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Delphi TVS Technical Test Questions 2009

Posted on :25-04-2016

Q1. Bronze is used in journal bearings essential to

a) reduce friction 
b) reduce heat
c) eliminate oxidization 
d) eliminate seizing


Q2. Temperature rise in fluid flow causes

a) reduction in viscosity 
b) increase in viscosity 
c) no effect


Q3. Corioles component is associated with

a) Displacement 
b) acceleration
c) velocity 
d) none


Q4. Hardness in steel is a result of

a) martensitic structure 
b) pearlitic structure
c) leduburetic structure 
d) austenitic structure


Q5. A 523 kg experimental rocked sted can be accelerated from rest to 1602 km/h in 1.82s. What net force is required?

a) 4.6X106N
b) 4.6X105N
c) 1.6X106N
d) 1.3X105N


Q6. How many atoms are present in a mole of CH4?
(Avogadros number = 6.023X1023 /mole)

a) 1.2X1024
b) 3.01X1024
c) 1.2X1023
d) 6.023X1023


Q7. A 16 ohm resistor and 8 ohm resistor are connected in series across a 12V battery. What is the voltage across each resistor respectively?

a) 8V, 4V
b) 4V, 8V
c) 12V, 12V
d) 6V, 6V


Q8. Machine tool drives are generally given in:

a) arithmetic progression 
b) geometric progression
c) harmonic progression 
d) none of the above


Q9. Coolant is generally not used while machining

a) low carbon steel 
b) high carbon steel
c) cast iron 
d) alloy steel


Q10. How many of the following statements regarding light are true?

1. Light travels in a straight line even when it crosses between two media of different refractive index
2. Infrared light has longer wavelength than ultra-violet light
3. Light can behave both like a ray and like a particle
4. It is possible to get a real image with a concave lense

a) Only one
b) Only two
c) Only three
d) All four


Q11. Finite element analysis is used in

a) accurate measurement 
b) stress analysis
c) metallurgy 
d) none of the above


Q12. How many of the following statements regarding sound are true?

1. Intensity depends on the square root of the amplitude
2. Loudness only depends on the intensity of a sound
3. The pitch of a sound depends on the frequency
4. Sound is reflected whenever a change in acoustic impedance is encountered.

a) Only one
b) Only two
c) Only three
d) All four


Q13. A power station generates 500MW of power and exhausts 800MW as waste heat into the environment. What is the efficiency of the power station? 

a) 61.5%
b) 38.5%
c) 62.5%
d) 23%


Q14. Machinability of steel is improved by the presence of

a) nickel 
b) tungsten
c) sulphur 
d) chromium


Q15. How long does it take a 350 W coffee pot to boil of 0.7 L of water initially at 1000 c? The latent heat of vapourisation of water = 2.1 X 106 J/kg.

a) 6.1 min.
b) 7.0 min
c) 3.9 min.
d) 3.1 min.


Q16. Negative rake angle

a) increases cutting force 
b) decreases cutting force
c) no effect on cutting force 
d) none of the above


Q17. The hardest tool material used is

a) coated carbide 
b) high speed steel
c) boron nitride 
d) diamond


Q18. Stick slip phenomenon is associated with

a) spindle rotation 
b) belt drives
c) slide movement 
d) none of the above


Q19. Gear hobbing is

a) shaping process 
b) generating process
c) forming process


Q20. Cutting speed of H.S.S tools while cutting low carbon steel

a) 40m/min 
b) 250m/min
c) 500m/min 
d) none


Q21. Cutting speed of carbide tools while cutting low carbon steel

a) 40m/min 
b) 250m/min
c) 500m/min 
d) 80m/min 


Q22. Straightness that can be achieved over a length of 300mm by grinding

a) .005 -.01mm 
b) 0.1-0.2mm
c) 0.05-0.1mm 
d) 0.5-0.8mm


Q23. The circularity that can be achieved by finish turning on a standard centre lathe is

a) 0.005-0.008mm 
b) 0.0-0.08mm
c) 0.1-0.2mm 
d) 0.2-0.3mm


Q24. Honing can correct

a) ovality 
b) taper
c) straightness of bore 
d) axial curvature


Q25. Machine tool sliding surfaces are finish matched by

a) surface grinding 
b) fine milling
c) slide way grinding 
d) scraping


Q26. Close sliding fit is given by

a) H7/g6 
b) H7/h6
c) H9/p6 
d) H7/k6


Q27. 60H6 can be achieved by

a) turning 
b) boring
c) drilling 
d) internal grinding


Q28. The displacement accuracy which can be achieved on a jig boring machine

a) 5/µm 
b) 50/µm 
c) 100/µm


Q29. Hardness value in cast iron can be measured in

a) shore 
b) BHN 
c) Rockwell 
d) none


Q30. Auto collimator is used to measure

a) diameter upto 0.001mm 
b) lengths
c) straightness 
d) Involute error


Q31. Surface finish is measured by

a) comparator 
b) planograph
c) sprit level 
d) none


Q32. The outside diameter of a 20 teeth 3 module gear is

a) 54 
b) 60 
c) 63 
d) 70


Q33. Herring bone gear is used for

a) High speed transmission 
b) noise free transmission
c) Better load transmission 
d) none


Q34. In a right angle transmission by helical gears, the hand of the helix of the gears are

a) same 
b) opposite 
c) Immaterial 
d) none 


Q35. Worm drive is always self-locking

a) True 
b) false


Q36. Most hydrostatic bearings normally work under

a) constant flow system 
b) constant pressure system
c) constant temperature system 
d) constant volume system


Q37. Ball bearings are not generally used in crank shafts of automobiles because

a) of high cost 
b) of high speed 
c) cannot be assembled 
d) none


Q38. The spindle of high precision cylindrical grinder is mounted on

a) Ball bearing 
b) Taper roller bearing
c) Hydrostatic bronze bearing 
d) needle bearing


Q39. To accelerate the flow of gases

a) nozzle is used 
b) diffuser is used
c) dia of pipe to increased 
d) none of these will help


Q40. Hydraulic accumulator

a) acts as an accumulator 
b) acts as a storage for hydraulic energy
c) acts as a pressure relief 
d) none


Q41. When ice which is floating in water, melts, does the level to water

a) go up 
b) go down 
c) remain the same.


Q42. Hammer blow in pipe happens due to

a) friction in pipes 
b) change in temperature
c) stoppage of flow 
d) none


Q43. Ratio between velocity of sound and velocity of any object is

a) prandtl number 
b) Reynolds number
c) avagadros number 
d) mach number


Q44. Cavitation effect in flow occurs due to

a) excess pressure 
b) excess temperature
c) excess flow 
d) none


Q45. In electrical locomotives ultimate transmission is by

a) AC Motor 
b) DC Shunt Motor
c) DC Series Motor 
d) Synchronous motor 


Q46. Four beams of identical sections and lengths are made of cast iron, aluminium, steel and hardened steel. The beams are fixed at both ends; for a uniformly distributed load which will deflect least

a) cast iron 
b) aluminium 
c) steel 
d) hardened steel


Q47. Geneva mechanism is used for obtaining

a) Intermittent motion 
b) accelerating motion
c) continuous motion 
d) none


Q48. Effect of increase of outside diameter of a helical compression spring on its rigidity is

a) increased rigidity 
b) decreased rigidity
c) no effect 
d) dry friction


Q49. Jominey curve is related to the study of

a) hydraulics 
b) thermodynamics
c) electrical 
d) none


Q50. TTT diagram is used in

a) surface finish 
b) heat treatment
c) stress analysis 
d) thermodynamics


Q51. Mehanite is the name given to a type of

a) alloy steel 
b) granite
c) nodular cast iron 
d) cast iron


Q52. Unwanted impurity in molten aluminium is

a) oxygen 
b) carbon dioxide
c) nitrogen 
d) hydrogen


Q53. A force that averages 984 N is applied to a 0.42 kg steel ball moving at 13.8 m/s by a collision that lasts 0.027 s. If the force is in a direction opposite to the initial velocity of the ball, what is the final speed of the ball?


Q54. A stone initially at rest is dropped over the edge of a very tall building. Taking g as 10m/s2, what was the change in the speed of the stone building during the 4th second?

a) 10m/s
b) 30m/s
c) 15m/s
d) 40m/s 


Q55. How long will it take a 2000w motor to lift a 320kg container vertically upwards for 26m? (g = 9.8m/s2)


Q56. A collision between two isolated items will in generally conserve

a) the total kinetic energy and the total momentum of the system
b) the total kinetic energy but not the total momentum of the system
c) the total momentum but not the total kinetic energy of the system
d) the momentum of each object


Q57. How many of the following statements are true:

a) the buoyant force on a body depends on the shape of the body
b) the buoyant force on a body always acts in the same direction
c) the buoyant force on a body depends on the mass of the body
d) the buoyant force on a body depends on the density of the fluid surrounding the body


Q58. A body partially floats with 2/3rds of its volume under the surface of a fluid. If the density of the fluid is X kg/m3, what is the density of the body?

a) 3/2 X kg/m3 
b) 2/3 X kg/m3
c) 14.7 X kg/m3 
d) 0.15 X kg/m3


Q59. A 6kg ball is suspended from two wires of equal length. The angle between the wires is 90 degrees. What is the tension in each wire?


Q60. Piston of an IC engine is made out of

a) cast iron 
b) steel casting 
c) beryllium alloy 
d) aluminium alloy


Q61. The crank shaft of a 300 HP IC engine is

a) hot forged 
b) shell moulded 
c) cold forged 
d) obtained through investment casting


Q62. What is the force exerted on a submarine window of 2m2 area, if the submarine is at a depth of 2 km below the surface? (the density of sea water is 1.03 X 103 kg/m3).


  
   






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