7 January 2016

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TECHNICIAN(Refrigeration Mechanic),MILMA SOLVED PAPER 2015

TECHNICIAN(Refrigeration Mechanic),MILMA
EXAM DATE:24-11-2015

1.The chemical formula of water is:
A.N2 
B.O2
C.H2O
D.CO2



2.Environment friendly refrigerant R134a is used in new generation domestic refrigerators.Its chemical formula is:
A.CHCIF2
B.C2CI3F3 
C.C2CI2F4
D.C2H2F4
3.Actually the compressor has two jobs.One is compressing the refrigerant vapours and the other is:
A.Equalise pressure in the system
B.Circulate the refrigerant in the system
C.Provide refrigerating effect
D.Keep the foods fresh
4.Refrigerator door is pulled close by:
A.Magnetic gasket
B.Gravitational force
C.Spring tension
D.Stanting level
5.The five micron filters is named as:
A.Catch all filter
B.Rough filter
C.Bag filter
D.Fine filter
6.The component which release the heat from the refrigerant is:
A.Condenser
B.Evaporator
C.Expansion device
D.Thermostat
7.C.A.V.stands for
A.Central Air Volume
B.Constant Air Volume
C.Creative Air Volume
D.Constant Air Velocity
8.R.717 stands for:
A.Ammonia
B.Freon
C.Sulphur Di oxide
D.Sodium Chloride
9.Zeotropic mixtures are coming under------------series number.
A.500
B.400
C.300
D.600
10.The clearance between  cylinder wall and piston wall is kept:
A..0003”
B..003”
C..0001”
D..001”
11.Cast iron is produced from which furnace:
A.Blast furnace
B.Cupola furnace
C.Pudding furnace
D.Electronic are furnace
12.The unit of resistance is:
A.Ampere
B.Ohm
C.Volt
D.Watt
13.Efficiency is always:
A.More than one
B.Equal to one
C.Less than one
D.None of the above
14.The reason for poor condensation is:
A.No lubrication
B.Poor brazing
C.Capillary check
D.Fins blocked
15.Ideal pressure of F12 is:
A.2kg/cm2
B.3.5kg/cm2 
C.6kg/cm2
D.7.5kg/cm2
16.The metal wire which give good earth contact is:
A.Copper
B.Glass
C.Brass
D.Aluminium
17.Gasket prevents:
A.High temperature
B.Low pressure
C.Water flow
D.Leaks in joints
18.The evaporator which is more efficient is:
A.Dry evaporator
B.Flooded evaporator
C.Evaporator condenser
D.Heat exchanger
19.Thermostat element is charged with:
A.F12
B.Alcohol
C.Volatile liquid
D.Alcohol with water
20.The electrical fire spreading can be protected by:
A.Earth connection
B.Bucket of water
C.Sand
D.Fire extinguisher
21.An air sample without water vapour is called:
A.Moist air
B.Dry air
C.Saturated air
D.Cooled air
22.A thermostat controls:
A.The voltage
B.The air flow
C.The Pressure in the system
D.The temperature in the system
23.The valve seating should be checked for leak by:
A.Water
B.Kerosene
C.Air
D.Spirit
24.The size of the gasket is based on:
A.Length
B.Width
C.Thickness
D.roughness
25.1 Joule=-------------------
A.107 ergs
B.109 ergs
C.1010 ergs
D.105 ergs
26.The maximum amount of vapours having no unvapourised liquid is:
A.Super Heated vapours
B.Saturated vapours
C.Unsaturated vapours
D.Perfected gas
27.The given formula v=(pie xD2xSNR)/4
Cubic inch/min is used for finding:
A.Volumetric efficiency
B.Piston Displacement
C.R.P.M
D.Range of cooling tower
28.The refrigerant used for ice plant is:
A.F12
B.F22
C.F12
D.Waters
29.Which device protect our circuits from over flowing current?
A.Switch
B.Wire
C.Clamp
D.Fuse
30.Relay is an-----------Operated switch
A.Pressure
B.Electrical
C.Temperature
D.Airflow
31.Cold air moves in the direction of:
A.Upward
B.Downward
C.Horizontal
D.All of the above
32.Brine Solution density is checked by:
A.Tacometer
B.Hydrometer
C.Anemometer
D.Thermometer
33.If the Solenoid valve has mechanical problem:
A.Service the plunger
B.Exchange the coil
C.Replace the top cover
D.Change the electrical connection
34.The Piston is made of:
A.Mild steel
B.Brass
C.Copper
D.Cast iron
35.Evaporative condensers cooling medium is:
A.Combination of air and water
B.Refrigeratant vapour
C.Natural Air
D.Chilled water
36.The effect of cooling produced by a good installed unit will be:
A.Maximum
B.Minimum
C.Intermittent
D.Poor
37.In a refrigeration system frosting starts from capillary due to:
A.Oil in evaporator coil
B.Compressor has poor blocked
C.Gas quantity is less
D.Drier filter partially blocked
38.Starting capacitor is employed to increase:
A.Life of winding
B.Motor torque and power factor
C.Running performance
D.Life of motor
39.HFC should not vent to atmosphere because:
A.It is flammable in atmospheric temperature
B.It has high G.W.P
C.It is highly toxic
D.It is very costly
40.The valve lifting capacity control lifts the:
A.Solenoid valve
B.Service valve
C.Suction valve
D.Piston
41.At which point the 0C scale and 0F scale will be same
A.400 
B.600
C.-400
D.00
42.The chemical formula of R12 is:
A.CCI2F2
B.C2CI2F2
C.C2CIF2 
D.C2CI2F
43.Which one of the following is the cause of high head pressure?
A.Air is the system
B.Oil is the evaporator
C.Shortage of refrigerant
D.Moisture is the system
44.Which one of the following is not a refrigerant control device?
A.Thermostatic expansion valve
B.Capillary tube
C.Thermostat switch
D.Low slide float value
45.In a reciprocating compressor suction and discharge reeds are made of:
A.Carbon steel
B.Stainless steel
C.Cast iron
D.Spring steel
46.Name the type of compressor used in domestic refrigerator:
A.Screw compressor
B.Sealed type scroll
C.Sealed type rotary
D.Sealed type reciprocating
47.Liquid refrigerant collects in the lower coil of the condenser and flows through:
A.Evaporator coil
B.Compressor suction
C.Heat exchanger
D.Capillary tube
48.Water inlet flow of the water cooler is controlled by:
A.Expansion valve
B.Solenoid valve
C.Float valve
D.Pressure regulating valve
49.Thermostatic expansion valve function with:
A.Suction pressure
B.Discharge pressure
C.Suction temperature
D.Discharge temperature
50.Excessive frost collection inside the deep freezer is:
A.Lower freezer temperature
B.Spoil the food content
C.Acts as an insulation
D.Gives maximum cooling
51.Reason for Thermostat not cutout is:
A.Thermostat contacts welded
B.Low voltage
C.Storage tank is empty
D.Float valve stuck in close position
52.An object with a difference of potential exists between it and earth is called:
A.Live
B.Dead
C.Earth electrode
D.Resistance Area
53.The reason for thermostat become defective is:
A.Moisture in the system
B.Lack of lubrication oil
C.Carbon formation in contact points
D.OLP is not responding
54.In Freon group condenser tubes are:
A.Aluminium
B.Brass
C.Steel
D.Copper
55.The cooling capacity of 1 ton of refrigeration is:
A.5,000 BTU/hr
B.12,000 BTU/hr
C.18,000 BTU/hr
D.2,44,000 BTU/hr
56.The instrument used for finding the leakage of Freon and Methyl chloride is:
A.Thermostat
B.Halide torch
C.Psychrometer
D.Hydrometer
57.In the following which one is not a part of an oil pressure safety control?
A.Bimetal strip
B.Contact points
C.Reset button
D.Feeler bulb
58.In a Fin & Tube type Air cooled condenser Fins are provided for:
A.Protect the tube from damage
B.Strengthen the tube
C.Increasing the heat transaction rate
D.Giving a good shape
59.Expansion valve is located:
A.Before the evaporator
B.Before the drier
C.After the evaporator
D.Before the condenser
60.What is the expansion of LED?
A.Light emitting device
B.Light emitting diode
C.Light ejecting device
D.All of the above
61.Capillary tube is used  in conventional refrigerator as a:
A.Expansion device
B.Control device
C.Metering device
D.All of the above
62.CSIR wiring will not have any one of the following ?
A.Start capacitor
B.Run capacitor
C.Relay
D.Relay Package Assembly
63.Which of the following refrigerant is highly toxic and flammable?
A.Ammonia
B.Carbondioxide
C.Sulphurdioxide
D.R-12
64.For safety which wire is connected to the ON/OFF switch:
A.Dummy
B.Neutral
C.Phase
D.Earth
65.High discharge temperature is due to:
A.Capacitor defective
B.Starting relay defective
C.Fan motor defective
D.Compressor defective
66.Dry ice is:
A.Ammonia
B.H2O
C.Carbon Mono oxide
D.CO2
67.Which type condensers are commonly used in water coolers?
A.Natural Draft
B.Forced Draft
C.Water cooled
D.Coolant Circulation
68.The weight of HC charged to the system for drop in conversion from CFC 12 to HC is:
A.140%
B.100%
C.40%
D.60%
69.The ball bearings of electrical motor are lubricated by:
A.Grease
B.Air
C.Oil
D.Water
70.The component which controls the flow of refrigerant to the evaporator is called:
A.Solenoid valve
B.Thermostat
C.Expansion valve
D.Driers
71.Dehydrator is installed in the:
A.Discharge line
B.Suction line
C.Liquid line
D.Capillary line
72.The idea of Pulse tube originated from Gifford is in:
A.1968
B.1947
C.1961
D.1930
73.EASHRAE is:
A.American Society of Heating Refrigerating and Air Conditioning Engineers
B.Association of States of Heating Refrigerating and Air Conditioning Engineers
C.American Society having Refrigerating  and Air Conditioning Engineers
D.American Society of Harmful Refrigeration and Air Conditioning in Earth
74.Refrigeration is the process of --------------heat
A.Removing
B.Adding
C.Lowering
D.Transfering
75.Auto defrost operated by:
A.Evaporator fan
B.Thermostat
C.Timer switch
D.Heating element
76.Rectifiers are used to convert:
A.Voltage of current
B.Voltage of velocity
C.AC to DC
D.DC to AC
77.Normal drinking water temperature is:
A.100C
B.150C
C.200C
D.250C
78.Brine solution is:
A.Maintains the temperature
B.Made of Diesel
C.Highly flammable
D.Secondary refrigerant
79.If the fan blades are cracked:
A.Straighten the blade
B.Change the blade
C.Braze the cracking of blade
D.Stick the cracked space with adhesive
80.Poor compression due to:
A.Gas storage
B.Reeds Leak
C.Poor condensation
D.Compressors
81.The Hirakud Dam is built across the river:
A.Mahanadi
B.Ganga
C.Godawari
D.Kaveri
82.V.T.Bhattathiripad was the author of:
A.Agnisakshi
B.Kanneerum Kinavum
C.PattaBakki
D.Nalukettu
83.Poorna swaraj resolution was passed by Lahore session of Indian National congress in the year:
A.1928
B.1930
C.1929
D.1942
84.The famous news paper owned by Vakkom Abdul Khader Moulavi:
A.Young India
B.Meerathul Akbar
C.Mithavadi
D.Swadesabhimani
85.The Kerala Government’s campaign’Subodham’is an:
A.Anti drug awareness programme
B.Anti corruption awareness programme
C.Aids awareness programme
D.Anti smuggling awareness programme
86.Who was called the political father of the Ezhavas?
A.Sree Narayana Guru
B.Kumaranasan
C.Dr.Padmanabhan Palpu
D.Ayyankali
87.The historic monument built to commemorate the soldiers who died in first world war:
A.Qutub Minar
B.Charminar
C.Gate way of India
D.India Gate
88.Dada Saheb Phalke award winner for the year 2014:
A.Sasi Kapoor
B.Sanchari Vijay
C.Anil Kapoor
D.A.R.Rahman
89.’Athmavidyasangam’was founded by:
A.Vagbhatananda Swamikal
B.Thycaud Ayya
C.Chattambi Swami
D.Pandit Karuppan
90.Who became the speaker of Kerala Assembly after the death of G.Karthikeyan?
A.Sabareenath
B.N.Sakthan
C.Thomas Unniyadan
D.P.C.Thomas
91.Joseph Sepblatter,President of FIFA who resigned recently belonged to:
A.France
B.Switzerland
C.England
D.Germany
92.’Swaraj is my birth right and I shall have it’.Who said this?
A.Gandhiji
B.Nehru
C.Bal Gangadhar Tilak
D.Subhash Chandra Bose
93.Amarthyasen received Nobel Prize for:
A.Peace
B.Economics
C.Physics
D.Literature
94.Which one of the following is not an east flowing river in Kerala?
A.Kabani
B.Bhavani
C.Pambar
D.Pamba
95.Mission Indradhanus is a programme:
A.To immunize children against  seven disease
B.To educate all children
C.To eradicate poverty
D.To combat terrorism
96.Chennara,the birth place of Mahakavi Vallathol is in:
A.Thrissur District
B.Malappuram District
C.Palakkad District
D.Kollam District
97.Gandhiji’s first Sathyagraha in India was at:
A.Sabarmathi
B.Surat
C.Bardoli
D.Champaran
98.SAF games 2015 is going to be held in which of the following state?
A.Assam
B.Tamil Nadu
C.Kerala
D.Goa
99.Poykayil Yohannan was also called:
A.Chavara Achan
B.Vaikundar
C.Thycaud Ayya
D.Kumara Guru
100.Which of the following was not a member of cabinet mission in 1946:
A.Sir Stafford Crips
B.A.V.Alexander
C.Lord Mount Batten
D.Pethic Lawrance




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