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Thermax Aptitude Paper 2015

Posted on :29-02-2016
Thermax Placement Paper:-

Section 1 - Technical:-

Q1. Hysterisis loss is least affected by -

A. Temperature
B. Frequency
C. Weight
D. Density


Q2. The ladder will not be in equilibrium if

A. floor surface is smooth and wall surface is rough 
B. floor surface is rough and wall surface is rough
C. floor surface is smooth and wall surface is smooth
D. floor surface is rough and wall surface is smooth


Q3. Effect of cavitation in Turbines -

A. Noise and Vibration
B. Efficiency
C. Decrease in life of blades
D. All the above


Q4. Washer is used:

A. to avoid wear
B. to absorb vibration 
C. to protect bearing surface

ANS: A


Q5. Elasticity of a fluid is measured by

A. Modulus of Elasticity
B. Rigidity Modulus
C. Bulk Modulus
D. None of the above


Q6. Compression ratio of the C.I. Engine

A. 8 to 10
B. 10 to 15
C. 16 to 20
D. None 


Q7. Jigs are used for

A. turning
B. milling
C. drilling
D. grinding


Q8. First law of Thermodynamics deals with

A. Conservation of Mass
B. Conservation of Momentum
C. Conservation of Energy
D. Conservation of Heat


Q9. Which structure can be viewed by Naked Eye?

A. Micro Structure
B. Grain
C. Macro
D. Atomic


Q10. Thermal Conductivity of Water ------- with increase in temperature.

A. Increases with temperature
B. Decreases then increases
C. Increases then Decreases
D. Does not change


Q11. In which type of welding, chemical reaction takes place?

A. Resistance
B. Thermit
C. Forge
D. Gas


Q12. Expansion valves are used in pipes carrying ----

A. Water
B. Steam
C. Viscous fluid
D. Air at high pressure


Q13. Fusible plug is used -----

A. To control steam temperature.
B. To put off the fire when the water level in the boiler falls below the alarming limit
C. To avoid Explosion


Q14. A fly wheel starts from rest and accelerates uniformly and reaches 25 rpm in 3 seconds. What will be the angular velocity(in rpm) after 10 seconds?

A. 20
B. 25
C. 45
D. 50


Q15. Idling mixture in Petrol Engines are ----

A. Rich
B. Lean
C. Variable


Q16. When the Ice cubes present in the glass of water get melted, what will happen to the level of water ----

A. Increases
B. Decreases
C. Does not change


Q17. In coal refineries magnets are used to separate ----.

A. dust
B. iron particles 
C. Sand
D. All the above 


Q18. Resistance to fatigue strength is measured by

A. Tensile Test
B. Shear Test
C. Endurance Limit


Q19. Thermal Conductivity of Solids ----- with increase of temperature.

A. Increases
B. Decrease
C. Increases then Decrease
D. Unpredictable


Q20. Statistical processing is done to 

A. improve the quality
B. maintain the quality
C. both 1 and 2
D. to increase the profit


Q21. Radio active materials emit -------

A. alpha
B. beta
C. Gamma
D. All the above


Q22. ON/OFF Control application Valve -

A. Ball valve
B. Globe valve
C. Needle valve
D. Butter fly valve


Q23. Radiator is made up of -----

A. Brass
B. Steel
C. Plastic
D. Cast Iron


Q24. Heat treatment of steel changes

A. Physical
B. Chemical
C. Mechanical properties


Q25. Compiler is used 

A. To convert High level programmes to the Language understandable by machines
B. To convert the programmes from Digital to Analog.
C. To compile the instructions in registers.
D. Both B & C


Q26. Manometer is effective for

A. High pressure
B. Very High pressure
C. Low pressure
D. None of the above


Q27. Which of the following has the maximum Head?

A. 33 inches Hg
B. 756 mm of Hg
C. 31.6 m of water 
D. 1.013 kg/sq.cm


Q28. The oil of sp. gravity 0.9 and water are kept in two identical vessels, then the Hydro static Pressure at bottom of oil will be

A. More than pressure of the water at the bottom
B. Less than pressure of the water at the top
C. Same
D. Insufficient data


Q29. High moisture content in the last stage of turbine will cause

A. Corrosion
B. Low thermal efficiency
C. Low Blade life 
D. All the above


Q30. Chip breakers are used ---

A. To permit small chips 
B. to increase tool life
C. For Safety


Q31. What will happen to the specific volume of the water when it is heated from 0 degree Celcius?

A. Increases
B. Decreases
C. Remain Constant


Q32. Where the bending stress is maximum for I Section Beam?

A. Neutral axis
B. At the joint of wedge and flank
C. where the shear stress is maximum
D. Outer most of the fibres


Q33. Heat is a substance of 

A. internal energy 
B. thermal conductance 
C. enthalpy 
D. entropy


Q34. Grove is given in which welding?

A. fillet 
B. butt 
C. lap 
D. both fillet and lap


Q35. Pressure vessels are made by---

A. welding
B. rivet 
C. both 
D. none of the above

ANS: A


Q36. A carbon bar is of length 10m. Its temperature increased from 30C to 330C. What is the expansion degree?

A. 300 
B. 30 
C. 10 
D. 100


Q37. For close transmission, which of the following fit is used?

A. transition 
B. interference 
C. clearance 
D. none of the above


Q38. Calorie is a unit of

A. Specific heat 
B. Quantity of heat


Q39. Heat is supplied at 30,000 J/s and output of 90kw. What is the thermal efficiency of the heat engine?

A. 30% 
B. 33% 
C. 40% 
D. 50% 
E. 50%


Q40. Corrosion resistance of steel increases by

A. Cr,W,Va,Mo 
B. Cr 
C. Cr,Ni


Q41. Cp / Cv of Gas ---- at varying temperatures.

A. Constant
B. Increases
C. Decreases


Q42. The state of the refrigerant in the vapour compression cycle before throttling ----.

A. Wet
B. Dry


Q43. Feuler gauges are used to measure the ----.

A. clearance
B. density
C. dust particle content


Q44. Reason for slipping when we walk on the Ice

A. Ice surface is smooth
B. When we apply pressure on the Ice it gets melted


Q45. Purpose of conducting Tensile Test

A. Ductility
B. Resistivity
C. Capacity
D. Impedence



Section 2 - Data Sufficiency:- 
Find the answer using given two options:

Q46. What is the average speed of A & B?

a) A travels 4 miles / hour more than B
b) A travels 60 meters


Q47. How many Brothers does Mohan have?

a) Mohans sisters are twice as Brothers
b) Mohans uncle has one Nephew


Q48. One man got Birthday gift.

a) He got twice the amount of gift on that Birthday
b) Number of gifts received is 4 fewer than he received on third birthday


Q49. How many times is the calorific value of Bread greater than the apple?

a) Bread is 1/2 times more than Banana
b) Banana is 3 times more than Apple
 

Q50. If x=y^2 then x^2-y=?

a) x + y = 2
b) x = 4


Q51. If K-1 is a square and K<17, what is K?

a) K is even
b) K is odd


Q52. In an election P, Q, R are the contestants. They got the votes as follows. Can you find out who got the majority votes?

a) P= (4/3)* P
b) Q= (2/3)*R


Q53. Amar, Akbar, John & King have joined one Team each. Who joined football?

a) Not more than three joined one game.
b) Amar & Akbar joined Base Ball, King joined Basket ball .


Q54. Find an average speed of the two men.

a) Speed of one man = 100 kmph
b) Distance traveled by another man = 25 km.


Q55. What is the area of the unoccupied by the triangle if the triangle is completely inside the square?

a) A triangle compactibility inside the square
b) Area relation


Q56. What is the % of X in Y?

a) X=Y/4
b) X + Y = 200


Q57. What is the price per unit rise during 1976 from 1975?

a) More units were sold in 1976 than 1975
b) There was 5% decrease in 1976 than 1975


Q58. There are 12 marbles, Red, Blue & Green. Find the number of Red marbles.

a) Number of red marbles is greater than the Blue and Green
b) Number of Blue marbles are twice as that of the Green marbles


  
   






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