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WorksheetsTS ECET 2023
Total questions: 100
Worksheet time: 50mins
..................is used to scribing two parallel lines at a time on a wooden work surface
Feeler gauge
Mortise gauge
Bevel gauge
Marking gauge
What is the name of the chisel used to chip-off excess metal of welded joints and castings?
Cross cut chisel
Half round nose chisel
Flat chisel
Diamond point chisel
Which of the following process belong to forging operation
Welding
Drawing
Piercing
Fullering
The following one is applied to improve the surface finish of the casting
Saw dust
Coal dust
Facing sand
Iron oxide
The purpose of metallic chills used in casting is to
Increase in strength of the casting
Directional solidification
Progressive solidification
Avoid all the defects
Investment casting is also called as
Centrifugal casting
Lost wax method
Cold chamber die casting
Shell moulding
............pattern is used when the contour of the part is such that, withdrawing the pattern from the mould is not possible
Match plate
Sweep
Follow board
Loose piece
In a broaching tool, the teeth which are responsible for heaviest cutting is called
Smooth teeth
Finishing teeth
Semi finishing teeth
Rough teeth
Metal removal rate of a shaper with cutting speed of 40m min−1 , feed rate 0.5mm per stroke and depth of cut 5mm is
1000000mm3min−1
1000000m3min−1
1000mm3min−1
10000m3min−1
In a slotting machine the part which houses complete driving mechanism is
Ram
Column
Table
Base
Which driving mechanism of planing machine do not have speed reduction gear box
Crank drive
Direct reversible drive
Belt drive
Hydraulic drive
Which one of the following is not a desirable property of a cutting fluid
High heat absorption capacity
Preventing adhesion of metal on tool point
Good lubrication
Low flash point stability
A welding process in which a heavy electric current is passed through the metals to be joined over a limited area, causing them to be locally heated to plastic state and the weld is completed by application of pressure for a prescribed time is
Flash welding
Resistance welding
Cold welding
Forge welding
The ingredient of electrode used in welding which provides a reducing gas shield and increases arc voltage is
Potassium aluminum silicate
Cellulose
Ruitle
Metal carbonate
In a fluted milling cutter, the inclined angle between the land and the face of the tooth is called
Clearance angle
Radial rake angle
Lip angle
Relief angle
A milling operation that uses a combination of more than two cutters mounted on a common arbor is called
Gang milling
Straddle milling
Slab milling
Angular milling
The term that indicates the spacing between abrasive grains on a grinding wheel is
Structure
Grain
Grit
Grade
The surface finishing operation performed after polishing to provide a high lustre to the polished surface is
Superfinishing
Honing
Buffing
Lapping
The operation through which a metal is cut along a single line, usually a straight line, is
Shearing
Notching
Trimming
Parting
The locators used to locate work from an external profile or outside edge are
Diamond pin locators
Pin locators
Profile locators
Vee locators
The degree of closeness of the measured value of a quantity to its true value is called
Accuracy
Sensitivity
Precision
Limit gauges are used to:
measure flatness of the component
check if the component dimension lies within permissible limits
measure surface roughness of the component
measure exact size of the component
The surface roughness can be measured with
Sigma Comparator
Autocollimator
Sine bar
Talysurf
The tolerances of the dimension 55±0.02 and 40−0.03+0.02 are
0.09 and 0.02
0.01 and 0.06
0.03 and 0.07
0.04 and 0.05
The straight portion of the surface, on either side of screw is called
Pitch
Flank
Root
Crest
_______is an application technology that uses computer software and machinery to facilitate automate manufacturing processes
Computer integrated manufacturing
Computer aided engineering
Computer aided manufacturing
Computer aided design
What happens to labour workforce when FMS concept is used
Increases and then decreases
Decreases
Increases
Gradually increases with time
Several machine tools can be controlled by a central computer in
Central Computer Numerical Control machine tool
Computer Numerical Control machine tool
Direct Numerical Control machine tool
Numerical Control machine tool
N001 G00 X07000 Y03000 M03 N002 Y06000. In this M03 represents
Start spindle rotation
Clockwise circular interpolation
Absolute command
The study of motion without regard to forces is known as
Kinematics
Dynamics
Actuator
Sensor
In polytropic process equation where PVn is constant, if n=0 , the process is termed as
Isobaric
Adiabatic
Isothermal
Isochoric
In an internal combustion engine, during the compression stroke the heat rejected to the cooling water is 50 kJ/kg and the work input is 100 kJ/kg. The change in internal energy is
-150 kJ/kg
150 kJ/kg
50 kJ/kg
-50 kJ/kg
The heat required to raise unit mass of a solid or liquid through one degree temperature rise is called as
Enthalpy
Entropy
Specific heat
Calorific value
“The internal energy of a perfect gas is a function of the absolute temperature only” This statement is given by
Gay-Lussac’s law
Dalton’s law
Avogadro’s law
Joule’s law
The first stage in the formation of a coal is
Bituminous
Anthracite
Peat
Semi-anthracite
Stoichiometric mixture of air and the fuel is one that contains
Just sufficient oxygen for complete combustion
No air
Deficiency of air
Excess of air
The energy liberated by the complete oxidation of a unit mass or volume of a fuel is called as
Calorific value
Enthalpy
Entropy
Specific heat
An Otto cycle consists of the following processes
Two adiabatic and two isothermal
Two adiabatic and two polytropic
Two adiabatic and two isochoric
Two adiabatic and two isobaric
A Carnot engine working between 227°C and 27°C produces 120 kJ of work. The heat added is
300 kJ
24 kJ
240 kJ
136 kJ
In a four stroke cycle engine
One power stroke is obtained in every two revolution of crank shaft
One power stroke is obtained in each revolution of crank shaft
Power stroke is not obtained in the cycle
One power is obtained in every four revolution of crank shaft
The total power developed by combustion of fuel in the combustion chamber is called as
Friction power
Brake power
Indicated power
Shaft power
Brake thermal efficiency of an engine is given as
Brake power / (Mass of fuel × Calorific value)
(Mass of fuel × calorific value) / Brake power
Mass of fuel / (Brake power × calorific value)
(Brake power × Mass of fuel) / Calorific value
A closed cycle constant pressure gas turbine works on
Rankine cycle
Carnot cycle
Joule cycle
Stirling cycle
The main constructional feature of a ram jet engine is
Having reduction gears
Having Propeller
Having oxidizer tank
Absence of compressor and turbine
The saturation temperature of steam at 6 bar is 158.8°C, temperature of steam was found to be 170°C. The steam will be
Dry saturated steam
Superheated steam
Wet steam
Compressed liquid water
In which of the following boiler, hot gases flow inside the tubes surrounded by water.
Lamont boiler
Cochran boiler
Babcock and Wilcox boiler
Benson boiler
The boiler draught in which a fan is installed near the base of the boiler to force the air through the furnace.
Forced draught
Balanced draught
Induced draught
Natural draught
Superheated steam at 2 bar expands in a convergent–divergent nozzle. For maximum discharge, the critical pressure at throat will be
0.578 bar
0.546 bar
1.156 bar
1.092 bar
During which of the following process does heat rejection take place in Carnot vapour cycle
Isentropic expansion
Isentropic compression
Isothermal compression
Isothermal expansion
The state of a substance whose evaporation from its liquid state is complete, is known as
Air
Perfect gas
Steam
Vapour
The reheat cycle in steam power plant is mainly adopted to
Decrease the capacity of condenser
Recover the waste heat of boiler
Improve thermal efficiency
Decrease the moisture content in low pressure stages to a safe value
Boiler rating is usually defined in terms of
Heat transfer rate in kJ/hr
Steam output in kg/hr
Maximum temperature of steam in Kelvin
Heat transfer area in square meter
A surface condenser used in a steam power station, under cooling of condensate is undesirable due to
Reduce efficiency of the plant
Increase thermal stresses in the condenser
Non absorption of gases in steam
Increase the cooling water requirements
Which one of the following is used to bring down the speed of an impulse steam turbine to practical limits
Large flywheel
Gear box
Centrifugal governor
Compounding of the turbine
Lami’s theorem states that if a point is in equilibrium under the action of three concurrent forces, then each force is proportional to the α of the angle between the other two forces, where α stands for
Tan
Cosec
Sin
Sec
Turning of steering wheel of the car is an example of
Couple
Torque
Force
Impulse
The moment of inertia (I) of a triangular section of height h and base b about an axis passing through the centroid and parallel to the base is given by
bh3/12
bh3/2
bh3/16
bh3/36
The centre of gravity of semi-circle of radius R is
2R/π from the base
R/3π from the base
4R/3π from the base
4R/π from the base
_____ materials are capable of absorbing little elastic deformation and negligible plastic deformation before fracture
Plastic
Ductile
Elastic
Brittle
Poisson’s ratio for Rubber varies from
0.45 to 0.50
0.2 to 0.50
0.25 to 0.33
0.1 to 0.40
The point of contra flexure in a loaded beam is one where
The bending moment changes sign
The bending moment is maximum
The shear force is maximum
The shear forces change sign
A uniformly distributed load w (kN/m) is acting over the entire length of 8 m long cantilever beam. If the bending moment at the fixed end is 64 kN-m, what is the value of w?
8
3
2
6
A beam of 200 mm wide and 200 mm deep is simply supported over a span of 5 meters. If the beam is subjected to a uniformly distributed load of 4 kN/m, find the section modulus of the beam
6.75×106 mm^3
1.33×106 mm^3
5.33×106 mm^3
4.16×106 mm^3
A beam 3 m long simply supported at its ends is carrying a point load of 16 kN at its centre. The moment of inertia of the beam is given as equal to 6×107 mm^4. If E for the material of the beam is 3×105 N/mm^2, what is the deflection at the centre of the beam?
5 mm
0.5 mm
8 mm
0.8 mm
A solid shaft under torsion, shear stress at the outer surface is
Average
Maximum
Zero
Minimum
Which of the following assumption is not true for theory of torsion
The twist along the shaft is uniform
The material of the shaft is uniform throughout
The shaft is uniform circular cross section throughout
Cross section of the shaft, is not plane before and after twist
The distance measured parallel to the axis between corresponding points on adjacent thread forms in the same axial plane section and on the same side of the axis is called as
Lead
Depth of thread
Pitch
Lead angle
The types of gears used to connect two intersecting coplanar shafts is
Bevel gear
Spur gear
Spiral gear
Helical gear
V-belts are suitable for transmission of power between two shafts having
Long centre distance
Angular alignment
Shorter distance
Not used in power transmission
The key that transmits power through frictional resistance only is
Woodruff key
Sunk key
Saddle key
Tangent key
Stud is a machine element that has
Threads on both the ends
Threads on only one end
No threads
Threads on one end with head on the other end
Fluids for which the rate of deformation is proportional to the shear stress are called
Newtonian fluids
Bingham plastic
Dilantant
Pseudo plastic
The continuity equation is the result of application of the following law for the flow field
Conservation of energy
First law of thermodynamics
Conservation of mass
Newton second law of motion
The difference between the energy line and hydraulic gradient line is called
Static head
Pressure head
Potential head
Velocity head
Correct Marks: 1 Wrong Marks: 0 Euler’s equation of motion
Is applicable to any fluid
Considers only the pressure forces acting on a real fluid
Considers gravity and viscous forces acting on a real fluid
Considers only gravity and pressure forces acting on an in-viscous fluid
Correct Marks: 1 Wrong Marks: 0 Loss of head at the exit of pipe is
V2/g
V2/2g
0.5V2/2g
2V2/g
Correct Marks: 1 Wrong Marks: 0 Under most practical conditions, the flow in a circular pipe is laminar if
Re≥4000
Reynolds number is not applicable
Re≤2300
Re=10000
Correct Marks: 1 Wrong Marks: 0 When a steady jet of water impinges on a stationary inclined plane surface and if the fluid friction is neglected, the resultant force on the plane
Is in the direction of the jet flow
Flow direction cannot be determined
Is tangential to the surface
Is normal to the surface
Correct Marks: 1 Wrong Marks: 0 To avoid cavitation, we must ensure that the local pressure everywhere inside the pump should be
Below the vapour pressure
Above the vapour pressure
Gauge pressure
Equal to atmospheric pressure
Correct Marks: 1 Wrong Marks: 0 High specific speed (300rpm to 800rpm) and low heads (below 30 m) indicate that the turbine is
Francis
Pelton wheel
Propeller
Kaplan
Correct Marks: 1 Wrong Marks: 0 A pump is defined as a device which converts
Hydraulic energy into Mechanical energy
Kinetic energy into Mechanical energy
Mechanical energy into Hydraulic energy
Mechanical energy into Kinetic energy
Correct Marks: 1 Wrong Marks: 0 Centrifugal pumps with forward-inclined blades generally have
A lower maximum efficiency than straight-bladed pumps
A higher maximum efficiency than straight-bladed pumps
The same efficiency as straight-bladed pumps
Efficiency independent of blade inclination
Which of the following is not a turbomachine
Kaplan turbine
Reciprocating pump
Fans
Centrifugal pump
The ability of a material to resist indentation or penetration is called as
Resistance
Strength
Hardness
Toughness
The slow and progressive deformation of a material with time at constant stress is called as
Brittleness
Creep
Fracture
Fatigue
In grey cast iron the carbon is in the form of
Cementite
Spheroids
Iron carbide
Graphite flakes
18:4:1 High speed steel contains the following metals respectively
Tungsten, Vanadium, Chromium
Tungsten, Chromium, Vanadium
Chromium, Tungsten, Vanadium
Vanadium, Chromium, Tungsten
Babbit metal is an alloy of the following
Copper, Antimony, Bismuth
Copper, Tin, Chromium
Copper, Tin, Bismuth
Copper, Antimony, Tin
Solid solution of carbon in α- iron is called
Austenite
Pearlite
Ferrite
Martensite
The product from blast furnace is
Pig iron
Wrought iron
Mild steel
Cast iron
The chemical formula for Cementite is
Fe2C3
FeC3
Fe3C
FeC
Cupola is used to make
Wrought iron
Pig iron
Cast iron
Steel
During normalizing operation, the steel castings are cooled in
A water bath
Vegetable oil
An oil bath
Air
Line organization is used in
Banking sector
Civil engineering constructions
Marketing sector
Hospital management
Which of the following layouts is suited to job production
Product layout
Process layout
Functional layout
Plant layout
Which of the following represents India in ISO
FSSAI
BCCI
BIS
PFRDA
The appellate authority for an industrial dispute is
High/Supreme court
Management
Labour court
President
In inventory control, the economic order quantity is the
Lot corresponding to break-even point
Highest level of inventory
Capability of a plant to produce
Optimum lot size
The grouping of activities into organizational units is called
Centralization
Corporate plans
Company policy
Departmentation
ISO 9000 stands for
Qualification management standards
Quality marketing system
Quantity management standards
Quality management standards
