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ITI Previous Papers REFRIGERATION AND AIR CONDITIONING TECHNICIAN(NSQF)

PREVIOUS YEAR PAPER
TRADE NAMEREFRIGERATION AND AIR CONDITIONING TECHNICIAN(NSQF)
TRADE TYPEEngineering
YEAR2
EXAM DATE2024-08-28
EXAM TIME15:00:17:00
Question Paper MOCK TEST

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TRADE THEORY

What is the advantage of variable speed pumping load control in chiller AC plant?

  1. Control valves are eliminated
  2. Cooling coil can be eliminated
  3. High cost of maintenance
  4. Heating control is easy

What is the name of automatic expansion valve based on its function?

  1. Constant pressure valve
  2. Thermostatic valve
  3. High side float valve
  4. Low side float valve

What is the process of removing the frost accumulated in the surface of evaporator?

  1. Frosting
  2. Defrosting
  3. Scaling
  4. Descaling

What is the name of part marked as X in AHU?

  1. Mixing box
  2. Fan
  3. Filter
  4. Cooling coil

Which zone of central HVAC all-air system, individual supply air ducts are provided for each room in a building?

  1. Single- zone
  2. Dual- zone
  3. Triple- zone
  4. Multi- zone

What is the name of part marked X used for mounting compressor base?

  1. Shims
  2. Packing sheet
  3. “O” ring
  4. C-clamp

Which type heat removal changes the refrigerant vapour to liquid in water cooled condenser?

  1. Latent heat of condensation
  2. Heat to sub cool the liquid
  3. Super heat from vapour
  4. Sensible heat to desuper heat the vapour

How much cut out point is set in high pressure control in package AC using R-22?

  1. 15 Kg/cm2
  2. 20 Kg/cm2
  3. 12 Kg/cm2
  4. 17 Kg/cm2

Which part of the system the charging line of recovery machine is connected for recovery of refrigerant?

  1. Liquid line
  2. Discharge line
  3. Suction line
  4. Evaporator

Which operating condition opens the HPC control switch in car AC?

  1. If evaporator pressure exceeds safe limit
  2. If there is continuous rain outside
  3. If condenser pressure exceeds safe limit
  4. If there is continuous air velocity

How the total heat of air is represented in psychrometric chart?

  1. Sensible heat
  2. Enthalpy
  3. Latent heat
  4. Entropy

Which parts of cooling tower usually has a sump for cold water discharge connections?

  1. Drift eliminators
  2. Cold water basin
  3. Nozzles
  4. Fill

What is the pH valve of pure water?

  1. 7
  2. 6
  3. 9
  4. 8

What is the benefit of preventive maintenance in AC plant?

  1. Reduce water flow
  2. Prevent plant’s break down
  3. Increase running cost
  4. Decrease refrigerant charge

Which blowers have rotors, it "trap" air and push it through housing?

  1. Positive- displacement
  2. Common Blower
  3. Propeller Blower
  4. Negative- displacement

Which metal pipe is permissible in an ammonia system?

  1. Wrought iron
  2. Brass
  3. Copper
  4. Zinc

Which mechanism makes up water level in cooling tower basin?

  1. Strainer
  2. Float valve
  3. Pump
  4. Nozzles

What is the ideal distance required in between the compressor pulley and electric clutch to prevent Electric clutch plate slipping in automobile air conditioning system?

  1. 1 to1.5mm
  2. 0.3 to 0.5mm
  3. 0.7 to 0.9mm
  4. 1.7 to 1.9mm

Why crank case heater is used in the Refrigeration & air conditioner compressor oil sump?

  1. Improve lubricity of oil
  2. Minimise refrigerant being absorbed in the oil
  3. Improve miscibility property of oil
  4. Improve viscosity of oil

Which load is first started in cold storage using water cooled condenser?

  1. Compressor motor
  2. Cooling tower fan
  3. Door alarm bell
  4. Condenser water pump

What type of evaporator used 90 lts. visible cooler?

  1. Plate type evaporator
  2. Fins type evaporator
  3. Box type evaporator
  4. Bare and tube type evaporator

Which material is used for making air ducts in chiller AC plant?

  1. Thermo Cole
  2. Galvanised iron
  3. Glass wool
  4. Cast iron

Which tool is used for descaling the condenser tubes in shell and tube condenser?

  1. Steel brush
  2. Sponge brush
  3. Teflon fibre brush
  4. Brass brush

What is the name of system where refrigerant and water heat exchange takes place?

  1. VRF
  2. Direct expansion
  3. Chilled water
  4. VRV

Which part is indicated "X" in figure?

  1. Pressure sensor
  2. Differential adjustment
  3. Diaphragm
  4. Cut in adjustment

What is the purpose of relief valve in force feed lubricating system?

  1. Supply oil to the pump
  2. Remove impurities from oil
  3. Avoids excessive oil pressure
  4. Supply oil to the strainer

What rating fuse will be used to check magnetic electric clutch of automobile A/C through battery?

  1. 4.5A
  2. 7.5A
  3. 5.5A
  4. 10A

What is the name of component used in air distribution system?

  1. Multi blade damper
  2. Single blade damper
  3. Diffuser
  4. Duct

Which periodic servicing requires, unit shutdown and transfer of all the food load in same capacity running unit?

  1. Monthly
  2. Quarterly
  3. Weekly
  4. Daily

What is the periodical checking for blower belt in package AC?

  1. Weekly
  2. Yearly
  3. Monthly
  4. Daily

Which one indicates adjustable out let grill in figure?

  1. Z
  2. Y
  3. W
  4. X

Which one is thermostat in figure?

  1. 4
  2. 1
  3. 2
  4. 3

Which RAC system belongs to centralised air conditioning?

  1. Split AC
  2. Window AC
  3. Chiller plant AC
  4. Cassette AC

Which valve activates or deactivates the hot gas defrosting cycle?

  1. Gate valve
  2. Butterfly valve
  3. King valve
  4. Solenoid valve

Why separate recovery machines are required for CFC and HFC system?

  1. Avoid cross contamination
  2. Increase head pressure
  3. Decrease head pressure
  4. Increase suction pressure

What is the purpose of air filter?

  1. Improve performance
  2. Ensure clean air
  3. Circulate air
  4. Cool air

Which type of evaporator is used in split air conditioner?

  1. Shell and tube
  2. Fin and tube
  3. Plate and tube
  4. Bare tube

What is desirable boiling point of a refrigerant?

  1. Low temperatures
  2. Extra high temperatures
  3. High temperatures
  4. Medium temperatures

WORKSHOP CALCULATION SCIENCE

Which symbol is used to denote co-efficient of friction?

  1. γ (Gamma)
  2. μ (Meu)
  3. α (Alpha)
  4. β (Beta)

Where the centre of gravity of a circle lies?

  1. At its centre
  2. Any where on its radius
  3. Any where on its circumference
  4. Any where on its diameter

Who prepares the cost of estimation?

  1. Draughts man
  2. Quality Inspector
  3. Estimator
  4. Operator

What is the name of a booklet, the rates of various terms are indicated?

  1. Price bunch
  2. Price tag
  3. Price bank
  4. Price catalogue

What is the name of the structure formed, if a steel is heated for about 723oC?

  1. Ferrite
  2. Austenite
  3. Cementide
  4. Martensite

What is a hand book?

  1. Design book of latest works
  2. Model book of various works
  3. Type of reference work or other collection of instruction
  4. Dictionary of materials

ENGINEERING DRAWING

Which is the symbol for normally closed push button switch?

Which of the following refers to the term C.O.P. of refrigeration?

  1. Co-efficient of plant
  2. Cooling for performance
  3. Co-efficient of performance
  4. Capacity of performance

Which is the symbol of flow meter?

Which is the symbol of air dryer?

Tubular heat exchanger symbol is…..

Refrigeration capacity is measured in______

  1. Kg
  2. Celsius
  3. Fahrenheit
  4. Tonne

EMPLOYABILITY SKILLS

To become a gig worker, a person should find gig work opportunities by means of _______

  1. Connect with friends, people you might know and groups in your communities.
  2. Find a multi national company.
  3. Independently search for job.
  4. Study about gig work.

What is the process of formally introducing oneself called?

  1. Self-introduction
  2. Decision
  3. Seeking
  4. Hiring

If your coworkers don't agree with your project idea, what's a good way to handle it with an entrepreneurial mindset?

  1. Stick to your idea without listening to others
  2. Stop talking about it
  3. Ask for feedback and make your idea better with their help
  4. Give up on your idea

The activity of setting up a business or businesses, taking on financial risk in the hope of profit is called _________

  1. Entrepreneurship
  2. Merchant
  3. Bank manager
  4. Sales executive

While purchasing an equipment for your trade, how will you make decision?

  1. Choose the first machine you see
  2. Pick the machine which you like
  3. Look at all the details, think carefully about the needs & budget and then make the choice
  4. Choose the cheapest machine available

What does a workplace look like after a pandemic like covid?

  1. Less production
  2. Mix of work from home and office
  3. Less employees
  4. Empty space

"Gig" economy is ______

  1. Regular job
  2. Indian economy
  3. Foreign economy
  4. A system of work where people work in part-time

Which of the following actions in a official meeting show appropriate workplace etiquette?

  1. Chatting with coworkers
  2. Checking phone and respond to messages
  3. Keeping the phone on silent mode and actively participate in the discussion
  4. Interrupt the speaker in meeting

If you want to start a bakery business, what would you focus on first in your business plan?

  1. Calculating how much money need to start the business
  2. Planning how to advertise the bakery on social media
  3. Selecting a catchy name for the bakery
  4. Figuring out how the business will grow

A secure Wi-Fi is one ______

  1. open to the public
  2. has a password to login
  3. that allows everyone to connect
  4. open by landline

The ability to wait and stay calm ______

  1. patience
  2. interpersonal skill
  3. problem solving
  4. creativity

Important skills required for the future of work is _______

  1. Avoid learning new skills.
  2. Master internet skills.
  3. Avoid building professional relationships.
  4. Learn making reels and TikTok videos.

If a teammate is struggling to complete their assigned task, what should you do?

  1. Ignore their struggle and focus on your own tasks
  2. Offer to help and support them to complete their task
  3. Complain to the superior about their lack of contribution
  4. Criticize them for not being efficient

What does having a green mindset mean?

  1. Ignoring pollution and waste management
  2. Using resources without considering sustainability
  3. Making choices that harm the environment
  4. Caring for the environment and using resources wisely

When you do not know how to use a new machine, what will be your action?

  1. Stay silent till someone teaches you
  2. Ask for help and learn how to use the machine
  3. Take a break and do it later
  4. Leave the job

Alexa, Google, Siri are in the category of _______

  1. Musical instruments
  2. Voice recorders
  3. Voice recognition devices
  4. Translation devices

Which of the following are some informal situations within the workplace?

  1. Working with files
  2. Working in a laptop
  3. Working with a desk top
  4. Having a meal in the office canteen

What are some people related problems in a workplace?

  1. More qualified workers
  2. More experienced works
  3. Workers do not communicate while facing the problem
  4. More staff in the workplace

Which app is a widely used for screen casting from your mobile phone?

  1. WhatsApp
  2. Mobizen
  3. Webcast
  4. Facebook

Fill up the blanks with suitable words so as to become a meaningful sentence.

  1. gave
  2. gives
  3. helps
  4. help

Which of the following is a good work habit?

  1. Choosing easy tasks
  2. Not giving up when something goes wrong
  3. Not following workplace rules
  4. Getting tensed when work is challenging

Which one is a search engine?

  1. Flicker
  2. Face book
  3. Hotmail
  4. Google

What are the different steps in design thinking?

  1. Imagine, Decide, Create and Try
  2. Listen, Choose, Plan, Try, Ask
  3. Try, Create and Decide
  4. Imagine, Plan and Try

What does working well together mean?

  1. Be friendly with all
  2. Sharing ideas, listening, finding solutions together
  3. Participate get-together
  4. Not doing any mistakes

When we want to type using our voice, we are using _______

  1. voice of google
  2. voicing technique
  3. voice recognition feature
  4. voice recorder

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