| Post Name | Technical Supervisor - Travancor Sugars and Chemicals Ltd |
|---|---|
| Question Paper Code | 130/2024/OL |
| Category Code | 693/2023 |
| Date of Test | 10 December 2024 |
| Exam Type | Online Examination |
| Total Questions | 100 |
1
The center of pressure on a submerged surface is located ________ the centroid of the surface.
Answer
B. Below
2
What is the point in a submerged object where the buoyant force acts?
Answer
A. Center of buoyancy
3
Which of the following is the correct form of Bernoulli's equation for incompressible fluid flow?
Answer
C. P+(1/2)ĻvĀ²+Ļgh=constant
4
Assertion (A) : Bernoulli's equation is derived from the conservation of energy principle. Reason (R) : Bernoulli's equation assumes that the ļ¬uid ļ¬ow is compressible and viscous.
Answer
C. (A) is true, but (R) is false
5
Assertion (A) : The metacentric height is an indicator of a ship's stability. Reason (R) : A ļ¬oating body is said to be in stable equilibrium when its metacentric height is positive.
Answer
A. Both (A) and (R) are true, and (R) is the correct explanation of (A)
6
Pelton turbines are classiļ¬ed as __________ turbines.
Answer
A. Impulse
7
What is the term for the phenomenon where vapor bubbles form and collapse in a hydraulic turbine?
Answer
C. Cavitation
8
Which of the following hydraulic turbines is best suited for low head and high discharge applications?
Answer
B. Kaplan turbine
9
Assertion (A) : A draft tube is used in a hydraulic turbine to recover the kinetic energy of the ļ¬uid. Reason (R) : The draft tube increases the velocity of water exiting the turbine.
Answer
C. (A) is true, but (R) is false
10
Assertion (A) : Speciļ¬c speed of a turbine helps in the selection of the most suitable type of turbine for a given head and discharge. Reason (R) : Higher speciļ¬c speed turbines are suitable for low heads and high discharge conditions.
Answer
A. Both (A) and (R) are true, and (R) is the correct explanation of (A)
11
Universe is an example for
Answer
C. Isolated System
12
Extensive properties of system depend on
Answer
A. Mass of the system
13
The ratio Cp/Cv is _________.
Answer
C. More than one
14
Which thermodynamic law among the following is known as the law of degradation of energy?
Answer
C. Second law
15
Which among the following is known as constant volume cycle?
Answer
B. Otto cycle
16
Which among the following is considered as an unwanted element of the fuel as it can destroy the metal parts of boilers?
Answer
A. Sulphur
17
Caloriļ¬c value of Gaseous fuel can be determined by:
Answer
C. Junker's calorimeter
18
The speciļ¬c volume of water when heated from 0Ā°C
Answer
B. First decreases and then increases
19
The work done by the turbine in a Rankine cycle is equal to
Answer
B. Chang of enthalpy between inlet and outlet
20
Which among the following is a simple impulse turbine?
Answer
A. De Laval Turbine
21
The ratio of modulus of rigidity to the modulus of elasticity for a Poisson's ratio of 0.25 would be
Answer
A. 0.4
22
A worker has cut a triangle sheet of base 100 mm and height 120 mm. The Moment of Inertia (mmā“) about an axis passing through the base of the triangle is
Answer
B. 144Ć10āµ
23
The volumetric strain of a cylindrical rod is
Answer
D. Linear strain - twice the strain of diameter
24
A simply supported beam of span (l) carries a uniformly distributed load over the whole span. The shear force diagram will be:
Answer
C. Two equal and opposite triangles
25
The ratio of crippling load for column of length (l) with both ends ļ¬xed to the crippling load of the same column with one end ļ¬xed and the other end free is
Answer
A. 16
26
The steel used to make rails under heavy traļ¬c and on sharp curves is
Answer
C. Manganese steel
27
The % of Chromium in the stainless steel used to make cutlery is in the range of
Answer
B. 10% to 20%
28
A steel specimen is heated to a temperature of 780Ā°C and cooled at a slowest possible rate in the furnace itself. The property which the steel piece obtains is
Answer
D. Toughness
29
The upper critical temperature for steel
Answer
B. Varies according to the carbon content
30
18/8 steel contains
Answer
C. 18 percent chromium and 8 percent nickel
31
In resistance welding, a current of ________ voltage and ________ ampere is passed between the electrodes.
Answer
C. Low, High
32
Which part of the lathe has a long shaft with the keyway extending from the feed box across and in front of the bed?
Answer
A. Feed rod
33
Which of the following mechanism is used in shaper machine?
Answer
B. Quick return mechanism
34
Which of the following is a characteristic of the climb milling operation?
Answer
D. Forces are less
35
Shrinkage allowance is also called
Answer
C. Contraction allowance
36
The transverse ļ¬llet welded joints are designed for
Answer
A. Tensile strength
37
The power transmitted by means of a belt depends upon
Answer
D. All of the above
38
The relation between the pitch of the chain (p) and pitch circle diameter of the sprocket (D) is given by
Answer
C. p = D sin (180Ā°/T)
39
The internal angle of a regular pentagon is
Answer
B. 108Ā°
40
Which of the following statement is/are correct? (i) Object is kept in the third quadrant under the ļ¬rst angle projection. (ii) In the ļ¬rst angle projection, the object lies between the observer and the plane of projection.
Answer
B. Only (ii) is correct
41
Which type of boiler is generally used in high pressure applications?
Answer
A. Water tube boiler
42
What would be the likely eļ¬ect of using a fuel with a low cetane number in diesel engine?
Answer
C. Increase in ignition delay
43
What is one major advantage of Lamont Boiler?
Answer
B. High Pressure Steam Generation
44
Thermal eļ¬ciency of a typical diesel engine is in the range of
Answer
C. 30 to 40%
45
Which part of the Babcock and Wilcox boiler collects impurities from the water?
Answer
D. Mud box
46
Which mode of heat transfer requires a medium to transfer heat?
Answer
D. Conduction and Convection
47
According to newton's law of cooling as the reciprocal of temperature diļ¬erence between an object and its surrounding ļ¬uid decreases, the rate of cooling
Answer
A. Increases
48
Which device is used to transfer heat to the inside of a room during winter?
Answer
B. Heat Pump
49
Which of the following is a common drawback of using as refrigerant?
Answer
D. High Toxicity
50
Psychrometry is the study of thermodynamic properties of __________.
Answer
C. Moist air
51
A capacitor with a capacitance of 4Ī¼F is charged using a steady current of 3Ī¼A for a duration of 8 seconds. Calculate the voltage that will appear across the capacitor at the end of this charging period.
Answer
B. 6 V
52
A parallel plate capacitor is charged to Q, with a plate separation of d. When d is increased, which of the following statements are correct? (i) Q decreases (ii) Capacitance decreases (iii) Voltage decreases (iv) Voltage increases
Answer
B. (ii) and (iv) are correct
53
In a uniform electric ļ¬eld: (i) The ļ¬eld lines are always perpendicular to the equipotential surfaces. (ii) Moving a charge along an equipotential surface requires no work. (iii) Moving a charge between two diļ¬erent equipotential surfaces requires no work. Which of the above statement is correct?
Answer
C. Statements (i) and (ii) only
54
A solid conducting sphere with radius R carries a total charge Q. What is the magnitude of the electric field intensity E at a distance r (where 0 < r < R) inside the sphere?
Answer
D. Zero
55
A coil with 6 Ī© resistance and 0.3H inductance is connected to a 12V DC voltage source. Under steady state condition, calculate the energy stored in the magnetic ļ¬eld of the coil.
Answer
A. 0.6 J
56
Two resistors, 25 Ī© and 50 Ī©, are connected in parallel. If the current through the 25 Ī© resistor is 4A, what is the current through the 50 Ī© resistor?
Answer
B. 2A
57
In a network containing linear resistors and an ideal voltage source, what happens to the voltage across each resistor if all resistor values are doubled?
Answer
D. It remains the same.
58
Three resistors, each of RĪ©, are connected in a triangular (delta) conļ¬guration. What is the equivalent resistance between any two terminals?
Answer
D. RĪ©
59
Two incandescent light bulbs rated at 40 W and 60 W are connected in series to a mains power supply. Which of the following statements is correct?
Answer
D. The 40 W bulb is brighter than the 60 W bulb.
60
Assertion (A) : Kirchhoļ¬'s current law states that the algebraic sum of the currents entering any node is zero. Reason (R) : This law is based on the principle of conservation of charge. Which of the following statements is correct?
Answer
A. Both (A) and (R) are true, and (R) is the correct explanation of (A)
61
If the maximum value of AC input voltage is 200V, the R.M.S. value of output voltage of Half wave rectifier is
Answer
B. 100 V
62
If the average value of a waveform is 30 V and R.M.S. value is 50 V, the form factor is
Answer
A. 1.67
63
A pure sinusoidal voltage is applied across a pure resistor. If the maximum value of voltage is 100V and maximum value of current is 50V the average power developed in the resistor is
Answer
B. 2500 W
64
Three coils of equal impedance are connected in star. If each coil has resistance of 4Ī© and inductive reactance of 3Ī©, the current through any branch if Line voltage of 200V is applied to the star connected coil is
Answer
C. 40/ā3 A
65
If a single-phase AC voltage of 240V, 50Hz is applied across a pure capacitor of 2Ī¼F, the current through the capacitor is
Answer
D. 960 Ī¼A
66
High value of Torque to weight ratio in an analog type indicating instrument shows
Answer
B. Low value of friction loss
67
An ammeter which can measure upto 2 mA has an internal resistance of 200 Ī© which is to be converted to measure 2A. The value of shunt resistance connected is
Answer
A. 0.2002
68
If the Lissajous pattern has the shape of an ellipse and if the major axis of ellipse lies in the ļ¬rst and third quadrants, the phase angle is between
Answer
A. 0Ā° to 90Ā°
69
Stray-conductance eļ¬ect in AC bridges is due to
Answer
C. Imperfect insulation
70
A megger is usually used to measure
Answer
C. High value resistance, particularly insulation resistance
71
Determine the number of batteries required to develop a battery system of voltage 24 V and energy 10.8 kWh. Each battery is of voltage 12 V and 150 Ah capacity.
Answer
B. 6
72
Choose the correct option regarding the following statements: Assertion (A) : Contacts of lead acid batteries should be cleaned regularly every month. Reason (R) : When a battery is fully charged, its speciļ¬c gravity rises to its maximum value.
Answer
B. Both (A) and (R) are true but (R) is not the correct explanation of (A)
73
At maximum power point under standard test conditions, a solar cell generates a voltage 0.9 times of its open circuit voltage. Calculate the current at maximum power point if the ļ¬ll factor of given cell is 75%
Answer
A. 0.83 times of short circuit current
74
Among the following statements, identify those safety practices to be adopted in the event of ļ¬re due to electric origin: (i) Throw plenty of water over ļ¬re aļ¬ected areas. (ii) Use class C type ļ¬re extinguishers over ļ¬re aļ¬ected areas. (iii) Disconnect electric supply immediately to the aļ¬ected area.
Answer
B. (ii) and (iii) only
75
Among the following, select those statements which aļ¬ect the severity of electric shock on human body (i) Duration of current ļ¬ow. (ii) Magnitude of current through human body (iii) Path of current ļ¬ow through human body
Answer
D. (i), (ii) and (iii)
76
Lamps of rating 230 V, 100 W are used for illuminating a 30 m Ć 12 m room. Determine minimum number of lamps required to achieve illumination of 100 lux if lamp eļ¬cacy is 36 Lumens/watt. Coeļ¬cient of utilization is 0.6 and Depreciation Factor is 1.2
Answer
A. 20
77
Select the correct order of installing protective devices in a single- phase consumer electrical wiring, after the installation of energy meter.
Answer
D. Energy meter Double Pole Isolator RCCB MCB
78
In pipe earthing, depth at which pipe should be buried depends on
Answer
B. Ground Moisture
79
When compared to single stranded wires, which of the following statement is/are correct about multi stranded wires used for electrical wiring? (i) More ļ¬exible (ii) Less chance of corrosion (iii) Require Simple manufacturing process (iv) More heat dissipation
Answer
D. (i) and (iv)
80
The purpose of ļ¬lling powder used within a High Rupturing Capacity Cartridge fuse is to act as a
Answer
D. Arc quenching medium
81
The current drawn by a 230V d.c. motor having armature resistance of 0.5 ohm and back emf of 200V will be
Answer
B. 60A
82
The voltmeter connected across a generator reads voltage same at no load and rated load. Then the generator is the type of
Answer
A. Flat compound generator
83
While running at light load the ļ¬eld circuit of DC shunt motor gets opened. Then the motor will
Answer
C. Pick up high speed
84
The motor having characteristics of increase in speed with increase in load torque
Answer
D. Diļ¬erential compound motor
85
A transformer to be tested at full load conditions but consuming only losses from the mains, then the test should be
Answer
C. Back-to-back test
86
The armature reaction eļ¬ect in a synchronous machine depends on
Answer
D. Both (2) and (3)
87
For satisfying performance of a 300V, 60 Hz induction motor, the supply voltage of 50 Hz should be equal to
Answer
A. 250 V
88
A 8 pole, 50 Hz single phase induction motor running at 700 rpm. Its slip will be
Answer
B. 0.066
89
For which type of transformer, the secondary winding should not be left open in any circumstances?
Answer
C. Current transformer
90
A synchronous motor is operating at no load with unity power factor. If the ļ¬eld excitation current is increased, then
Answer
B. Power factor will be leading and current will increase
91
The semiconductor Germanium is not used for the fabrication of thyristors because of (i) Ge has low thermal conductivity. (ii) Ge has high thermal resistance. (iii) Ge has low break down voltage. (iv) Ge has high coast.
Answer
D. All the above
92
The angle measured from the instant that gives the largest average output voltage to the triggering instant of a SCR is called _________.
Answer
B. Firing angle
93
Which of the following statement is/are correct regarding SCR? (i) If the anode voltage is less than forward break over voltage a forward leakage current ļ¬ows through the SCR. (ii) When anode voltage of a forward biased SCR is greater than forward break over voltage it switches from reverse blocking mode to forward blocking mode. (iii) A forward biased SCR switches from forward conducting state to forward blocking state if the anode reduced below holding current.
Answer
C. Only (i) and (iii)
94
The unijunction transistor is used as a relaxation oscillator because it exhibits
Answer
C. Negative Resistance characteristics
95
Mc Murray inverter is a __________.
Answer
A. Current commutated VSI
96
Which of the following logic gate performs logical multiplication?
Answer
A. AND
97
The 2's Complement of 10111001 is _________.
Answer
C. 01000111
98
How many JK ļ¬ip.ļ¬ops are required to build a Mode 6 synchronous counter?
Answer
B. 3
99
How many clock pulses are required to enter an 8 bit data in a serial shift register?
Answer
D. 8
100
Which of the following is not involved in analog to digital conversion?
Answer
A. Modulation
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