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Quiz 4
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Q.1
Projection welding is a
Continuous spot welding process
Multi-spot welding process
Arc welding process
Process used for joining round bars
Q.2
In shielded arc welding
Large electrode is used
Welding rod coated with slag is used
Welding rod coated with fluxing material is used
None of the above
Q.3
The cold chisels are made from
Cast iron
Mild steel
High speed steel
Cast tool steel
Q.4
A three high rolling mill consists of three rolls placed one above the other. Which of the following statement is correct?
The upper and middle rolls rotate in the same direction whereas the bottom roll rotates in opposite direction
The upper and bottom rolls rotate in the same direction whereas the middle roll rotates in opposite direction
The bottom and middle roll rotate in the same direction
Any one of the above
Q.5
The maximum flame temperature occurs
At the outer cone
At the inner cone
Between the outer and inner cone
At the torch tip
Q.6
The temperature produced by oxy-hydrogen flame is about
1800°C
2100°C
2400°C
3200°C
Q.7
When the molten metal is fed in the cavity of a metallic mould by gravity, the method of casting is known as
Die casting method
Slush casting method
Permanent mould casting method
Centrifugal casting method
Q.8
Swab is used for
Smoothing and cleaning out depressions in the mould
Cleaning the moulding sand
Moistening the sand around the edge before removing pattern
Reinforcement of sand in the top part of the moulding box
Q.9
The shrinkage allowance for cast iron pattern is
10 mm/m
16 mm/m
20 mm/m
26 mm/m
Q.10
The advantage of Thermit welding is that
All parts of the weld section are molten at the same time
Weld cools almost uniformly
Results in a minimum problem with internal residual stresses
All of the above
Q.11
When the dimension is expressed as 20 -0.025 ⁺⁰∙⁰³⁵, then the basic size is
20 mm
20.035 mm
20.025 mm
19.975 mm
Q.12
Cast iron and steel pipes are produced by
Slush casting
Investment casting
True centrifugal casting
Die casting
Q.13
Which of the following methods can be used for manufacturing 2 meter long seamless metallic tubes?
Drawing
Extrusion
Rolling
Extrusion and rolling
Q.14
In arc welding, the temperature of heat produced by the electric arc is of the order of
3000°C to 4000°C
4000°C to 5000°C
5000°C to 6000°C
6000°C to 7000°C
Q.15
The adhesiveness is the property of sand due to which
It evolves a great amount of steam and other gases
The sand grains stick together
It clings to the sides of a moulding box
None of these
Q.16
Seam welding is a
Continuous spot welding process
Multi-spot welding process
Arc welding process
Process used for joining round bars
Q.17
Aluminium is the best material for making patterns because it is
Light in weight
Easy to work
Corrosion resistant
All of these
Q.18
In submerged arc welding, an arc is produced between a
Carbon electrode and the work
Metal electrode and the work
Bare metal electrode and the work
Two tungsten electrodes and the work
Q.19
Rotary swaging
Is extensively used for making bolts and rivets
Is used for reducing the diameters of round bars and a tube by rotating dies which open and close rapidly on the work
Is used to improve fatigue resistance of the metal by setting up compressive stresses in its surface
Consists of pressing the metal inside a chamber to force it out by high pressure through an orifice which is shaped to provide the desired form of the finished part
Q.20
When a pattern is made in three parts, the top part, is known as a
Drag
Cheek
Cope
None of these
Q.21
An oxidising process used for aluminium and magnesium articles is called
Galvanizing
Anodizing
Parkerising
Sherardizing
Q.22
The type of file used for a wood work is
Single cut file
Double cut file
Rasp cut file
Any one of these
Q.23
The increase in hardness due to cold working, is called
Age hardening
Work hardening
Induction hardening
Flame hardening
Q.24
A mortise gauge is a
Striking tool
Planing tool
Boring tool
Marking tool
Q.25
If an aluminium pattern made from a wooden master pattern is to be used for grey iron castings, then the shrinkage allowance allowed on the wooden pattern should be
10 mm/m
16 mm/m
20 mm/m
26 mm/m
Q.26
In electric resistance welding, pressure applied varies from
1 to 5 MPa
5 to 10 MPa
10 to 25 MPa
25 to 55 MPa
Q.27
A zinc diffusion process is called
Galvanizing
Anodizing
Parkerising
Sherardizing
Q.28
The property of sand due to which it evolves a great amount of steam and other gases is called
Collapsibility
Permeability
Cohesiveness
Adhesiveness
Q.29
The sand used for making cores is
Green sand
Dry sand
Loam sand
Oil sand
Q.30
Piercing is an operation of cutting
A cylindrical hole in a sheet of metal by the punch and the die
A hole (other than cylindrical) in a sheet of metal by the punch and the die
A flat sheet to the desired shape
A number of holes evenly spaced in a regular pattern on a sheet of metal
Q.31
For gas welding, the pressure desired at the welding torch for oxygen is
7 to 103 kN/m²
70 to 280 kN/m²
280 to 560 kN/m²
560 to 840 kN/m²
Q.32
In a four high rolling mill, there are four rolls out of which
One is working roll and three are backing up rolls
Two are working rolls and two are backing up rolls
Three are working rolls and one is backing up roll
All of the four are working rolls
Q.33
A two high rolling mill consists of two rolls which rotate
At the same speed and in the same direction
At the same speed but in opposite direction
At different speeds and in the same direction
At different speeds and in the opposite direction
Q.34
In ________ welding, the weld may be made either from left to right or from right to left.
Forehand
Backhand
Vertical
None of these
Q.35
The surface to be left unmachined is marked on the pattern by
Red colour
Yellow colour
Black colour
Blue colour
Q.36
The surface to be machined is marked on the pattern by
Red colour
Yellow colour
Black colour
Blue colour
Q.37
A taper provided on the pattern for its easy and clean withdrawal from the mould is known as
Machining allowance
Draft allowance
Shrinkage allowance
Distortion allowance
Q.38
Blanking and piercing operations can be performed simultaneously in a
Simple die
Progressive die
Compound die
Combination die
Q.39
A file with 20 teeth in 25 mm is called
Rough file
Bastard file
Second cut file
Smooth file
Q.40
For welding plates of thickness less than 5 mm, its edges
Do not require bevelling
Should be bevelled to a single-V or U-groove
Should have a double-V or U-groove on one side
Should have a double-V or U-groove on both sides
Q.41
The accuracy of micrometers, calipers, dial indicators can be checked by a
Feeler gauge
Slip gauge
Ring gauge
Plug gauge
Q.42
The metal extrusion process is generally used for producing
Uniform solid sections
Uniform hollow sections
Uniform solid and hollow sections
Varying solid and hollow sections
Q.43
The flux commonly used in brazing is
Zinc chloride
Ammonium chloride
Resin plus alcohol
Borax
Q.44
The centrifugal casting method, is used for casting articles of
Symmetrical shape about vertical axis
Symmetrical shape about horizontal axis
Irregular shape
Nonferrous metal only
Q.45
A casting defect which results in general enlargement of a casting is known as
Shift
Sand wash
Swell
Scab
Q.46
A casting defect which occurs near the ingates as rough lumps on the surface of a casting is known as
Shift
Sand wash
Swell
Scab
Q.47
The operation of cutting a sheet of metal in a straight line along the length, is known as
Plunging
Notching
Slitting
Forming
Q.48
The metal is subjected to mechanical working for
Refining grain size
Reducing original block into desired shape
Controlling the direction of flow lines
All of these
Q.49
In die casting, machining allowance is
Small
Large
Very large
Not provided
Q.50
In a four high rolling mill, the diameter of backing up rolls is ________ the diameter of working rolls.
Equal to
Smaller than
Larger than
None of these
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