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EKT 1 2015 Mechanical Question Paper



Question #1
If the centre of a circle is (-6,8) and it passes through the origin, then equation to its tangent at the origin is
Options
1) 2y=x
2) 4y=3x
3) 3y=4x
4) 3x+4y=0
Question Skipped
Question #2
The liquid is flowing separately through each of two pipes whose diameters are in the ratio of 2:1, if the ratio of the velocities of flow in the two pipes by 1:2, then the ratio of the amounts of the liquid flowing per sec through the pipe will be
Options
1) 2:1
2) 1:1
3) 4:1
4) 1:8

Question #3
If f(x) = x + | x2 - 8 | then the derivative of f( x ) at x = 3 is
Options
1) 6
2) 7
3) 8
4) -8

Question #4
Given P(A) = 1/4, P(B)=1/3 and P(AUB)= 1/2. Value of P(A/B) is
Options
1) 1/4
2) 1/3
3) 1/6
4) 1/7

Question #5
The angle between two vectors a = i+2j-k and b=2i+j+k is
Options
1) 30 deg
2) 45 deg
3) 60 deg
4) 90 deg
Question Skipped
Question #6
Newton is unit of force. It is the unit in
Options
1) MKS system
2) CGS system
3) FPS system
4) None of these

Question #7
A Farad is defined as
Options
1) stat coulomb /volt
2) coulomb/volt
3) coulomb x volt
4) stat coulomb x volt
Question Skipped
Question #8
Permeance of a magnetic circuit corresponds to the following quantity in electrical circuit
Options
1) conductivity
2) resistivity
3) conductance
4) resistance
Question Skipped
Question #9
Hydrometer is an instrument for measuring
Options
1) relative humidity
2) pressure of water
3) volume of liquids
4) specific gravity

Question #10
Radioactivity is a property of
Options
1) atomic nuclei
2) excited electron
3) gamma rays
4) ultraviolet light

Question #11
A bar of length ‘L ‘ meters extends by ‘ l ‘mm under a tensile force of ‘P’. The strain produced in the bar is
Options
1) l/L
2) 0.1 l/L
3) 0.01 l/L
4) 0.001 l/L

Question #12
A rod is enclosed centrally in a tube and the assembly is tightened by rigid washers. If the assembly is subjected to a compressive load, then
Options
1) rod is under compression
2) tube is under compression
3) both rod and tube are under compression
4) tube is under tension and rod is under compression

Question #13
The shear force and bending moment are zero at the free end of a cantilever beam, if it carries a
Options
1) point load at the free end
2) point load at the middle of its length
3) uniformly distributed load over the whole length
4) none of the above

Question #14
The moment of resistance of a balanced reinforced concrete beam is based on the stresses in
Options
1) steel only
2) concrete only
3) steel and concrete both
4) none of these

Question #15
In a flange coupling, the flanges are coupled together by means of
Options
1) bolts and nuts
2) studs
3) headless taper bolts
4) none of these

Question #16
A transmission shaft includes
Options
1) counter shaft
2) line shaft
3) over head shaft
4) all of these

Question #17
A locking device in which the bottom cylindrical portion is recessed to receive the tip of the locking set screw, is called
Options
1) castle nut
2) jam nut
3) ring nut
4) sawn nut
Question Skipped
Question #18
In a venturiflume, the flow takes place at
Options
1) atmospheric pressure
2) gauge pressure
3) absolute pressure
4) none of these
Question Skipped
Question #19
The total pressure on the top of a closed cylindrical vessel completely filled up with a liquid is
Options
1) directly proportional to (radius)2
2) inversely proportional to (radius)2
3) directly proportional to (radius)4
4) inversely proportional to (radius)4

Question #20
When the Mach number is more than 6, the flow is called
Options
1) subsonic flow
2) sonic flow
3) super-sonic flow
4) hyper-sonic flow

Question #21
The discharge through a convergent mouthpiece is __________ the discharge through an internal mouthpiece of the same diameter and head of water.
Options
1) equal to
2) one-half
3) three fourth
4) double
Question Skipped
Question #22
Which of the following statement is wrong?
Options
1) The spheroidising process is usually applied to high carbon tool steels which are difficult to machine
2) In spheroidising process, the cementite in the granular form is produced in the structure of steel
3) The annealing process causes complete recrystallisation in steels which have been severely cold worked and a new grain structure
4) none of the above
Question Skipped
Question #23
Duplex process of steel making is a combination of
Options
1) basic bessemer and acid open hearth processes
2) acid bessemer and basic open hearth processes
3) acid bessemer and acid open hearth processes
4) basic bessemer and basic open hearth processes
Question Skipped
Question #24
The property of a material necessary for forgings, in stamping images on coins and in ornamental work, is
Options
1) elasticity
2) plasticity
3) ductility
4) malleability

Question #25
A ladder is resting on a smooth ground and leaning against a rough vertical wall. The force of friction will act
Options
1) towards the wall at its upper end
2) away from the wall at its upper end
3) downward at its upper end
4) upward at its upper end

Question #26
The slope on the road surface generally provided on the curves is known as
Options
1) angle of friction
2) angle of repose
3) angle of banking
4) none of these

Question #27
For any system of coplanar forces, the condition of equilibrium is that the
Options
1) algebraic sum of the horizontal components of all the forces should be zero
2) algebraic sum of the vertical components of all the forces should be zero
3) algebraic sum of moments of all the forces about any point should be zero
4) all of the above
Question Skipped
Question #28
An open cycle gas turbine works on
Options
1) Carnot cycle
2) Otto cycle
3) Joule's cycle
4) Stirling cycle
Question Skipped
Question #29
When the gas is cooled at constant pressure,
Options
1) its temperature increases but volume decreases
2) its volume increases but temperature decreases
3) both temperature and volume increases
4) both temperature and volume decreases

Question #30
As per Charles' law, the volume of a given mass of a perfect gas varies __________ as its absolute temperature, when the absolute pressure remains constant.
Options
1) directly
2) indirectly
3) no relation
4) none of the above

Question #31
In an extensive property of a thermodynamic system
Options
1) extensive heat is transferred
2) extensive work is done
3) extensive energy is utilised
4) none of these
Question Skipped
Question #32
Rotary compressors are used for delivering
Options
1) small quantities of air at high pressures
2) large quantities of air at high pressures
3) small quantities of air at low pressures
4) large quantities of air at low pressures

Question #33
A rotary compressor is driven by an
Options
1) electric motor
2) engine
3) either (a) or (b)
4) none of these

Question #34
In a centrifugal compressor, an increase in speed at a given pressure ratio causes
Options
1) increase in flow
2) decrease in flow
3) increase in efficiency
4) increase in flow and decrease in efficiency

Question #35
A large clearance Volume in a reciprocating compressor results in
Options
1) reduced volume flow rate
2) increased volume flow rate
3) lower suction pressure
4) lower delivery pressure

Question #36
The effect of having excess camber is
Options
1) excessive steering alignment torque
2) hard steering
3) too much traction
4) uneven tyre wear
Question Skipped
Question #37
If the air-fuel mixture ignites before the spark takes place at spark plug, the condition is called
Options
1) detonation
2) ignition
3) pre-ignition
4) rumble

Question #38
The diagram which shows the correct crank positions corresponding to the opening and closing of the valves, is known as
Options
1) indicator diagram
2) axial force diagram
3) valve timing diagram
4) none of these

Question #39
In value engineering, the term value refers to
Options
1) manufacturing cost of the product
2) selling price of the product
3) total cost of the product
4) utility of the product

Question #40
Production cost refers to prime cost plus
Options
1) factory overheads
2) factory and administration overheads
3) factory, administration and sales overheads
4) factory, administration, sales overheads and profit

Question #41
A systematic job improvement sequence will consist of
Options
1) motion study
2) time study
3) job enrichment
4) all of these

Question #42
Cast iron during machining produces
Options
1) continuous chips
2) discontinuous chips
3) continuous chips with built-up-edge
4) none of these

Question #43
A single point thread cutting tool should ideally have
Options
1) zero rake angle
2) positive rake angle
3) negative rake angle
4) point angle

Question #44
The cutting tool in a milling machine is mounted on
Options
1) spindle
2) arbor
3) column
4) knee

Question #45
One quick way to view the entire drawing area is to use the Zoom command by typing ________.
Options
1) type Z enter A enter
2) type Z enter E enter
3) type SHOWALL enter
4) type ALL enter

Question #46
When setting up a mechanical drawing in AutoCAD the drafter should set the units to ________.
Options
1) fractional
2) decimal
3) architectural
4) metric

Question #47
In a class B push-pull amplifier, the transistors are biased slightly above cut-off to avoid
Options
1) crossover distortion
2) unusually high efficiency
3) negative feedback
4) a low input impedance
Question Skipped
Question #48
The depletion-mode MOSFET
Options
1) can operate with only positive gate voltages
2) can operate with only negative gate voltages
3) cannot operate in the ohmic region
4) can operate with positive as well as negative gate voltages
Question Skipped
Question #49
Ailerons are used to control
Options
1) Yaw of aircraft
2) pitch
3) roll
4) None of these

Question #50
Stalling of the aerofoil occurs
Options
1) When the angle of attack is beyond critical angle of attack
2) When the angle of attack is less than critical angle of attack.
3) Both A and B
4) None of the above


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