reduced
59
Cutting force in blanking and piercing operation mainly depends upon
Answer
C. The shear strength of material
60
The process of shearing strip in three sides of a rectangle and bending the strip about one of the sides not sheared is called
Answer
B. Lancing
61
The press tool component used to locate the strip or the component accurately on the required position, prior to a cutting operation
Answer
C. Pilot
62
Which of the following are part(s) of a press tool die set: (i) Punch and Die (ii) Core and cavity plate (iii) Stripper (iv) Shank
Answer
B. only i, iii, iv
63
The stripping force is _____________ (%) of the cutting force.
Answer
C. 5-20
64
The phenomenon in bending operation in which elastic stresses remaining in the bend area is released causing in slight decrease in the bend angle is called
Answer
D. Springback
65
The clearance equation between punch and die for material thickness t mm, shear strength S N/mm² and clearance C mm/side is
Answer
D. C = 0.0032t√S
66
Maximum utilization of a material in designing a die is done by
Answer
A. Strip layout
67
Factors considered in calculating bend allowance of dies are
Answer
D. Bend angle, inside radius and metal thickness of the bend
68
Decrease in the actual bend angle after bending in dies is called
Answer
B. Spring back
69
Spring back can be compensated by
Answer
B. Overbending
70
Number of draws in drawing operation is decided by the
Answer
A. Ratio of height of cup to diameter of cup
71
Spring back during bending increases with
Answer
D. all of the above
72
Force required for drawing directly depends upon
Answer
A. Yield strength of the material
73
The smallest measurement that can be made by an instrument is called
Answer
C. Least count
74
Ability of a measuring instrument to give the same value everytime the measurement is repeated
Answer
B. repeatability
75
Closeness of a measuring instrument to the true value of the quantity to be measured is indicated by
Answer
A. Accuracy
76
Value of quantity is obtained directly by comparing the unknown with the standard in
Answer
A. Direct measurement
77
Errors that are fluctuating and are not predictable are called
Answer
C. Random errors
78
Which of the following is an angle measuring instrument
Answer
D. Autocollimator
79
Horizontal position of surfaces in inspected using
Answer
B. Spirit level
80
The internal diameter is checked by using
Answer
D. Plug gauge
81
Least count of a vernier calliper is usually
Answer
C. 0.02 mm
82
Joining of slip gauges together to create larger size is termed as
Answer
A. Wringing
83
Errors that are predictable and can be eliminated are called
Answer
B. Systematic errors
84
Ability of an instrument to detect small differences in measurement
Answer
B. Sensitivity
85
The lowest to highest values that can be measured using a particular instrument is called
Answer
D. Range
86
'Fool proofing' in fixtures refers to i. arresting all degrees of motion of workpiece with the help of fixture ii. arresting all rotations of workpiece along the three axis. iii. locating system that does not permit to load the workpiece incorrectly on a fixture
Answer
C. Only iii
87
For locating a workpiece with two drilled holes using a base plate but having dimensional variation between centre to centre distance of holes
Answer
B. a round pin and a diamond pin can be used
88
Which of the following statements are incorrect about a clamp? A clamp should i. be a six point locator ii. hold the workpiece firmly but should not damaged it iii. be quick acting iv. be of weak material so that it should fail first in case of shocks, vibration and chatter and protect the workpiece
Answer
A. i and iv
89
Which of the following is not a type of clamp?
Answer
A. Sledge clamp
90
A _________ clamp is used in spring type milling fixture for holding workpiece in position.
Answer
D. Screw clamp
91
Which of the following is a desirable property of tool material used in EDM?
Answer
B. High thermal conductivity
92
Which of the following is not a property of dielectric used in EDM?
Answer
A. It should have high electrical conductivity
93
The most commonly used electrolyte in ECM is
Answer
C. Solution of sodium chloride
94
Define the term 'wear ratio' associated with ultrasonic machining process
Answer
B. Volume of material removed from work / Volume of material eroded from tool
95
laser system used in LBM does not use one of the gases given in the options below. Identify it.
Answer
D. Hydrogen
96
Type of motor used in NC open-loop positioning system
Answer
B. Stepper motor
97
In manual part programming S-word represents
Answer
C. Spindle speed
98
In CNC, ATP represents
Answer
Question Cancelled
99
Which of the following statements is incorrect about FMS?
Answer
D. In an FMS, the mix of part styles and quantities of production cannot be adjusted in response to changing demand patterns
100
Mastercam is a
Answer
B. Software package for CNC part programming
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