Time : 1 hour and 15 minutes

1.A triangle lamina having a base 1 m and height 1.5 in is placed vertically under water with the base parallel to the water surface and the base below 3 m of water. The total force exerted on one face is :
(A)18.394 kN   (B)18.394 kg
(C )36.788 kN   (D)15.234 kg

2.IF the velocity potential function is given by φ
 = 3x-4y, find the magnitude and direction of velocity at any point:
(A)4.87 m/s, 45°   (B)5 m/s. 38° 3'
(C )5 m/s. 53° 7'   (D)7 m/s, 61°7'

3.A jet of water 40 mm in diameter has a velocity of 25 m/s. Find the power of the jet: 
(A) . 10.81 kW‘ (B) 9.82 kW
(C )10 kW        (D) 4.35 kW

4.Find the hed slope 'i' of a wide rectangular channel so that the flow to reach a given critical depth dc and Manning’s coefficient n : 
  
 
5.The discharge available from a tube well is 120 m3/hr. Assuming 3200 h of working of the tube well for a year, the intensity of irrigation as 50% and average depth of Rabi and Kharif crop as 48 cm, the culturable area that this tube well can command is :
(A)160 ha
(C ) 168 ha

6.Lacey’s formula for fixation of water way is : 
(A) V = 0.55 y0 64 (C ) Q=KAi

7.An offset is laid out 2° from its true direction on the field. If the scale of plotting is 10 m to 1 cm, find the maximum length of the offset so that the displacement of the point on the paper may not exceed 0.25 mm?
(A)5.0 m  (B)G.l2m
(C )7.16 m' (D)8.16 m

8.The following perpendicular offsets were taken at 10 m intervals from a survey line to an irregular boundary line:
3.25, 5.6, 4.2, 6.65, 8.75, 6.2, 3.25,4.2, 5.65/ Calculate the area by trapezoidal rule 
(A)433 m2         (B)439.67 m2
(C )424.44 m2      (D)440 m2

9.A square footing 2.5 m x 2.5 m is built in a homogeneous bed of sand of unit weight 20 kN/m3 and having an angle of shearing resistance of 36°. The depth of the base of the footing is 1.5 m below the ground surface. Calculate the safe load that can be carried by a footing with a factor of safety 3 against complete shear failure?
Bearing capacity factors Nc =G5.4, Nq =49.4 and Nr =54.0
(A)4325 kN   (B)4927.5 kN
(Q5319.6 kN  (D)5*462.5 kN

10.Hydrophobic cement is obtained by grinding ordinary Portland cement clinker with :
(A) Hydrochloric acid  (B) Oleic acid
(C )Glicerine           (D)Acetol

11.How much initial slump is required for a concrete mix to be fluidised by plasticizers or super plasticizers?
(A)2 to 3 cm  (B)2 to 3 mm
(C )5 cm       (D)10 mm

12.ISO: 800-2007 limits the values of width-.thickness ratios of the elements of a steel section to place a check on :
(A)Bending buckling              (B)Torsional buckling
(C )Flexural torsionalbuckling    (D)Ixcalbuckling

13.The shape factor of a square of side ‘a’ with its diagonal parallel to the ZZ axis is :
(A)2     (B)1.7
(C )2.343 (D)2V2 

Strength of a 20 mm diameter bolt of grade 4.6 for a single cover butt joint. The cover plate being 10 mm thick. Assume steel of grade Fe 410, /u=410 MPa, for bolts of grade 4.6, fub =400 MPa, Partial safety factor for the material of the bolt ymb = 1.25 and net tensile 
  
 
15.Minimum grade of concrete mix used for water retaining structures with alternate wetting and drying:
(A)M 20  (B) M 25
(C )M 30  (D)M 35 .

16.A hook 12 mm diameter is embedded in concrete for a distance of 100 mm. Calculate the maximum load which the hook can carry if the bond stress is not to exceed 1.28 N/mm2 :
(A)5100 N' (B) 415 N
(C )4825 N  (C )5000 N

17.Year’s purchase for an old building if its future life is 15 years and the rate of interest is 7% on capital and 4% for sinking fund :
(A)8.333   (B)9.231
(C )10.11   (D)10.21

18.A beam of span / carries a concentrated load P at mid span. Work done by the external load is: 
   
19.A three hinged arch of span 20 m and rise 4 m carries a uniformly distributed load of 25 kN/m. Horizontal thrust is :
(A)250 kN     (B)500 kN
(C )312.5 kN   (D) 425 kN

Find the shortest length L for a pin ended steel column having a cross • section of 60 mm x 100 mm for which Euler’s formula applies. Take Es = 2x 105N/mm2 and critical proportional limit is 250 N/mm2:
(A)6000 mm     (B)2500 mm
(C )2000 mm 4   (D) 1639 mm
 
21.Which method of analysis of water distribution system is most suitable for long and narrow pipe system?
(A) Circle method           (B) Hardy Cross Method
(C ) Equivalent Pipe method  (D) Electrical Analysis method

22.For disinfecting water supply, it is required to treat 5,00,000 litres of daily supply with 0.5 ppm of chlorine. If the disinfectant is available in i he form of bleaching powder containing 30% of available chlorine, the amount of bleaching powder required to treat the daily flow of water is:
(A)0.833 kg  (B).0.916 kg
(C )0.918 kg  (D)None

23.In water treatment settling unit, water having a temperature of 20 Degree Centigrade carries solid particles with average diameter of 0.05 mm and specific gravity 1.20. Given y = 1.01 centi stokes. Settling velocity of sottling particles is :
(A)0.027 cm/s  (B)3.1 mm/s
(C )2.73 cm/s   (D)0.21 mm/s

24.A main sewer is to be designed to receive a flow' from 1 km2 area of a community where the population density is 200 persons/ha. The average sewage flow is 150 litres per capita per day. Assume peak factor =‘,3. The design flow for the main sewer is :
(A)7.934 mlpd‘  (B)8.13 mlpd
(C )10.0 mlpd’   (D) 9.0 mlpd

25.At shut off head of a centrifugal pump, the discharge is :
(A)Maximum           (B)Zero
(C )Rated Discharge  (D)None

26.The minimum dissolved oxygen which should always be present in water in order to save aquatic life is :
(A)1 ppm   (B)40 ppm
(C )4 ppm   (D)10 ppm

27.In the case of surface water with a pH range of 6 to 8, which is the most suitable coagulant:
(A)Alum   (B)Quick lime
(C )Lime   (D)PotassiumPermanganate

28.The pipe joint commonly used in pumping station are :
(A)Flexible joint   (B)Expansion joint
(C )Flanged joint    (D) Socket and spigot joint 

29.The strength of chlorine in fresh bleaching powder is :
(A)About 60%  (B)About 10%
(C )About 20%  (D)About 30%

30.Estimated the quantity of secondary sludge produced by a secondary settling tank treating sewage discharge of 3.5 mid. The sludge may be assumed to have a solid concentration of 200 mg/1, removal efficiency of suspended solids as 90% and the solid content of the sludge as 6 per cent:•
(A)10.5 cum/day
(B)8.3 cum/day
(C )9.1 cum/day
(D)7.93 cum/day

31.The equation used for experimental measurement of viscosity is :
(A)Darcy equation       (B)Stokes equation
(C )Fanning equation     (D)Hagen Poiseuillc equation 
 
47.Temperature dependency of equilibrium constant is predicted by :
(A)Vant Hoff Equation   (B)Clayperon Equation
(C )Raoults law          (D)Arrhenius Equation

48.In an ideal PFR, the reactant concentration :
(A)is uniform within the reactor
(B)varies along the cross section of the reactor
(C )varies along the length of the reactor
(D)none of the above

49.Baffles in shell and Tube heat exchangers are provided mainly for :
(A)Increasing shell side turbulence  (B)Increasing tube sideturbulence
(C )Fixing the tubes                  (D)Fixing the tie rods .

50.Conversions in reversible exothermic reactions can be improved by :
(A)Interstage Heating (B)Interstage Cooling
(C )Isothermal Operation (D)Isobaric operations

51.Frossling correlation relates mass transfer coefficient with :
(A) Particle size (B) Particle velosity
(C ) Mass diffusivity (D) All the above three

52.Knudsen diffusivity is :
(A)Directly proportional to pressure
(B)Independant of pressure
(C )Proportional to square root of pressure
(D)Inversely proportional to pressure

53.Crushing Rolls are :
(A) Primary crushers (C ) Ultrafine grinders

54.Differential method of analysis of kinetic data is :
(A) Complex but accurate (B) Simple and accurate
(C ) Complex and inaccurate (D) Simple and inaccurate

55.Rate Selectivity parameter is important in the design of:
(A) Multiple reactions (B) Single reactions
(C ) Elementary reactions (D) None of the above 

56.A U-tube manometer is connected to a vessel to measure the pressure inside. If mercury is the working fluid of manometer, the height difference between two columns of the manometer measured is 24 cm, the pressure inside the vessel in kPa is :
(A)31.9 (B) 49.1
(C )3.1 (D) 10.4

57.One kilogram of water is heated from 20°C to 90°C. If the specific heat of water. is 4.186 kJ/kgK, the entropy change occurred assuming constant specific heat in kJ/kgK is :
(A) 0.0786‘ (B) 9.53219.5321
(C )98.1773 (D)0.8958

58. The volume flow rate of a water jet striking a flat plate placed normal to its path is 0.06 m3/s and exerts a force of 935 N. Considering the density of water as 1000 Kg/m3, the diameter in
mm of the water jet is :’
(A)(A)46 (B) 7070
(C ) 3838 (D) 9797

In order to have maximum power from aPelton turbine, the bucket speed must be 
(A)Equal to the jet speed (B)Equal to half the jet speed
(C )Equal to twice the jet speed (D)Independent of the jet speed 

Heat and work are :

(A)Path functions (B) Extensive propertiesExtensive properties
(C )Point functions (D)Intensive properties


61. Air at 20°C blows over a hot plate of dimensions 50 x 60 cm maintained at 250°C. If the convection heat transfer coefficient is 29 W/m2°C, the heat transfer took place in kW is :
(A) 36.6 (B) 14
(C ) 8 (D) 2

62. In a condenser of a power plant, the steam condenses at a temperature of 70°C. The cooling water enters at 30°C and leaves at 50°C. The logarithmic mean temperature difference of the condenser is:
(A) 24.2°C (B) 28.8°C
(C ) 20.6°C (D) 37.5°C

The work done in kJ/kg to pump water isentropically from 100 KPa and C to 5 MPa at a constant specific volume of 0.001021 m3/kg neglecting the changes in kinetic energy and potential energy is:
(A) 5 (B) 38
(C ) 232 (D) 84 

66.Tooth interference in an external involute spur gear pair can he reduced by;
(A)Decreasing center distance between gear pair
(B)Increasing pressure angle
(C )Decreasing module
(D)Decreasing number of gear teeth

67.The following data refers to two crossed helical gears used for speed reduction. Gear I: Pitch circle diameter in the plane of rotation 80 mm and helix angle 30°. Gear II: Pitch circle diameter in the plane of rotation 120 mm and helix angle 22.5°. If the input speed is 1280 rpm, the output speed in rpm is :
(A)900 rpm (B) 950 rpmrpm
(C )800 rpm (D)850rpm

68.A clutch has outer and inner diameters 100 mm and 40 mm respectively. Assuming a uniform pressure of 2 MPa and coefficient of friction of liner material 0.4, the torque carrying capacity of clutch is :
(A)148 Nm (B)490Nm
(C )372 Nm (D)196Nm

69.If the equilibrium speed of a governor is constant for all radii of rotation of the fly balls within the working range, it is known as :
(A) Isochronism (B) Hunting
(C ) Insensitive ness (D) Stability

70.The gyroscopic couple of a suspended disc rotating at 1000 rpm is 15 N-m and the moment of inertia is 0.4 kg-m2, then the precession velocity of the disc in rad/sec is close to :
(A)0.35 (B)35
(C )8.5 (D)0.0375

71.The fraction of unbalanced mass used for primary balancing of a reciprocating engine is : 
(A) 0.2 (B) 0.9
(C ) 0.6 (D) 0.05 

75.A stainless steel rod of 10 mm diameter id being reduced to 9 mm by turning on a lathe. If the spindle rotates at 360 rpm and the tool travel rate is 175 mm/min, the material removal rate in mm3/min is close to:
(A) 1034.6 (B) 2610.8
(C ) 874.4 (D) 856.9

76.The welding processes which uses non-consumable electrode is :
(A) Gas metal arc welding (B) Submerged arc welding
(C ) Gas tungsten arc welding (D) Flux coated arc welding

77.Internal gear cutting operation can be performed by :
(A) Milling (B) Hobbing
(C ) Shaping with pinion cutter (D) Shaping with rack cutter

78.For a damped vibrating system, when the critical damping coefficient is less than the damping coefficient, the system is said to be :
(A) Under-damped (B) Over-damped
(C ) Critically-damped (D) Undamped

79.If two nodes are observed at a frequency of 1200 rpm during whirling of a simply supported long slender rotating shaft, the first critical speed of the shaft in rpm is.
(A) 1800 (B) 400
(C ) 600 (D) 2400

80.A thin walled spherical shell is subjected to an internal pressure. If the radius of the shell is increased by 1%, with the internal pressure remaining the same, the percentage change in the hoop stress is.
(A)1 (B) 1.25
(C )3 (D) 2. 
 
92.Which Newspaper was founded by Vakkom Moulavi?
(A)Deshabhimany (B)Swadeshabhimani
(C )Samvad Kaumudi (D)Mathrubhoomi

93.Kumaran Asan’s Veena Poovu was first published in :
(A)Bhaahaposhini (B)Mangalodayam
(C )Nasrani Deepika (D)Prabhntham

94.Malayali Memorial Memorandum was submitted to :• 
(A) Sree Moolam Thirunal  (B)Sree Ayilyam  Thirunal
(C ) Sree Avittam Thirunal (D)Sree chithira Thirunal

95.Which one is not a work of Changampuzha?
(A) Ramanan (B) Rakthapuhspangal
(C ) Kilikonchal (D) Mayookhamala

96.The Historic struggle lead by Chattampy swamikal to join scheduled class students to government schools occurred in which place :
(A) Olakettiyambalam (B) Ooruttambalam
(C ) Vellavambalam (D) Vazhiyambalam

97.How many members are there in the Kerala legislative assembly? 
(A)MO (B)141
(C )142 (D) 143 

 
100.Mannathu Padmanabhan was the president of which Devaswom board? 
(A) Travancore (B) Malabar
(C )Guruvayoor (D) None of the above