| Post Name | ASSISTANT ENGINEER |
|---|---|
| Department | KERALA WATER AUTHORITY |
| Question Paper Code | 028/2016 |
| Date of Test | 13 February 2016 |
| Medium of Question | ENGLISH |
| Exam Type | OMR Examination |
| Total Questions | 100 |
1
A triangle lamina having a base 1 m and height 1.5 m is placed vertically under water with
the base parallel to the water surface and the base helow 3 m of water. The total force
exerted on one face is:
Answer
A. 18.394 kN ~
2
If the velocity potential function is given by φ = 3x − 4y, find the magnitude and direction of velocity at any point:
Answer
C. 5 m/s, 53° 7′
3
A jet of water 40 mm in diameter has a velocity of 25 m/s. Find the power of the jet:
Answer
B. 9.82 kW
4
Find the bed slope 'i' of a wide rectangular channel so that the flow to reach a given critical depth d_c and Manning's coefficient n:
Answer
D. i = gn²/d_c^(1/3)
5
The discharge available from a tube well is 120 m*/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 ts :
Answer
A. 160 ha
6
Lacey's formula for fixation of water way is:
Answer
B. 4.75√Q
7
An offset is laid out 2° from its true direction on the field. If the scale of plotting is 10 m to
l em, find the maximum length of the offset so that the displacement of the point on the
paper may not exceed 0.25 mm?
Answer
C. 7.16m
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
Answer
A. 433 m4
9
Asquare footing 2.5 m x 2.5 m is built in a homogeneous bed of sand of unit weight 20 kN/m*
and having an angle of shearing resistance of 36°. ‘The depth of the base of the footing 1s
| 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 N. =65.4, N, =49.4 and N, =54.0
Answer
D. 5462.5kN
10
. Hydrophobic cement is obtained by grinding ordinary Portland cement clinker with :
Answer
B. Oleic acid
11
How much initial slump is required for a concrete mix to be fluidised by plasticizers or super
plasticizers?
Answer
A. 2to3ecm
12
ISO: 800-2007 limits the values of width- thickness ratios of the elements of a steel section to
place a check on:
Answer
D. Local buckling
13
The shape factor of a square of side ‘a’ with its diagonal parallel to the ZZ axis is ;
Answer
A. 2
14
Minimum grade of concrete mix used for water retaining structures with alternate wetting
and drying :
Answer
B. M25
15
Minimum grade of concrete mix used for water retaining structures with alternate wetting and drying:
Answer
C. M 30
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:
Answer
C. 4825 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:
Answer
A. 8.333
18
A beam of span l carries a concentrated load P at mid span. Work done by the external load is:
Answer
B. P²l³/(96EI)
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:
Answer
C. 312.5kN
20
Find the shortest length L for a pin ended steel column having a cross section of 60 mm × 100 mm for which Euler's formula applies. Take Eₛ = 2 × 10⁵ N/mm² and critical proportional limit is 250 N/mm²:
Answer
D. 1639 mm
21
Which method of analysis of water distribution system is most suitable for long and narrow
pipe system?
Answer
C. Equivalent Pipe method '
22
For disinfecting water supply, it is required to treat 6,00,000 litres of daily supply with
0.6 ppm of chlorine. If the disinfectant is available in the form of bleaching powder containing
30% of available chlorine, the amount of bleaching powder required to treat the daily flow of
water 1s :
Answer
A. 0.833 ke
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 ν = 1.01 centi stokes. Settling velocity of settling particles is:
Answer
A. 0.027 cm/s
24
A main sewer is to be designed to receive a flow from | km? 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 ="). The design flow for the main sewer ts :
|
Answer
D. 9.0 mlpd :
25
At shut off head of a centrifugal pump, the discharge is :
|
Answer
B. Zero 7
26
The minimum dissolved oxygen which should always be present in water in order to save
aquatic life is :
Answer
C. 4ppm
27
Inthe case of surface water with a pH range of 6 to 8, which is the most suitable coagulant :
Answer
A. Alum
28
The pipe joint commonly used in pumping station are :
Answer
C. Flanged joint
29
The strength of chlorine in fresh bleaching powder is -
7
Answer
D. About 30% .
30
Estimated the quantity of secondary sludge produced by a secondary settling tank treating
sewage discharge of 3.5 mld. The-sludge may be assumed to have a solid concentration of
2()0 mg/l, removal efficiency of suspended solids as 90% and the solid content of the sludge as
G per cent : :
Answer
A. 10.5 cum/day |
31
The equation used for experimental measurement of viscosity is :
Answer
D. Hagen Poiseuille equation |
32
Bernoullis equation is derived starting from : |
Answer
Question Cancelled
33
Orificemeter is used for measuring - |
Answer
B. Flow rate |
34
Optical Pyrometer working principle is based on : |
Answer
A. Stefan-Boltzmann law
35
Froude number is directly proportional to:
Answer
D. Square of impeller speed
36
Centrifuging in Ball mills occur when the speed is :
Answer
Question Cancelled
37
Peclet Number NPe is the product of ;
Answer
B. Reynolds No. and Prandtl No.
38
LMTD correction factors are used for :
Answer
D. All the above three
39
Slugeing in fluidized beds occur when : |
| (A) Particles are large and heavy
(6B) The Vessel is narrow and the bed is deep
Answer
D. Both
40
Michaelis - Menten parameters can be evaluated using :
Answer
D. nor (B) (D) Both (A) and (B)
41
Inthe CGS system 1 stoke is defined as: |
Answer
D. lem*/s
42
Boiling Point Elevation of solutions strongly influences :
Answer
A. Capacity of multiple effect evaporators
43
At all humidities other than zero or hundred percentage, percentage humidity is :
Answer
C. Less than relative humidity ‘
44
Many important fermentation products like antibiotics are formed during :
Answer
C. Stationary phase
45
Dilution rate D for a bioreactor is the reciprocal of :
Answer
A. Space Time
46
Ficks law of diffusion is analogous to : |
Answer
C. Both
47
‘Temperature dependency of equilibrium constant is predicted by :
Answer
A. Vant Hoff Equation
48
Inan ideal PFR, the reactant concentration :
Answer
C. varies along the length of the reactor |
49
Baffles in shell and Tube heat exchangers are provided mainly for :
Answer
A. Increasing shell side turbulence
50
Conversions in reversible exothermic reactions can be improved by : |
Answer
B. Interstage Cooling
51
Frossling correlation relates mass transfer coefficient with : |
Answer
D. All the above three
52
Knudsen diffusivity is ; |
Answer
B. Independant of pressure
53
Crushing Rolls are:
Answer
Question Cancelled
54
Differential method of analysis of kinetic data 1s :
Answer
Question Cancelled
55
Rate Selectivity parameter is important in the design of :
Answer
A. Multiple reactions |
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 :
Answer
A. 31.9
57
One kilogram of water is heated from 20°C to 90°C. If the specific heat of water. is
4.186 kJ/keK, the entropy change occurred assuming constant specific heat in kd/keK is :
Answer
D. 0.8958
58
The volume flow rate of a water jet striking a flat plate placed normal to its path is 0.06 m‘/s
and exerts a force of 985 N. Considering the density of water as 1000 Kg/m', the diameter in
mm of the water jet is:
Answer
B. 70
59
In order to have maximum power from a Pelton turbine, the bucket speed must be :
Answer
B. Equal to half the jet speed
60
Heat and work are:
Answer
A. Path functions
61
Air at 20°C blows over a hot plate of dimensions 50 × 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:
Answer
D. 2
62
Ina 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 : ;
Answer
B. 28.8°C
63
The work done in kJ/kg to pump water isentropically from 100 KPa and 30°C to 5 MPa ata
constant specific volume of 0.001021 m/kg neglecting the changes in kinetic energy and
potential energy is :
Answer
A. 5
64
A refrigerator takes an electrical power of 150 Watts and rejects 450 Watts to surrounding tie
air. The coefficient of performance of refrigerator is:
Answer
D. 2
65
Which one of the following is a CFC refrigerant?
Answer
C. R502
66
Tooth interference in an external involute spur gear pair can be reduced by: |
Answer
B. Increasing pressure angle
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 : :
Answer
C. 800rpm
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 :
Answer
Question Cancelled
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 : |
Answer
A. Isochronism
70
‘The gyroscopic couple of a suspended dise 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:
Answer
A. 0.35
71
The fraction of unbalanced mags used for primary balancing of a reciprocating engine is :
Answer
C. 0.6
72
Ifthe balancing mass of a locomotive wheel is 15 kg acting at a radius of 0.7 m when the
wheel has dead weight of 110 kg, the limiting rotational speed of the wheel in rad/sec to avoid
lifting from rails is close to :
Answer
Question Cancelled
73
' 7%. The crystal structure of austenite is :
Answer
B. Face centered cubic
74
The maximum energy that can be absorbed per unit volume without creating ‘a permanent
distortion in a material is known as:
Answer
A. Modulus of resilience
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 mm/min is close to: ,
Answer
B. 2610.8
76
The welding processes which uses non-consumable electrode is :
Answer
C. Gas tungsten arc welding
77
Internal gear cutting operation can be performed by :
Answer
Question Cancelled
78
For a damped vibrating system, when the critical damping coefficient is less than the
damping coefficient, the system is said to be ;
Answer
B. Over-damped eet
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 1s.
Answer
C. 600
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.
Answer
A. 1
81
Who was the President of Indian Constituent Assembly? :
Answer
C. Dr. Rajendra Prasad
82
The first amendment of Indian Constitution came into force on: ,
Answer
A. 18-6-1951
83
Inthe Parliamentary system of India, the executive is subordinated to ;
:
Answer
B. Legislature
84
Who is the founder of PRDS?
Answer
B. Poykayil Srikumara Devan
85
Who helped the Vaikom Satyagrahis by opening a free kitchen for them?
Answer
C. Akalis
86
The women K.P.C.C. President who lead the Quit India and Civil disobedience movements :
Answer
B. Kutty Malu Amma
87
The author of the work ‘Odakkuzhal’ who won the ‘Njanapeetom’ Award :
-
Answer
C. G.Sankara Kurup.
88
Who was the leader to become the head of the Radio Broadcast division of Indian
Independent League’
_
Answer
C. K.P. Kesava Menon
89
Who visited Mahathma Gandhi at Thirunelvely in 1921 :
Answer
C. T.K. Madhavan
90
Where was the first SNDP meeting convened?
Answer
D. Aruvippuram
91
Birth place of Saint Kusiako Elias Chavara ;
Answer
C. Kainakary
92
Which Newspaper was founded by Vakkom Moulavi?
Answer
B. Swadeshabhimani
93
Kumaran Asan’s Veena Poovu was first published in:
Answer
Question Cancelled
94
Malayali Memorial Memorandum waa aubmitted to :-
;
Answer
A. Sree Moolam Thirunal
95
Which one is not a work of Changampuzha? ,
|
Answer
C. Kilikonchal
96
The Historic struggle lead by Chattampy swamikal to join scheduled class students to
| government schools occurred in which place :
|
Answer
Question Cancelled
97
How many members are there in the Kerala legislative assembly?
Answer
B. 141 |
98
What is the percentage of seats reserved for women in the Kerala local self government
elections? ,
|
Answer
C. 60
99
Who founded the first college in Kerala? !
|
Answer
D. CMS.
100
Mannathu Padmanabhan was the president of which Devaswom board?
Answer
A. Travancore
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