Post: Junior Instructor MRAC
Department: Industrial Training
Category Code: 594/17
Qualification: SSLC + National Trade Certificate + Diploma
Date of Test: 19-07-2018
- Which colour wire is recommended for earthing as per IS code?
- Red
- Blue
- Black
- Green
- A Watt meter is used to measure _______________
- Only A.C. current
- Only D.C. current
- A.C. or D.C. power
- A.C. voltage
- Suitable motor for the compressor of a split Air Conditioner is ______________
- RSIR
- CSIR
- PSC or CSR
- None of these
- The relay used in H.C. Refrigerant is ___________
- LMS type
- Voltage type
- PTC type
- Current type
- What is the reason for overheating of the compressor of a Refrigerator?
- High working voltage
- Poor condensation
- Excess refrigerant in the system
- All of these
- The Latent Heat Value of NH3 Refrigerant is __________
- 650 BTU/lb
- 560 BTU/lb
- 565 BTU/lb
- 465 BTU/lb
- De-foresting timer is used for _________ in frost free refrigerator.
- Disconnecting the heater
- Connecting the heater
- Connecting and disconnecting the compressor
- Operating compressor and heater
- The eco-friendly refrigerant is _____________
- Freon-12
- Freon-22
- Hydrocarbon
- None of these
- Drier Strainer is used in Refrigeration System for
- Removing dust from air flow
- Removing moisture and air from refrigerant
- Removing non-condensable gas from air
- Removing dust particles and moisture from refrigerant
- Before compression, the condition of the Refrigerant is __________
- Low Pressure and Temperature Liquid
- High Pressure and Temperature Vapour
- Low Pressure and Low Temperature Gas
- High Pressure and Temperature Gas
- Use of Heat exchanger is _______________
- Super heats the liquid line
- Sub-cool the section line
- Heat exchanges suction line to discharge line
- Heat exchanges liquid line to suction line
- Suction pressure of ice plant with NH3 Refrigerant is ___________
- 65 to 75 psig
- 80 to 90 psig
- Below 30 psig
- Above 100 psig
- In summer season the Air Conditioner trips though OLP. What is the reason?
- Condenser may air block and ambient temperature is low
- Ambient temperature is low
- Condenser air block and high ambient temperature
- Over speed of condenser fan
- Frost Free Refrigerator defrosting method is _________________
- Hot gas defrosting
- Manual defrosting
- Water spray defrosting
- Electric heater defrosting
- Water cooled condenser is used in ____________
- Split air conditioner
- Window air conditioner
- Water cooler
- Central air conditioning plant
- Secondary refrigerant is used in ______________
- Milk Chilling Plant
- Chilling Plant
- Ice Plant
- All of these
- The R.H. of air required for human comfort is ___________
- 25%
- 75%
- 50%
- None of these
- On Psychrometric Chart wet bulb temperature lines are __________
- Horizontal
- Vertical
- Straight inclined sloping downward to the right
- Curved
- Tachometer is used to measure ____________
- Humidity in air
- Velocity of air
- Density of air
- Speed of compressor
- −252°F is equal to ________________ degree Celsius.
- −160.7
- −167.7
- −150.77
- −157.77
- An air conditioner consumes 5 Amps from 240 Volts and the PF is 0.8 its power is _________
- 690 Watts
- 985 Watts
- 950 Watts
- 960 Watts
- _______________ Compressor has less EER.
- Reciprocating Compressor
- Rotary Compressor
- Centrifugal Compressor
- Screw Compressor
- An oil separator is installed in-between _________
- Receiver and Expansion Valve
- Compressor and Condenser
- Condenser and Receiver
- Evaporator and Compressor
- Piercing valve is used to _____________
- Recover the gas
- Pinch the charging line
- Release the gas out
- Recover the oil
- Diameter of Capillary tube used in Refrigerator is _____________
- 0.055 inch
- 0.0361 inch
- 0.065 inch
- 0.0255 inch
- Automatic expansion valve controls the flow of Refrigerant to evaporator according to _______
- Pressure
- Temperature
- Pressure and Temperature
- None of these
- Dry ice is used for
- Cooling water
- Cooling milk
- Preserving foodstuffs
- None of these
- Substitute of Freon-12 refrigerant is __________
- 134 a
- Freon-22
- Freon-11
- None of these
- Secondary Refrigerant is useful because _________
- It is cheap
- Easily available
- It reduces the primary Refrigerant Piping
- None of these
- In Split air conditioners the following condenser is used ___________
- Forced convection air cooled
- Natural Convection air cooled
- Water cooled
- Evaporative type
- When is the Vacuum Pump used in refrigeration system?
- After gas charging
- Before gas charging
- Before leak arresting
- Before oil charging
- For easy bending and Flaring we use __________
- Annealed copper tube
- Plastic tube
- Brass tube
- M. S. tube
- The Refrigerant for a Refrigerator should have ____________
- High sensible heat
- Low latent heat
- High latent heat
- Low sensible heat
- Most of the domestic Refrigerators work on the following Refrigeration system
- Vapour Compression System
- Vapour Absorption System
- Thermo Electric System
- Air Compression System
- The dry bulb temperature and wet bulb temperature becomes equal at ___________ % RH.
- 100%
- 90%
- 50%
- None of these
- The chemical formula of R. 22 refrigerant is __________
- C Cl2F2
- CHClF2
- C CLF2
- CHCl2F2
- Halide torch is used for ______________ Refrigerants.
- Detect Leak of NH3
- Detect leak of CO2
- Detect leak of Freon group
- None of these
- Temperature control device used in Air Conditioner is known as __________
- Thermostatic Expansion Valve
- Thermostatic switch
- A.E.V.
- H.P.C.
- Volumetric efficiency of a compressor is expressed in _____________
- Percentage
- Calorie/Hr.
- BTU/Hr.
- Psig
- Inverter Refrigerator is working under the principle of
- Frequency modulating
- Voltage modulating
- Current modulating
- None of these
- Inverter Air Conditioner consumes ___________ current.
- More
- Less
- Very high
- None of these
- The term called triple point is _____________
- The temperature condition of a substance at solid state
- The pressure condition of a substance at liquid state
- The pressure/temperature condition is in balance at vapour state
- The Pressure/Temperature condition in which a substance is in balance in solid, liquid and vapour state
- Bi-metal thermostatis a device used in _____________
- Pressure circuit
- TEV circuit
- Defrosting circuit
- Compressor circuit
- Many bubbles in the liquid line sight glass are a sign that the system is
- Properly charged
- Contaminated with air
- Under charged
- Over charged
- The main parts of a Rotary Compressor are _____________
- Cylinder and piston
- Rotor and crank shaft
- Roller and cylinder
- All of these
- High side float valve is used in ____________
- Dry type evaporator
- Non-frosting evaporator
- Flooded type evaporator
- All of these
- Modification of R-12 to R-134a refrigerant in a refrigeration system is called ___________
- Recovery
- Retrofit
- Refilling
- Pump down
- Car Air Conditioner is a ____________ system.
- Vapour absorption
- Vapour Compression
- Air Compression
- None of these
- Magnetic Clutch is used in _____________
- Split A/C
- Window A/C
- Car A/C
- Package A/C
- Chilling plant is called as ____________
- Direct A/C Plant
- Indirect A/C Plant
- Multi split A/C
- None of these
- Chilled milk temperature in a milk chilling plant is ____________
- −5°C to 0°C
- 10°C to 12°C
- 2°C to 10°C
- None of these
- Sling Psychrometer is used to measure ____________
- Relative humidity
- Dry bulb and wet bulb temperature
- Cooling and heating of air supply
- None of these
- Voltage type relay is used in _______________ compressor motor.
- CSIR
- CSR
- RSIR
- PSC
- For condenser flushing __________ is used.
- CTC
- Trichloro ethylene
- Petrol
- All of these
- Mechanical Refrigeration system is also called as _____________
- Vapour absorption system
- Vapour compression system
- Liquid vapour system
- All of these
- Voltage type relay coil is connected to motor starting terminal is in ______________
- Series
- Parallel
- Series and parallel
- Series at starting time then parallel
- Thestarting capacitor value of a 1 Ton Split A/C is __________
- 40 to 60 mfd
- 80 to 100 mfd
- 100 to 120 mfd
- None of these
- _____________ method is used to detect leaksin Refrigeration system.
- Observation
- Soap Bubble
- Water tank dipping
- All of these
- Finand tube type evaporator is used in ____________
- Window AC
- Package AC
- Split AC
- All of these
- Direct Cool Refrigerator is also called as ____________
- Conventional type Refrigerator
- Frost free Refrigerator
- Non-frost Refrigerator
- None of these
- The safest chemical to use for descaling is _________
- Sulphuric acid
- Diluted HCl
- Diluted Nitric acid
- Bleaching powder
- The purpose of air filter in air conditioning system is ___________
- To remove dust and dirt from air
- To remove dust from refrigerant
- To remove humidity from air
- To remove air from A/C space
- In hot gas by pass method of capacity control of compressor, the hot compressed gas is _________
- By passed back to liquid line
- By passed back to suction line
- By passed back to evaporator line
- By passed back to liquid receiver
- The capacity of refrigerator is expressed in ____________
- Litre
- Tons of Refrigeration
- k Cal/TR
- None of these
- Tap used to avoid water wastage is __________
- Push tap
- Ball tap
- Lever type tap
- Regulating tap
- Floor level of water cooler to be checked by _________
- Measuring scale
- Viewing perpendicularly
- Using spirit level
- Using tube level
- Dead nut is used in Refrigeration flare fittings ____________
- For closing a connection end
- For controlling a line
- For operating on and off
- None of these
- The bush bearing of a compressor is lubricated by _____________
- Oil
- Grease
- Refrigerant
- Air and water
- Cylinder colour code of R134 a is _________
- Orange
- Green
- White
- Orchid
- What is the use of Crank case oil heater?
- Heats up the oil when compressor is idle
- Heats up the oil when compressor is ON
- Heats up the Refrigerant in crank case
- None of these
- Pressure relief valve is installed on ___________
- Compressor head
- Liquid receiver
- Discharge line of compressor
- All of these
- H.C. blend contains ______________
- 40% isobutene and 60% propane
- 50% isobutane and 50% propane
- 50% hydrogen and 50% carbon
- 50% fluorine and 50% oxygen
- Fan motor of split Air conditioner of 1 Ton capacity is __________
- PSC
- RSIR
- CSR
- Shade pole
- Spray nozzles of cooling tower is used for __________
- Sprays the water from evaporator
- Sprinkle the water from condenser
- Sprays the water from chiller
- All of these
- Evaporative condenser is used in _____________
- Ice plant
- Split air conditioner
- Package air conditioner
- Window air conditioner
- Thermometer is to measure the __________
- Latent heat
- Sensible heat
- Thermo heat
- Specific heat
- Duct is used to __________
- Distribute air from AHU to confined space
- AHU to out side of A/C room
- Return air from confined space to AHU
- All of these
- Pully Puller is used to remove __________
- Fly wheel and bearings from shaft
- Shaft from compressor
- Piston from cylinderpully
- Rings from piston
- Three phase motor is used in _____________
- Package A/C
- Multy split A/C
- Central A/C Plant
- All of these
- Service valve is used for ______________
- Charging gas to system
- Pressure testing
- Evacuating
- All of these
- Who among the following is described as "First Generation Feminist"?
- Arya Pallam
- Akkamma Cheriyan
- Anna Chandi
- Parvathy Nenmenimangalam
- Which film got the 'Best Film Award in the 89th Oscar Award Ceremony in 2017?
- Fences
- Moonlight
- La La Land
- Lion
- Who was called the Lincoln of Kerala?
- Ayyankali
- Pandit K. P. Karuppan
- Sree Narayana Guru
- Sahodaran Ayyappan
- Who wrote the autobiography 'Aathmakadhakkoru Amukham'?
- Lalithambika Antarjanam
- A. V. Kuttimalu Amma
- Lalitha Prabhu
- K. Devayani
- Which part of the Indian Constitution contains the Fundamental Rights?
- Preamble
- Part II
- Part III
- Part IV
- Name the first private bank in Kerala
- The Imperial Bank
- The Chartered Bank
- The Indian National Bank
- Nedungudi Bank
- Where was the Paliyam road situated?
- Chendamangalam
- Vaikom
- Guruvayur
- Udayamperur
- From which place in Kerala the first newspaper Rajyasamacharam was published?
- Chirakkal
- Vadakara
- Ottapalam
- Tellichery
- Who founded Samatva Samajam?
- Vaikunda Swami
- Chattampi Swamikal
- Nitya Chaitanya Yati
- Nataraja Guru
- In which year the National Food Security Act was passed in India?
- 2000
- 2007
- 2013
- 2017
- Who was the Editor of the magazine 'Rasikaranjini'?
- Kerala Varma Valiyakoyi Thampuran
- Ramakrishna Pillai
- Kodungallur Kunhikuttan Thampuran
- None of these
- Who was the translator of the conversation between Rabindranath Tagore and Sree Narayana Guru when they met at Sivagiri in 1922?
- Dr. Palpu
- R. Sankar
- T. K. Madhavan
- Kumaranasan
- From which country Indian Constitution borrowed Federal System?
- Russia
- Britain
- Germany
- Canada
- Name the magazine founded by M. C. Joseph
- Kalakaumudi
- Keraleeyam
- Yukthivadi
- Prabodhanam
- In which year the Hindus in Cochin got permission to temple entry?
- 1936
- 1948
- 1950
- 1956
- Name the movement founded by Vandana Siva
- Navadanya Movement
- Narmada Bachao Andolan
- Chipko Movement
- Plachimada Struggle
- Who initiated the Kerala Granhasala Sangham?
- K. N. Panicker
- P. N. Panicker
- Ulloor S. Parameswara Iyer
- Vallathol Narayana Menon
- Which day is observed as World Teacher's Day?
- None of these
- October 5
- November 5
- December 5
- Name the place where the play Atukalayilninnu Arangatheku was staged for the first time
- Angadippuram
- Pallimukku
- Thirunavaya
- Edakunni
- Name the Travancore Diwan who gave permission to wear blouse to all those women who embraced Christianity
- Colonel Munro
- M. E. Watts
- Thomas Austin
- None of these
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