| Post Name | TECHNICAL SUPERINTENDENT (ENGINEERING) - KERALA CO-OPERATIVE MILK MARKETING FEDERATION LIMITED |
|---|---|
| Question Paper Code | 012/2020 |
| Date of Test | 19 February 2020 |
| Medium of Question | ENGLISH |
| Exam Type | OMR Examination |
| Total Questions | 100 |
1
Ohmβs law is not applicable to :
Answer
A. Semiconductors
2
2J work is done in taking a charge of 20 C from one point to the other at a distance of
0.2m. The potential difference between the points is :
Answer
D. 1 ο΄ 10 ο1 V
3
The ratio of the resistances of l00W and 40W bulbs of the same rated voltage is :
Answer
A. 2:5
4
A metal plate of thickness half the plate separation is introduced between the plates
of parallel plate capacitor. The capacitance :
Answer
B. Gets doubled
5
The dissipation factor of a good dielectric is of the order of :
Answer
A. 0.0002
6
The magnetic susceptibility is negative for :
Answer
A. Diamagnetic materials only
7
A three-phase delta-connected symmetrical load consumes P watts from a balanced supply. If connected in star to the same supply, its power consumption is:
Answer
A. P/3
8
The core of an iron cored coil is replaced by air, the inductance of the coil will :
Answer
B. Decrease
9
The potential difference across the resistance, inductance and capacitance are 80V,
40V and 100V respectively in an L-
Answer
D. 0.8
10
Form factor of a half rectified sine wave is :
Answer
B. 1.57
11
The power measurement in an unbalanced 3-phase circuit can not be done by :
Answer
A. Single wattmeter method
12
An instrument capable of measuring only dc quantities :
Answer
D. None of the above
13
Kelvin double bridge is best suited for the measurement of :
Answer
C. Low resistance
14
The material used for making standard resistance is :
Answer
A. Manganin
15
Creeping in energy meter can be eliminated by :
Answer
B. Drilling diametrically opposite holes in the disc
16
The value of load factor is :
Answer
A. Less than 1
17
Transposition of overhead transmission line is done to :
Answer
B. To make the voltage drop in each line the same
18
Ferranti effect can be reduced by :
Answer
B. Adding reactors
19
Which power plant is not suited to supply peak loads?
Answer
A. Nuclear power plant
20
A conductor which connects the substation to the area where power is to be
distributed :
Answer
C. Feeder
21
The area of cross section of the neutral conductor is βββββββββ as that of any
line conductor.
Answer
Question Cancelled
22
The accurate method of load flow analysis is :
Answer
B. Newton Raphson method
23
The power system is stable if the synchronising power co-efficient is :
Answer
A. Positive
24
The surge impedance of a 60 km cable is 40 Ohms. For a 30 km line, it will be :
Answer
C. 40 Ohms
25
The inertia constant, H of a turbo generator of 200 MVA is 6. The value of H
corresponding to a base of 300 MVA will be :
Answer
A. 4
26
A 6.9 kV transmission line is connected to a transformer having 1500 turns on the
primary and 24 turns on the secondary. If the load across the secondary has an
impedance of 5 Ohms. then the secondary voltage is :
Answer
B. 110.4 V
27
A 4 pole, 250 kW, 750V dc generator has a lap winding on the armature. The current
carried by the armature coils is :
Answer
A. 83.25 A
28
A dc shunt motor is used in :
Answer
C. Lathe
29
A 4 pole dc motor with armature winding resistance of 0.5 Ohm receives a supply of
220 V. If the back emf produced during running condition is 210 V, the armature
current is :
Answer
B. 20 A
30
The nominal speed of a three phase, 12 pole induction motor is excited by a 60 Hz
source at a full load slip of 6% is :
Answer
B. 564 rpm
31
The incorporation of synchronous condenser in the power system :
Answer
C. Improves power system stability
32
If the input to the prime mover of an alternator is kept constant and the excitation is
changed, then the :
Answer
A. Reactive component of the output is changed
33
An under excited synchronous generator operates at :
Answer
B. Leading power factor
34
A synchronous generator having E = 1 pu is feeding an infinite bus with voltage,
V = 1.0 pu through a transfer reactance of 0.5, the steady state power limit is :
Answer
A. 2 pu
35
The number of turns in the starting winding of a capacitor start motor as compared
to that for split phase motor is :
Answer
B. more
36
The current gain of a common base configuration where IE = 5 mA and IC = 4.5 mA is :
Answer
C. 0.9
37
In a UJT, p-type emitter is βββββββββ doped.
Answer
B. Heavily
38
Holding current of a thyristor is :
Answer
A. Less than latching current
39
The structure of IGBT is :
Answer
C. P-N-P-N structure connected by a MOS gate
40
The controlling parameter in a MOSFET is :
Answer
C. Vgs
41
How many XOR gates are used in a 2 bit full adder circuit?
Answer
Question Cancelled
42
Which of the following circuits is used to convert multiple signals to a single output?
Answer
C. Multiplexer
43
Which of the following is an asynchronous circuit?
Answer
A. Latch
44
What is the Binary Coded Decimal conversion of decimal 147?
Answer
D. 000101000111
45
Which of these gates are called universal gates?
Answer
C. Both
46
Which of the following gates give output as 1 for different inputs?
Answer
A. XOR gate
47
If A and B are given as input to a NAND gate, what is the output?
Answer
A. A.B '
48
Convert BCD 0001 0010 0110 to binary :
Answer
B. 1111110
49
How many data select lines are required for selecting N inputs in a multiplexer?
Answer
C. logβ(N)
50
Which of the following statements accurately represents the two BEST methods of
logic circuit simplification?
Answer
D. Boolean algebra and Karnaugh mapping
012/2020 8 A
51
Waiting time in production, for manpower planning purposes should be assumed as :
Answer
A. 2-5%
52
In arc welding the voltage supplied is :
Answer
C. A.C. and D.C. both
53
Rotary indexing is required for :
Answer
D. all the above
54
For drilling holes in long strip use :
Answer
A. plate jigs
55
If a distribution is skewed to left the median will always be :
Answer
C. between the mean and mode
56
General design process of CAD does not consist of use phase :
Answer
C. implementation (maintenance)
57
The equation of motion of a laminar flow of a real fluid are known as :
Answer
C. Navier β stokes equation
58
Oil of viscosity 1.5 Pa.S and relative density 0.9 flows through a circular pipe of
diameter 5 cm with a mean velocity of 1.2 m/s. The shear stress at the wall in Pa is :
Answer
B. 288
59
For flow under a sluice gate, upstream depth is 1.2 m and depth at the vena contracta is 0.3 m. The discharge per metre width is nearly:
Answer
B. 1.25 mΒ³/s
60
Identify the incorrect statement :
A flow nozzle
Answer
D. has overall losers much smaller than in a venturimeter
61
A gas has a molecular weight of 44. The gas constant R for the gas, in ο¨J / Kg.K ο© :
Answer
A. 189
62
An air plane is cruising at a speed of 800 km/h at an altitude where the air
temperature is 0Β°C. The flight mach number at this speed is nearly :
Answer
D. 0.67
63
The unit speed N_u of a turbine of rotational speed N and head H is equal to:
Answer
B. N/βH
64
A fast centrifugal pump impeller will have :
Answer
C. backward facing blades
65
The indicator diagram of a reciprocating pump is a plot of :
Answer
D. pressure head Vs stroke length
012/2020 10 A
66
The following parameters relate to flow in a penstock :
1. Water level in the reservoir
2. Density of water
3. Elasticity of water
4. Roughness of the pipe
Pressure rise due to water hammer in a penstock depends upon
Answer
A. 1, 2,3 and 4
67
Consider the following statements :
1. Pumps is series operation allows the head to increase
2. Pumps in series operation increases the flow rate
3. Pumps in parallel operation increase the flow rate
4. Pumps in parallel operation allows the head to increase of these statements
Answer
B. 1 and 8 are correct
68
Taper usually provided on cotter is :
Answer
C. 1 in 24
69
Iron is :
Answer
A. Ferromagnetic
70
Which of the following is used for bearing liner?
Answer
D. babbit metal
71
Air is normally dehumidified by :
Answer
D. cooling
A 11 012/2020
72
The relative humidity during sensible cooling process :
Answer
A. increases
73
The capacity of compressor will be highest when its intake temperature is :
Answer
C. lowest
74
All radiations in a black body are :
Answer
B. absorbed
75
Which of the following has least value of conductivity?
Answer
A. air
76
Turbo propeller has the following additional feature over the turbo jet :
Answer
A. propeller
77
Gas turbines use following type of air compressor :
Answer
D. Axial flow type
78
In SHM the acceleration is proportional to :
Answer
B. Displacement
79
The number of dead centres in a crank driven slider crank mechanism are :
Answer
C. 2
80
Resistance to fatigue of a material is measured by :
Answer
D. Endurance limit
012/2020 12 A
81
ββββββ valve diverted-flow of milk if it does not achieve preset cut- in
pasteurization temperature in holding tube.
Answer
B. Flow diversion
82
Full form of PTFE is :
Answer
A. Poly tetra fluoro ethylene
83
Approximate diameter of manhole in a Silo is :
Answer
Question Cancelled
84
Plate and frame filter press is
Answer
D. Both
85
Sanitary pipes in which milk comes into direct contact are made up of ββββββ
material :
Answer
B. Stainless steel (SS)
86
Cr:Ni ratio of 18:8 is present in which of the following material :
Answer
B. SS-304
87
Maximum temperature at which EPDM rubber can withstand is :
Answer
Question Cancelled
88
Effectiveness of cleaning is effected by :
Answer
D. All of the above
89
Milk can be stored in milk storage tank for maximum of βββββββββ hours.
Answer
Question Cancelled
90
ββββββ can washer has higher washing capacity of 12 cans/min :
Answer
B. Straight-through can washers
91
Three processes i.e. separation, standardization and clarification when done in a
single unit is called :
Answer
A. Tri processor
92
For milk treatment, the time temperature combination used 71.5Β°C for 16 seconds is
called :
Answer
A. HTST pasteurization
93
Heating process of milk at 105-120Β°C with effective processing times of 10-30 minutes
is called :
Answer
C. Sterilization
94
For fabrication of plates of plate heat exchangers, CIP tanks, evaporator tubes which
needs higher corrosion resistance ββββββ metal is used :
Answer
C. AISI 316
95
Milk storage tank has atleast βββββ slope towards outlet for dispensing of milk :
Answer
B. 1:12.5
96
Unit operations like Crystallization, Leaching, Gravity sedimentation, Filtration are
_______________ separation processes :
Answer
B. Liquid-solid
97
The process of separation of microorganisms from milk by using centrifugal force is
called :
Answer
C. Bactofugation
98
Process of dividing fat globules into smaller ones with diameters down to οΌ 1 οm ,
depending on the operating pressure is called :
Answer
D. Homogenization
99
The storage tanks are usually over capacity than the nominal capacity of the tank by :
Answer
Question Cancelled
100
The tanks that do not need insulation are :
Answer
D. CIP tanks
ββββββββ
012/2020 14 A
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