| Post Name | NAVAL ARCHITECT |
|---|---|
| Department | PORT |
| Question Paper Code | 050/2018/OL |
| Category Code | 010/2016 |
| Date of Test | 9 October 2018 |
| Medium of Question | ENGLISH |
| Exam Type | Online Examination |
| Total Questions | 100 |
1
From whom Sri Narayana Guru came to know about the attainments of Thycaud Ayya?
Answer
C. Chattampi Swamikal
2
Who among the following was elected as the President of Indian National Congress in 1939 by its session at Tripura?
Answer
A. Subhash Chandra Bose
3
Subhash Chandra Bose organized his 'Tiger Legion' at
Answer
C. Germany
4
Satya Shodak Samaj was founded by
Answer
D. Jyotibha Phule
5
Debrigarh Wildlife Sanctuary is located in
Answer
B. Odisha
6
In which year Savarkar organized the revolutionery organization called Abinav Bharat Society?
Answer
A. 1904
7
The oldest oil field in India is located at
Answer
C. Assam
8
The 12th Five Year Plan completed its term in
Answer
A. March 2017
9
According to Keralolpathi tradition, how many original village settlements are established in Kerala by Parashurama?
Answer
D. 32
10
The regulations made during the period of Naduvazhis in Kerala to administer the temple properties were known as
Answer
B. Kacham
11
The terms 'Deiva Sanrorkal', 'Neeti Sanrorkal' and 'Desai Ventra Sanrorkal' are associated with
Answer
D. Vaikunda Swamikal
12
Thycaud Ayya became a member of the ____________ in Chennai, which was a congregation of scholars who discussed the matters related to spirituality.
Answer
A. Ashtapadana Sabha
13
Chattampi Swami's version of monism is explained in his work called
Answer
D. Advaitachintha Padhathi
14
Which among the following works of Sri. Brahmananda Sivayogi gives an elaborate description of the eight types of yoga?
Answer
B. Mokshapradypa
15
The 2018 Men's Hockey Champions Trophy has won by
Answer
A. Australia
16
Kazuo Ishiguro, the Nobel Prize winner for literature of 2017 belongs to
Answer
C. Japan
17
On which occasion Sri. Narendra Modi launched the Van Dhan Scheme of Ministry of Tribal Affairs?
Answer
A. Ambedkar Jayanti
18
The brain behind the 'Chittagong Armoury Raid' was
Answer
B. Surya Sen
19
India's first Aviation Multiskill Development Centre was launched in
Answer
D. Chandigarh
20
Which movies among the following was mistakenly announced as best picture in the Oscar of 2017?
Answer
B. La La Land
21
The following holds true for block coefficient (C_B) of a vessel
Answer
A. C_B ≤ 1.0
22
The girth till load water line is measured at several stations along the length of the ship. The integration of girth will give the following parameter:
Answer
D. Wetted surface area
23
The section area curve for a 8.0 m load water line is drawn. The integration of section area curve will give the following parameter for 8.0 m loadwater line:
Answer
C. Vessel's displacement
24
A vessel is in the form of a triangular prism 32 m long, 8 m wide at the top and 5 m deep. KG = 3.7 m. The initial metacentric height when vessel is floating on an even keel at 4 m draft (forward and aft) is:
Answer
A. GM_T = 0.68 m
25
A ship of 6000 metric tonnes displacement has KM_T = 7.3 m, KG = 6.7 m and is floating upright on an even keel. A weight of 60 metric tonnes already on board is shifted 12.0 m transversely. The resultant list will be
Answer
B. 11.31°
26
A ship 120 metres long at the waterline has equidistantly spaced half ordinates commencing from forward as follows: 0, 3.7, 5.9, 7.6, 7.5, 4.6, 0.1 meters, respectively. The area of the waterline and the TPC (Tonnes Per cm Immersion) at this draft are:
Answer
B. 1207 m², 12.37 Metric Tonnes
27
Simpson's (3h)/8(y₁+3y₂+3y₃+y₄) integration rule assumes that the equation of the curve is of the form:
Answer
A. a₀+a_1x+a_2x²+a_3x³
28
The following relation holds true:
Answer
A. Reynolds number = Inertial force / Viscous force
29
The following relation holds true:
Answer
D. (1) and (2)
30
The following is true of a truss structure:
Answer
C. (1) and (2)
31
It is desired to apply high tensile steel to ship structure to reduce lightship weight and increase longitudinal strength. The preferable locations where the high tensile steel shall be used in midship section is:
Answer
D. (1) and (2)
32
A rectangular barge is floating in water in even keel. Two objects, each of them of mass m, are shifted away from midship towards the forward and aft end of the barge. There is no change in draft and trim of the vessel. The bending moment acting on the vessel will:
Answer
C. Insufficient information
33
In a LNG tanker spherical shaped independent cargo tanks are provided. Will the independent cargo tank's scantlings contribute to midship section modulus of the LNG carrier?
Answer
B. No
34
The following holds true for Type A and Type B freeboard in the context of load line regulations.
Answer
D. (1) and (2)
35
All transverse and longitudinal bulkheads (water tight and oil tight) used for subdivision of the ship extend until this deck
Answer
C. (1) and (2)
36
The term "Floodable length" is used in the context of:
Answer
D. Damage stability
37
The purpose of slop tank in an oil tanker is:
Answer
A. To store oil and water mixture after crude oil washing of the cargo tank
38
A vessel's "minimum bow height" requirement is greater than the "freeboard". The vessel's operating requirements does not permit it to have sheer. What alternative design option is available for complying with loadline regulation?
Answer
C. (1) and (2)
39
The damage stability computation of a loaded oil tanker considers the following aspects:
Answer
D. (1), (2) and (3)
40
For a loaded double hull oil tanker, a damage situation where oil will not be released out in the sea.
Answer
A. Only breach of outer hull
41
The following is correct for Type A, Type B and Type C independent tanks in the context of liquefied gas carriers:
Answer
A. Type A: LPG carrier, Type B: LNG carrier, Type C: Pressure vessel
42
A pure car carrier has a weather tight foldable closing ramp installed on the side shell at the aft. The lowermost opening of the ramp will be above which deck?
Answer
C. (1) and (2)
43
For which type of ship the concept of "alternate hold loading" is employed?
Answer
A. Bulk carrier
44
What is sloshing? For which ship type this phenomenon is critical?
Answer
D. (1) and (3)
45
The inert gas is mandatorily used onboard the following ship types:
Answer
B. Oil tanker and gas carrier
46
The term "angle of repose" is relevant for which ship type and which ship structure?
Answer
A. Bulk carrier. Top side hopper tanks
47
The terms "skew" and "rake" are used in the design of following item
Answer
D. Propeller
48
Name the two gases whose emissions are restricted from the ship as per MARPOL regulation.
Answer
A. NO_X, SO_X
49
Grain stability rules are applicable for the following:
Answer
C. While loading bulk grain in a bulk carrier
50
The following requirements shall be satisfied by damaged GZ curve of a passenger ship.
Answer
D. (1), (2) and (3)
51
The criterion of service numeral (C_S) for passenger ship is computed as C_S =72 ((M+2P))/(V). What will be the value of P if all the passenger cabins are above the bulkhead deck?
Answer
A. 0
52
A vessel has draft lines corresponding to Tropical (T): 23.96 m, Summer (S): 24.48 m, Winter (W): 25 m. If all the numeral values are correct, the following may be the correct draft combination:
Answer
B. T: 25 m, S: 24.48 m, W: 23.96 m
53
A passenger ship has loadline draft corresponding to two different criterion of service, C₁: 8.5 m, C₂: 7.8 m. The ship is loaded to its maximum permissible drafts at following two loading condition (a) 1200 passengers, 500 MT cargo, (b) 750 passengers, 550 MT cargo. Pair the drafts C₁ and C₂ with loading conditions (a) and (b).
Answer
C. C₁: 750 passengers, 500 MT cargo; C₂: 1200 passengers, 550 MT cargo
54
A vessel has a beam: 60 m, depth: 30 m and draft: 24 m. The double hull water ballast tank is 3.0 m wide on the side. A straight air pipe is at a height of 800 mm from the main deck. The air pipe permits water to enter tank when submerged. What will be the minimum down flooding angle for the vessel?
Answer
D. 14.13°
55
As per gas carrier ship regulation, the probability of exceeding permissible stress limit <10⁻⁸ for acceptable structural design. The permissible stress for mild steel is 235 N/mm². There are two structural designs. In (a) Probability (stress ≥ 245 N/mm²)=10^(-7.8), and in (b) Probability (stress ≥ 235 N/mm²)=10^(-9.2). Which one of the design is acceptable?
Answer
A. Only (b)
56
The fatigue load needs to be estimated corresponding to 10⁸ wave encounters through the operating life of a ship. For shipbuilding steel, the S-N curve (variation of maximum permissible stress amplitude against number of load cycles) characteristics shall be available till:
Answer
D. Number of cycles: 10⁸
57
A liquid hydrogen carrier is designed for 500 thermal cycles during its service life. 5% of the thermal cycles, correspond to cargo temperature to 45°C and the balance correspond to cargo temperature to -100°C. Cargo (Liquid hydrogen) temperature -253°C. 45°C and -100°C temperatures may correspond to which operating conditions:
Answer
A. 45°C: Drydocking and -100°C: Ballast voyage, -253°C: loaded voyage
58
A floating LNG terminal is designed to be permanently moored off the Nigerian coast. The probability of occurrence of the waves (H_s (m, significant wave height)/ T_p (sec, mean wave period)/p (probability)) are (a) 6.3 / 8 / 0.05 (b) 9.3 / 10 / 0.05 (c) 6.5 / 12 / 0.1 (d) 5.5 / 16 / 0.2 (e) 7.4 / 16 / 0.05 (f) 11.6 / 16 / 0.05 (g) 1 / 12 / 0.25 (h) 2 / 12 / 0.25. The design criteria is, probability (stress level > 235 N/mm²) <10⁻⁸. Bending stress on the structure is estimated by numerical simulation using random wave for each one of the above wave condition. The random wave is generated using the wave spectrum suitable for the geographical region. The probabilities (stress level > 235 N/mm²) are estimated as p₁, p₂, p₃, p₅, p₆, p₄ = p₇ = p₈ = 0. Write the mathematical expression (inequality) involving p₁... p₈.
Answer
A. p₁ + p₂ + p₃ + p₅ + p₆ < 10⁻⁸
59
An offshore supply vessel has very low freeboard in its working deck and a buoyant superstructure at the forward. The working deck gets immersed in water for low heel angles. The GZ curve is computed with "free to sink and trim" and "fixed trim" condition. Which one of the GZ curve you will use for the designing the vessel?
Answer
D. GZ curve computed with "free to sink and trim"
60
As per gas carrier ship regulation, the empty independent tanks must be designed to endure antifloating arrangement. Antifloating arrangement means:
Answer
A. Buoyant force on independent tank > Weight of independent tank
61
As per MARPOL Crude Oil washing system needs to be provided for the following ship type:
Answer
A. Oil tanker
62
As per MARPOL, for bottom damage, independent calculations for mean outflow shall be done for 0 m and -2.5 m tide conditions. They are combined as follows: O_(MB) = 0.7 O_(MB(0)) + 0.3 O_(MB(2.5)). Where: O_(MB(0)) = mean outflow for 0 m tide condition; and O_(MB(2.5)) = mean outflow for -2.5 m tide condition, in m³. Oil outflow will be more for 0 m or -2.5 m condition?
Answer
B. -2.5 m
63
A double hull bulk carrier has 7 cargo holds. The vessel's beam is 42.0 m. The width of each side wing tank is 2.5 m. There is no centerline bulkhead in the cargo hold. The probability of side damage occurring between the transverse bulkheads bounding no. 2 space is 0.1266. The following will hold true:
Answer
Question Cancelled
64
The steering gear can turn a rudder from -35° to +30° in 28 seconds. During Zigzag test (20°/20°) the time taken for moving rudder from -20° to +20° will be ____________ secs.
Answer
A. 17.23
65
During a 20°/20° Zigzag test, the ship's initial heading angle was 150°. The first -20° rudder angle command would be executed when the ship's heading angle was _____________.
Answer
A. 170°
66
During a -10° / -10° Zigzag test, the ship's initial heading angle was 135°. The first +10° rudder angle command would have been given when the ship's heading angle was ______________.
Answer
D. 125°
67
For Q. 47 & 48. A ship's L_(bp) = 350.0 m. As per IMO regulations, during a turning circle test, the tactical diameter ≤ 5.0 × L_(bp) and advance ≤ 4.5 × L_(bp). Q.47: During a port turning circle test, the ship's initial heading angle was 180°. The maximum permissible transverse displacement of the ship (from its initial position) when its heading angle first becomes _____________ (degrees) will be _____________ (meters).
Answer
A. 0°, 1750
68
During a starboard turning circle test, the ship's initial heading angle was 90°. The maximum permissible longitudinal displacement of the ship (from its initial position) when its heading angle first becomes ______________ (degrees) will be ______________ (meters).
Answer
D. 180°, 1575
69
During a starboard turning circle test, the ship's initial heading angle was 270°. The transverse displacement of the ship (from its initial position) when its heading angle first becomes ______________ (degrees) is called ______________.
Answer
A. 0°, Transfer
70
Inside a LNG cargo ship tank due to heat ingress the cargo density variation is present. This induces a convective flow in Z direction. In which of the following motions Coriolis acceleration will act on the fluid: roll, pitch and yaw.
Answer
A. Roll and Pitch
71
A fighter jet is speeding on the flight deck of an aircraft carrier (in X axis direction of the ship) at a constant speed of 150 km/hour. The ship is steadily yawing to port side at 5°/sec. the magnitude of Coriolis acceleration acting on the fighter jet. Please ignore all other dynamical effects.
Answer
A. 7.272 m/s²
72
Time derivative of unit vector in rotating coordinate system will be _______________.
Answer
D. All of the above
73
The Euler angles used in ship dynamics are orthogonal.
Answer
B. No
74
During a sway harmonic test, 3 complete oscillation cycles are required. The carriage is towed at a steady forward speed of 4.0 m/s. The time period of one complete sway oscillation is 10 sec. The minimum tank length required will be _________________ m.
Answer
B. 120
75
In the 6 DoF motion of the ship, which degrees of freedom have the stiffness or restoring term present?
Answer
D. (1), (2) and (3)
76
The following procedure will be followed during crash stop maneuver execution in a ship fitted with (i) fixed pitch propeller (ii) controllable pitch propeller.
Answer
A. (i) Stop and reverse main engine (ii) Only reverse the propeller pitch
77
The following parameters are measured during crash stop maneuver execution in a ship
Answer
D. All of the above
78
The instrument used for measuring heading angle and which does not depend on Earth's magnetic field is called _______________.
Answer
A. Gyrocompass
79
The yaw motion equation for 6 DoF motion is expressed as follows. The terms I_(zx), I_(zy), I_(xy) are part of: I_(zz) ṙ +I_(zx) (ṗ-rq) + I_(zy) (q̇ + rp) +I_(xy) (p²-q²) + (I_(yy) - Iₓₓ) pq+ mx_G (v̇+ur-wp) = N
Answer
D. (1) and (2)
80
The 3 DoF motion equation of surface ship is given below: m [u̇-vr-x_(G) r²] = -A₁₁ u̇ +Xᵤᵤ u² +a₃ v² +a₇ r² +a₉ vr+X_P+X_R m [v̇ +ur-x_G ṙ] = -A₂₂ v̇ - A₂₆ ṙ - A₁₁ur+b_1v+b_3r+b₁₃v²r+b₁₅ vr² + b₂₆ v³ +b₂₈r³ +Y_P+Y_R I_(zz) ṙ = -A₆₂ v̇ - A₆₆ ṙ - (A₂₂ - A₁₁) uv - A₂₆ ur + f₁ v + f₃ r + f₁₃ v² r +f₁₅ vr² + f₂₆ v³ + f₂₈ r³ + N_P + N_R It is a ___________ differential equation.
Answer
C. Coupled and non linear
81
The sway + yaw coupled oscillation motion equation and PD autopilot equation at steady forward speed for a ship is given below. When expressed in the state space form Adotx=Bx+Cz, the size of A matrix will be: [[(m'-Y'_(v̇)), Y],[-(N'_(v̇)-m'x'_(CG)), (I'_Z-N'_(ṙ))]] ((v̇'),(ṙ')) = [[(Y'_v), Y'],[(N'_v),m']]((v'),(r')) + ((Y'_(delta) delta_R),(N'_(delta) delta_R)) T'_E δ̇' = K'_P (psi_d - psi) - T'_D(r') - delta_R
Answer
A. 4 × 4
82
Explain why a conventional merchant ship heels when the rudder angle is given. Does the direction of heel angle change as the ship's sway + yaw dynamics build up?
Answer
A. Roll moment is induced because rudder is offset from ship's vertical centre of gravity. Yes
83
For a moving ship rudder is more effective at the _____________ of a ship.
Answer
C. Aft
84
During a sway harmonic test, the hydrodynamic sway force and the ship speed are measured. Assume sway force and sway motion as Y_H = Y_(v̇) × v̇ + Y_v × v + Yᵥᵥᵥ × (v)³ and y (in meters) = A × sin ((2π)/(T) t) respectively. The carriage moves ahead at uniform speed u during the test. To determine Y_(v̇), Y_v and Yᵥᵥᵥ following analysis is required:
Answer
D. Fourier analysis
85
The sway + yaw coupled oscillation at steady forward speed is given below. [[(m'-Y'_(v̇)),m'],[-(N'_(v̇)-m'x'_(CG)),(I'_Z-N'_(ṙ))]] ((v̇'),(ṙ')) +[[(-Y'_v),-Y],[-(N'_v),-(N'_r-m'x'_(CG))]] ((v'),(r')) = ((Y'_(delta) delta_R),(N'_(delta) delta_R))
Answer
D. (1) and (3)
86
For the ship rolling motion equation: (I'_(xx)+A'_(44)) φ̈' + b'_(44) φ̇' + C'_(44)phi = 0
Answer
D. (1), (2) and (3)
87
To transform the body fixed dynamics of a surface ship `u, v` and `r` (surge speed, sway speed and yawing rate) to the NED (North East Down) coordinate system the following parameter is required.
Answer
C. Heading angle
88
Determine the inertia tensor (matrix) about the coordinate centre for a unit which consists of two small particles, each of mass m, connected by the light but rigid slender rods. Each one of the particle is attached at the forward and aft end of the rod at a distance of (l, 0, 0) m and (-l, 0, 0) m from the coordinate centre.
Answer
A. ([0,0,0],[0,2ml²,0],[0,0,2ml²])
89
Determine the center of the circle and its radius given by the equation: x² + y² - 4 x +6 y - 3 = 0
Answer
A. Centre (2, -3), Radius: 4
90
A pulley driving a belt has a diameter of 300 mm and is turning at 2700/π revolutions per minute. Find the angular velocity of the pulley and the linear velocity of the belt assuming that no slip occurs.
Answer
B. ω = 90 rad/sec, v = 13.5 m/sec
91
A towing carriage is travelling at 4.0 m/s and has wheels of diameter 1000 mm. Assume no slipping of wheel occurs. Determine the angular velocity of the wheels.
Answer
A. 76.4 rpm
92
During propeller open water test, it is necessary to measure the following:
Answer
D. (2) and (3)
93
A 5 bladed overlapping propeller is kept on a table with its face pointing up. Its outline is then drawn on the table. The resulting shape will be the _____________ of the blade.
Answer
D. None of the above
94
Consider a straight line in XY plane parallel to X axis. Take three coordinates in this line i.e. {(-6.0, 1.0, 0.0), (0.0, 1.0, 0.0), (6.0, 1.0, 0.0)} in meters. Consider that this line is the chord of a controllable pitch propeller blade section at radius 7.5 m at 0° pitch angle. Wrap this chord along a cylinder of radius 7.5 m. The centre of cylinder is: (0, 1, -7.5). The coordinates of the point (0, 1.0, 0.0) do not change. The coordinates of the other two points will be:
Answer
A. X: 5.3802, Y: 1.0, Z: -2.2747; X: -5.3802, Y: 1.0, Z: -2.2747
95
The stability of a rectangular barge will _____________ after its double bottom is damaged. The double bottom height is much lower than the intact water line and waterplane remains intact after the double bottom damage.
Answer
A. Increase
96
The propeller open water efficiency (η_O) is defined as follows:
Answer
B. (K_(TO) × J)/(2 π K_(QO))
97
Following parameter can be varied for a controllable pitch propeller:
Answer
A. Propeller pitch
98
Following parameter can be varied in a fixed pitch propeller:
Answer
D. None of the above
99
For computing propeller mass and the mass moment of inertia about the rotation axis, following parameters are essential:
Answer
A. Section area of the propeller blade
100
The following is one of the design criteria for preventing forward bottom slamming:
Answer
D. Minimum draft
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