Refrigeration Mechanic (HER) - Health Services

 Question Paper Code: 14/2020/OL

Category Code: 223/2017

Exam: Refrigeration Mechanic (HER)

Department Health Services

Date of Test 12-09-2020

Question1:-Day after tomorrow is Friday, then what is the previous day of today ?
        A:-Friday
        B:-Wednesday
        C:-Tuesday
        D:-Thursday
        Correct Answer:- Option-C

Question2:-If TOP is coded as POT, then TABLE is coded as
        A:-Elbat
        B:-Batle
        C:-Telab
        D:-Betla
        Correct Answer:- Option-A

Question3:-Find out the missing letter of the following series : B, E, H, _
        A:-L
        B:-J
        C:-K
        D:-O
        Correct Answer:- Option-C

Question4:-How much is 40% of 3 hour and 30 minutes ?
        A:-2 Hr. 10 mts.
        B:-1 Hr. 24 mts.
        C:-4 Hr. 30ts.
        D:-2 Hr. 20 mts.
        Correct Answer:- Option-B

Question5:-A teacher is to school, like a nurse is to
        A:-Factory
        B:-Laboratory
        C:-Prison
        D:-Hospital
        Correct Answer:- Option-D

Question6:-If BAG is coded as 217, decode the number 6554.
        A:-DEF
        B:-FEED
        C:-BEEF
        D:-BED
        Correct Answer:- Option-B

Question7:-In a month with 31 days, the first day of the month is Tuesday, then the last day of the month is
        A:-Monday
        B:-Friday
        C:-Wednesday
        D:-Thursday
        Correct Answer:- Option-D

Question8:-Insert the missing number :
14      9     5
13      7     6
21      8     —

        A:-12
        B:-15
        C:-13
        D:-18
        Correct Answer:- Option-C

Question9:-Arun walks 100 metre in 4 minutes. How many minutes will be take to complete 575 metre ?
        A:-25 mts.
        B:-20 mts.
        C:-23 mts.
        D:-30 mts.
        Correct Answer:- Option-C

Question10:-Find the odd-man out.
        A:-36
        B:-49
        C:-81
        D:-70
        Correct Answer:- Option-D

Question11:-The ratio of actual mass of water vapour in a given volume of moist air to the mass of water vapour in the same volume of saturated air at the same temperature and pressure is known as
        A:-Wet bulb depression
        B:-Absolute humidity
        C:-Degree of saturation
        D:-Relative humidity
        Correct Answer:- Option-D

Question12:-A standard ice point temperature corresponds to the temperature of
        A:-Water at zero degree Celsius
        B:-Solid and dry ice
        C:-Ice at –4 degree Celsius
        D:-Mixture of ice and water under equilibrium conditions
        Correct Answer:- Option-D

Question13:-The suction pipe diameter of refrigerating unit compressor in comparison to delivery side is
        A:-Bigger
        B:-Smaller
        C:-Smaller or bigger
        D:-Unpredictable
        Correct Answer:- Option-A

Question14:-At 100% relative humidity, the temperatures, dry bulb, wet bulb, dew point and saturation are
        A:-Equal
        B:-Different
        C:-Three equal, one different
        D:-None of the above
        Correct Answer:- Option-A

Question15:-Humidity ratio is the mass of water vapour present in
        A:-1𝑚3 of wet air
        B:-1𝑚3  of dry air
        C:-1kg of wet air
        D:-1 kg of dry air
        Correct Answer:- Option-D

Question16:-Critical pressure of a liquid is the pressure
        A:-Above which liquid will remain liquid
        B:-Above which a liquid becomes gas
        C:-Above which a liquid becomes gas
        D:-At which all the phases exist together
        Correct Answer:- Option-A

Question17:-Ammonia is
        A:-Non-toxic
        B:-Non-inflammable
        C:-Toxic and non-inflammable
        D:-Highly toxic and inflammable
        Correct Answer:- Option-D

Question18:-For room air distribution, the maximum variation in temperature is
        A:-0 degree Celsius
        B:-1 degree Celsius
        C:-–1 degree Celsius
        D:-5 degree Celsius
        Correct Answer:- Option-B

Question19:-The device used to finish a drilled hole
        A:-File
        B:-Die
        C:-Tap
        D:-Reamer
        Correct Answer:- Option-D

Question20:-Presence of moisture in a refrigerant affects the working of
        A:-Compressor
        B:-Condenser
        C:-Expansion valve
        D:-Evaporator
        Correct Answer:- Option-C

Question21:-The boiling point of ammonia is
        A:-–100 degree Celsius
        B:-–50 degree Celsius
        C:-–33.3 degree Celsius
        D:-33 degree Celsius
        Correct Answer:- Option-C

Question22:-Which of the following refrigerant has the highest critical point temperature ?
        A:-Freon-11
        B:-Freon-12
        C:-Ammonia
        D:-Freon-22
        Correct Answer:- Option-A

Question23:-One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of ice in
        A:-In 1 hour
        B:-In 24 hour
        C:-In 12 hour
        D:-In 6 hour
        Correct Answer:- Option-B

Question24:-In Electrolux refrigerator
        A:-Ammonia is absorbed in hydrogen
        B:-Ammonia is absorbed in water
        C:-Ammonia evaporates in hydrogen
        D:-Hydrogen is absorbed in ammonia
        Correct Answer:- Option-C

Question25:-One tonne of refrigeration is equal to
        A:-210 KJ/min
        B:-3.5 kW
        C:-3.5 kJ/s
        D:-All the above
        Correct Answer:- Option-D

Question26:-On psychrometric chart, dry bulb temperature lines are
        A:-Horizontal
        B:-Vertical
        C:-Curved
        D:-Inclined
        Correct Answer:- Option-B

Question27:-The comfort conditions in air conditioning system are defined by
        A:-22°C dry bulb temperature and 60% relative humidity
        B:-25°C dry bulb temperature and 100% relative humidity
        C:-20°C dry bulb temperature and 75% relative humidity
        D:-25°C dry bulb temperature and 40% relative humidity
        Correct Answer:- Option-A

Question28:-Condensing temperature in a refrigerator is the temperature
        A:-Of cooling medium
        B:-Of freezing zone
        C:-Of evaporator
        D:-At which a refrigerant becomes liquid
        Correct Answer:- Option-D

Question29:-The function of brine agitator in ice plant is to
        A:-Increase refrigeration effect
        B:-Increase COP
        C:-Obtain uniform temperature of brine
        D:-All of the above
        Correct Answer:- Option-C

Question30:-A sling psychrometer is used to measure
        A:-Volume
        B:-Humidity
        C:-Pressure
        D:-Velocity
        Correct Answer:- Option-B

Question31:-A product of decomposition of oil resulting from impurities or moisture is
        A:-Sludge
        B:-Foam
        C:-Purge
        D:-None of these
        Correct Answer:- Option-A

Question32:-Out of the following compressors which one has no moving parts ?
        A:-Reciprocating
        B:-Rotary
        C:-Thermo
        D:-Centrifugal
        Correct Answer:- Option-C

Question33:-The heat rejection factor is given by
        A:-1 + COP
        B:-1 – COP
        C:-1 + 1/COP
        D:-1 – 1/COP
        Correct Answer:- Option-C

Question34:-The refrigerant for a refrigerator should have
        A:-High sensible heat
        B:-High total heat
        C:-High latent heat
        D:-Low sensible heat
        Correct Answer:- Option-C

Question35:-Freon group refrigerants are
        A:-Inflammable
        B:-Toxic
        C:-Nontoxic and non-inflammable
        D:-Toxic and non-inflammable
        Correct Answer:- Option-C

Question36:-In a Carnot cycle, heat is transferred at
        A:-Constant pressure
        B:-Constant volume
        C:-Constant temperature
        D:-Constant enthalpy
        Correct Answer:- Option-C

Question37:-A process in which substance is exposed to mechanical or chemical action of air is called
        A:-Agitation
        B:-Aeration
        C:-Aspiration
        D:-Atomization
        Correct Answer:- Option-B

Question38:-The capacity of domestic refrigerator is of the range of
        A:-0.1 to 0.3 TR
        B:-1 to 3 TR
        C:-3 to 5 TR
        D:-5 to 7 TR
        Correct Answer:- Option-A

Question39:-The tubes of shell and tube condenser in ammonia refrigerant is made up of
        A:-Steel
        B:-Copper
        C:-Brass
        D:-Glass
        Correct Answer:- Option-A

Question40:-A bootstrap air cooling system has
        A:-One heat exchanger
        B:-Two heat exchanger
        C:-Three heat exchanger
        D:-No heat exchanger
        Correct Answer:- Option-B

Question41:-A system of fixed mass and identity whose boundaries are determined by the space of matter occupied in it is called
        A:-Closed system
        B:-Open system
        C:-Isolated system
        D:-Control volume
        Correct Answer:- Option-A

Question42:-Formation of frost on evaporator in refrigerator
        A:-Results in loss of heat due to poor heat transfer
        B:-Increases heat transfer rate
        C:-Has no effect
        D:-Decreases compressor power
        Correct Answer:- Option-A

Question43:-Chemical formula of Freon-12
        A:-𝐶𝐶𝑙2𝐹2
        B:-𝐶𝐶𝑙3 𝐹2
        C:-𝐶𝐶𝑙3𝐹
        D:-𝐶𝐶𝑙𝐹2
        Correct Answer:- Option-A

Question44:-Heating of air without changing its moisture content takes place on psychrometric chart along
        A:-A vertical line upward
        B:-A vertical line downward
        C:-A horizontal line of the constant dew point
        D:-Curved line
        Correct Answer:- Option-C

Question45:-Drift loss in cooling tower is of the order of
        A:-1 to 5%
        B:-5 to 10%
        C:-10 to 20%
        D:-25 to 50%
        Correct Answer:- Option-C

Question46:-Out of the following which one is an example for intensive property ?
        A:-Temperature
        B:-Pressure
        C:-Density
        D:-All the above
        Correct Answer:- Option-D

Question47:-Which of the following property remains constant during throttling process ?
        A:-Internal energy
        B:-Pressure
        C:-Entropy
        D:-Enthalpy
        Correct Answer:- Option-D

Question48:-According to Charles law for a perfect gas
        A:-𝑇2/𝑇1 = 𝑃2/𝑃1, if V is kept constant
        B:-𝑇2/𝑇1 =𝑉2/𝑉1, if P is kept constant
        C:-𝑃2/𝑃1 =𝑉1/𝑉2 , if T is kept constant
        D:-PV/T = constant
        Correct Answer:- Option-B

Question49:-The bank of tubes at the back of domestic refrigerator is
        A:-Condenser tubes
        B:-Evaporator tubes
        C:-Throttling tubes
        D:-Capillary tubes
        Correct Answer:- Option-A

Question50:-In cooling tower water is cooled by the process of
        A:-Condensation
        B:-Fusion
        C:-Evaporation
        D:-All of the above
        Correct Answer:- Option-C

Question51:-The latent heat of water is
        A:-540 K.Cal/Kg
        B:-240 K.Cal/Kg
        C:-120 K.Cal/kg
        D:-60 K.Cal/kg
        Correct Answer:- Option-A

Question52:-Thermal conductivity of air with rise in temperature
        A:-Increases
        B:-Decreases
        C:-Remains constant
        D:-May increase or decrease
        Correct Answer:- Option-A

Question53:-The thermostatic expansion valve is also called
        A:-Constant superheat valve
        B:-Constant pressure valve
        C:-Constant temperature valve
        D:-Constant volume valve
        Correct Answer:- Option-A

Question54:-A grill along with a damper is called
        A:-Register
        B:-Duct
        C:-Diffuser
        D:-Attenuator
        Correct Answer:- Option-A

Question55:-The refrigeration plants are charged by introducing refrigerants from the cylinder at the
        A:-Suction of compressor
        B:-Receiver
        C:-Evaporator
        D:-Expansion valve
        Correct Answer:- Option-B

Question56:-Domestic refrigerator working on a vapor compression cycle uses the following type of expansion device.
        A:-Electrically operating throttling valve
        B:-Manually operated valve
        C:-Thermostatic valve
        D:-Capillary tube
        Correct Answer:- Option-D

Question57:-The measurement of temperature is given by which thermodynamic law ?
        A:-Zeroth law
        B:-First law
        C:-Second law
        D:-Third law
        Correct Answer:- Option-A

Question58:-A drier is located in the
        A:-Liquid line
        B:-Vapour line
        C:-Compressor
        D:-Evaporator
        Correct Answer:- Option-A

Question59:-Out of the following refrigerants, which one has lowest freezing point ?
        A:-Freon-22
        B:-Freon-12
        C:-Ammonia
        D:-Sulphur di oxide
        Correct Answer:- Option-B

Question60:-The power per tone in KW of refrigeration is given by
        A:-3.5/COP
        B:-3.5 ×COP
        C:-350/COP
        D:-35/COP
        Correct Answer:- Option-A

Question61:-The index which correlates the combined effects of air temperature, relative humidity and air velocity on the human body, is known as
        A:-Mean radiant temperature
        B:-Dew point temperature
        C:-Effective temperature
        D:-None of these
        Correct Answer:- Option-C

Question62:-The process of adding of moisture to air at constant dry bulb temperature is known as
        A:-Humidification
        B:-Dehumidification
        C:-Heating
        D:-Cooling
        Correct Answer:- Option-A

Question63:-Undercooling in a refrigeration cycle
        A:-Increases COP
        B:-Decreases COP
        C:-Don't chance COP
        D:-Unpredictable
        Correct Answer:- Option-A

Question64:-Superheated vapor behaves
        A:-Exactly as gas
        B:-As steam
        C:-As ordinary vapor
        D:-Approximately as gas
        Correct Answer:- Option-D

Question65:-The most widely used superconductor is
        A:-Nichrome
        B:-Tungsten
        C:-Niobium
        D:-Lead
        Correct Answer:- Option-C

Question66:-The unit of thermal diffusivity is
        A:-m/hK
        B:-m/h
        C:-𝑚2/ℎ
        D:-𝑚2/ℎ𝑘
        Correct Answer:- Option-C

Question67:-Dust and other impurities in air are removed by
        A:-Air washer
        B:-Centrifugal device
        C:-Adhesive impregnated filter
        D:-Any of the above
        Correct Answer:- Option-D

Question68:-The refrigeration effect in a dry evaporator compared to flooded evaporator in a similar plant
        A:-Is same
        B:-Is more
        C:-Is less
        D:-Is Unpredictable
        Correct Answer:- Option-C

Question69:-An air washer is used in a refrigeration system for
        A:-Cleaning
        B:-Cooling
        C:-Humidification
        D:-All of the above
        Correct Answer:- Option-D

Question70:-If suction pressure decrease, then COP
        A:-Decreases
        B:-Increases
        C:-Has no change
        D:-First increases and then decreases
        Correct Answer:- Option-A

Question71:-Cooling towers are installed in places where
        A:-Water is available in plenty
        B:-Water is scarce
        C:-For big plants
        D:-For small plants
        Correct Answer:- Option-B

Question72:-When two refrigerants are mixed in the proper proportions, the mixture forms a third refrigerant called
        A:-Synthetic refrigerant
        B:-Low pressure refrigerant
        C:-Azeotropic refrigerant
        D:-Auxiliary refrigerant
        Correct Answer:- Option-C

Question73:-Air refrigerators works on
        A:-Carnot cycle
        B:-Strling cycle
        C:-Reversed Joule cycle
        D:-Atkinson cycle
        Correct Answer:- Option-C

Question74:-Psychrometry is the science of measuring of _________ in air.
        A:-Temperature
        B:-Pressure
        C:-Moisture
        D:-Heat
        Correct Answer:- Option-C

Question75:-Lithium bromide in vapor absorption refrigeration system is used as
        A:-Refrigerant
        B:-Cooling substance
        C:-Lubricant
        D:-Absorbent
        Correct Answer:- Option-D

Question76:-The vertical distance, the air moves after it leaves the outlet and reaches at the end of blow is called
        A:-Damper size
        B:-Draft
        C:-Drift
        D:-Charge
        Correct Answer:- Option-C

Question77:-A DC shunt motor has
        A:-Constant speed
        B:-Variable speed
        C:-Variable velocity
        D:-Pulsating speed
        Correct Answer:- Option-A

Question78:-The ratio of supplied air to the air leaving the room is known as
        A:-Entrainment ratio
        B:-Discharge ratio
        C:-Supply ratio
        D:-Velocity ratio
        Correct Answer:- Option-A

Question79:-Reciprocating refrigeration compressor uses following type of valve
        A:-Rotary valve
        B:-Ring plate valve
        C:-Poppet valve
        D:-Gate valve
        Correct Answer:- Option-B

Question80:-Thermal insulator provide ________ path to heat.
        A:-Smaller
        B:-Longer
        C:-Zero
        D:-None of the above
        Correct Answer:- Option-B

Question81:-A Baudelot evaporator is used to
        A:-Chill ice
        B:-Produce icecream
        C:-Separate cream from milk
        D:-Produce ice cube
        Correct Answer:- Option-C

Question82:-The most suitable refrigerant for commercial ice plant is
        A:-Brine
        B:-Ammonia
        C:-Freon
        D:-Air
        Correct Answer:- Option-B

Question83:-Moisture in refrigeration system is removed by
        A:-Drier
        B:-Dessicant
        C:-Filter drier
        D:-Any of the above
        Correct Answer:- Option-D

Question84:-Air cooler reduces temperature and
        A:-Reduces humidity
        B:-Increases humidity
        C:-Compress air
        D:-Compress refrigerant
        Correct Answer:- Option-B

Question85:-Which of the following is not desirable property of good insulating material ?
        A:-Light weight
        B:-High heat conductivity
        C:-Odorless
        D:-Conformability
        Correct Answer:- Option-B

Question86:-The following type of expansion device is utilized in flooded evaporator
        A:-Motor operated valve
        B:-Self-actuated expansion valve
        C:-Capillary tube
        D:-Float valve
        Correct Answer:- Option-D

Question87:-The solar radiation reaches earth by beam radiation and
        A:-Diffused conduction
        B:-Diffused radiation
        C:-Diffused convection
        D:-Beam convection
        Correct Answer:- Option-B

Question88:-As relative humidity decreases, the dew point will be
        A:-Lower than wet bulb temperature
        B:-Higher than wet bulb temperature
        C:-Equal to wet bulb temperature
        D:-Having no relation
        Correct Answer:- Option-A

Question89:-The unit of capacitance is expressed by
        A:-Farad
        B:-Watt
        C:-Ampere
        D:-Volts
        Correct Answer:- Option-A

Question90:-An electrically operated switch used to disconnect the starting winding from the circuit, when the motor reaches 75% of its rated speed
        A:-OLP
        B:-Starting capacitor
        C:-Relay
        D:-Running capacitor
        Correct Answer:- Option-C

Question91:-Which part of Indian Constitution deals with Fundamental Rights ?
        A:-Part 12
        B:-Part 5
        C:-Part 4
        D:-Part 3
        Correct Answer:- Option-D

Question92:-Which article of Indian Constitution deals with Amendment of Constitution ?
        A:-Article 356
        B:-Article 36
        C:-Article 368
        D:-Article 370
        Correct Answer:- Option-C

Question93:-How many schedules are there in Indian Constitution ?
        A:-8 Schedules
        B:-10 Schedules
        C:-12 Schedules
        D:-5 Schedules
        Correct Answer:- Option-C

Question94:-Which Amendment added Right to Education to Indian Constitution ?
        A:-86th Amendment
        B:-84h Amendment
        C:-73h Amendment
        D:-68h Amendment
        Correct Answer:- Option-A

Question95:-Who was the Chairman of Drafting Committee of Indian Constitution ?
        A:-Dr. Rajendra Prasad
        B:-Jawahar Lal Nehru
        C:-Dr. B. R. Ambedkar
        D:-K. M. Munshi
        Correct Answer:- Option-C

Question96:-Who is the Ex-Officio Chairman of Rajya Sabha ?
        A:-Prime Minister
        B:-Vice President
        C:-President
        D:-Governor
        Correct Answer:- Option-B

Question97:-Name the body which framed Indian Constitution.
        A:-Parliament
        B:-Constituent Assembly
        C:-Rajya Sabha
        D:-Lok Sabha
        Correct Answer:- Option-B

Question98:-Which Article of Indian Constitution abolishes untouchability ?
        A:-Article 17
        B:-Article 18
        C:-Article 32
        D:-Article 15
        Correct Answer:- Option-A

Question99:-What is the minimum age required to contest in Lok Sabha Election ?
        A:-35 years
        B:-30 years
        C:-40 years
        D:-25 years
        Correct Answer:- Option-D

Question100:-How many members are elected to Kerala Legislative Assembly ?
        A:-140
        B:-141
        C:-142
        D:-9
        Correct Answer:- Option-A