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Quiz 1
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Q.1
The temperature of oxy-hydrogen flame is ________ oxyacetylene flame.
Same as
Less than
More than
None of these
Q.2
The cross-section of a chisel is usually
Rectangular
Square
Hexagonal
Octagonal
Q.3
Cores are used to
Form internal cavities in the casting
Improve mould surface
Form a part of a green sand mould
All of these
Q.4
The welding process used to join the ends of two pipes of uniform cross-section, is
Spot welding
Seam welding
Projection welding
Upset butt welding
Q.5
Which of the following statement is wrong?
The mortise gauge has two scribing pins
The gouges are chisels with a hollow shaped blade
An auger is a planing tool
All of these
Q.6
The cold working of metals is carried out
At the recrystallisation temperature
Below the recrystallisation temperature
Above the recrystallisation temperature
At any temperature
Q.7
The consumable electrode is used in
Carbon arc welding
Submerged arc welding
TIG arc welding
MIG arc welding
Q.8
During drawing operation, the states of stress in cup would include
Compressive stress in the flange
Tensile stress in the wall
Both (A) and (B)
None of these
Q.9
The parts of circular cross-section which are symmetrical about the axis of rotation are made by
Hot forging
Hot spinning
Hot extrusion
Hot drawing
Q.10
The recrystallisation temperature of steel is
400°C
600°C
800°C
None of these
Q.11
The teeth of hacksaw blade are bent
Towards right
Towards left
Alternately towards right and left and every third or fourth left straight
May be bent in any direction
Q.12
The hot working of metals is carried out
At the recrystallisation temperature
Below the recrystallisation temperature
Above the recrystallisation temperature
At any temperature
Q.13
In a gas welding of mild steel using an oxyacetylene flame, the total amount of acetylene consumed is 10 litres. The oxygen consumption from the cylinder is
5 litres
10 litres
15 litres
20 litres
Q.14
Which of the following welding process uses non-consumable electrodes?
TIG welding
MIG welding
Manual arc welding
Submerged arc welding
Q.15
The operation of bending a sheet of metal along a curved axis, is known as
Plunging
Notching
Slitting
Forming
Q.16
The oxyacetylene gas used in gas welding produce a flame temperature of
1800°C
2100°C
2400°C
3200°C
Q.17
In forehand welding, the angle between the welding torch and the work is ________ as compared to backhand welding.
Same
Less
More
None of these
Q.18
The electron beam welding can be carried out in
Open air
A shielded gas environment
Vacuum
A pressurized inert gas chamber
Q.19
In sheet metal work, he cutting force on the tool can be reduced by
Grinding the cutting edges sharp
Increasing the hardness of tool
Providing shear on tool
Increasing the hardness of die
Q.20
The edge of a steel plate cut by oxygen cutting will get hardened when the carbon content is
Less than 0.1 percent
Less than 0.3 percent
More than 0.3 percent
Anywhere between 0.1 to 1 percent
Q.21
Structural sections such as rails, angles, I-beams are made by
Hot rolling
Hot drawing
Hot piercing
Hot extrusion
Q.22
A hacksaw blade cuts on the
Forward stroke
Return stroke
Both forward and return strokes
Cutting depends upon the direction of force
Q.23
In average work, the tolerance produced by investment casting method is
±0.05 mm
+0.2 mm
+05 mm
+1 mm
Q.24
In blanking operation, the clearance is provided on
Punch
Die
Half on the punch and half on the die
Either on punch or die depending upon designer's choice
Q.25
V-block is used to
Check the trueness of flat surfaces
Locate centres of round rods
Check the surface roughness
None of these
Q.26
In piercing operation, the clearance is provided on
Punch
Die
Half on the punch and half on the die
Either on punch or die depending upon designer's choice
Q.27
The operation of cutting a cylindrical hole in a sheet of metal by the punch and die is called
Shearing
Piercing
Punching
Blanking
Q.28
A moving mandrel is used in
Wire drawing
Tube drawing
Metal cutting
Forging
Q.29
The brass and bronze are welded by _________ flame.
Neutral
Oxidizing
Carburising
All of these
Q.30
A gimlet is a ________ tool.
Boring
Marking
Cutting
None of these
Q.31
The electrode tip diameter (d) in spot welding should be equal to (where t = Thickness of plate to be welded)
√t
1.5 t
3 t
6 t
Q.32
Which of the following statement is wrong?
The hot chamber die casting machine is used for casting zinc, tin, lead and other low melting alloys.
The cold chamber die casting machine is used for casting aluminium, magnesium, copper base alloys and other high melting alloys.
The castings produced by centrifugal casting method have open and coarse grained structure.
All of the above
Q.33
In TIG arc welding, the welding zone is shielded by an atmosphere of
Helium gas
Argon gas
Either (A) or (B)
None of these
Q.34
In sheet metal blanking, shear is provided on punches and dies so that
Press load is reduced
Good cut edge is obtained
Warping of sheet is minimized
Cut blanks is straight
Q.35
Which of the following statement is wrong?
The angular clearance on dies varies from 0.5° to 1°
In drawing operation, the metal flows due to plasticity
In press operation, the size of the pierced hole is independent of the size of punch
None of the above
Q.36
For obtaining a cup of diameter 25 mm and height 15 mm by drawing, the size of the round blank should be approximately
42 mm
44 mm
46 mm
48 mm
Q.37
The diaphragm moulding machine is used to
Ram the sand harder at the pattern face with decreasing hardness towards the back of the mould
Ram the sand harder at the back of the mould and softer on the pattern face
Produce uniform packing of sand in the mould
Give uniform sand hardness throughout the mould
Q.38
In a centrifugal casting method
Core is made of sand
Core is made of ferrous metal
Core is made of nonferrous metal
No core is used
Q.39
The temperature of the inner luminous cone of neutral flame is about
1000°C
1250°C
2100°C
3200°C
Q.40
The acetylene cylinder is usually painted with
Black colour
White colour
Maroon colour
Yellow colour
Q.41
The oxygen cylinder is usually painted with
Black colour
White colour
Maroon colour
Yellow colour
Q.42
In order to deliver molten metal from pouring basin to gate, a ________ is used.
Riser
Sprue
Core
None of these
Q.43
In welding magnesium with TIG arc welding, direct current with ________ is used.
Straight polarity
Reversed polarity
Both (A) and (B)
None of these
Q.44
Thermit, used in Thermit welding, is a mixture of
Charcoal and iron oxide
Charcoal and aluminium
Iron oxide and aluminium
Charcoal, iron oxide and aluminium
Q.45
For welding plates of thickness more than 12.5 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.46
A rip saw
Is a two man saw
Is used for cutting along the grains of wood
Has a narrow blade with two wooden handles
All of the above
Q.47
For smoothing and cleaning out depressions in the mould, a ________ is used.
Slick
Lifter
Swab
Gagger
Q.48
In order to produce uniform packing of sand in the moulds, a _________ is used.
Sand slinger
Squeezing machine
Jolt machine
Stripper plate machine
Q.49
A jolt machine is used to
Ram the sand harder at the pattern face with decreasing hardness towards the back of the mould
Ram the sand harder at the back of the mould and softer on the pattern face
Produce uniform sand hardness throughout the mould
Produce uniform packing of sand in the mould
Q.50
In order to ram the sand harder at the back of the mould and softer on the pattern face, a ________ is used.
Sand slinger
Squeezing machine
Jolt machine
Stripper plate machine
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