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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 DATE2024-08-22
EXAM TIME09:00:11:00
Question Paper MOCK TEST

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TRADE THEORY

Which gas is used for treating cooling tower water to destroy bacteria and virus?

  1. CO2
  2. O3
  3. O2
  4. N2

Why the stainless steel metal is used to make evaporator in ice plant?

  1. Galvanic
  2. Reactive
  3. Erosive
  4. Non corrosive

Which type of electrically operated valve is used in cold storage plant?

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

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

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

What is the purpose of using the water cooled condenser in industrial AC plant?

  1. Reduce the pressure
  2. Absorb less heat from system
  3. Increase the temperature
  4. Reject more heat to water

What is the effect of providing counter flow of water and refrigerant in shell and tube condenser?

  1. To reduce load on water pump
  2. To increase heat transfer efficiency
  3. To improve life of condenser
  4. To decrease the flow of refrigerant

Which safety control stops the compressor motor if there is leakage of refrigerant?

  1. HP cut out
  2. Thermostat
  3. Oil pressure cut out
  4. LP cut out

Which brazing method is used for large number of components?

  1. Gas flame brazing
  2. Electric resistance brazing
  3. Furnace brazing
  4. Electric induction brazing

What is the advantage of bottle cooler whose evaporator coil winding kept inside storage tank?

  1. Carelessly can handle
  2. Space more
  3. Bottle cooling fast
  4. Cleaning easy

What is meant by total pressure in a duct?

  1. Velocity pressure + suction pressure
  2. Static pressure + velocity pressure
  3. Velocity pressure - static pressure
  4. Suction pressure + discharge pressure

Which system maintains indoor air quality by adding fresh air and conditioned air to offset heating or cooling loads?

  1. Air distribution system
  2. Electrical control system
  3. Refrigeration system
  4. Refrigerant control system

Which chemical is added to water to maintain the pH of water to the range of 8 to 9?

  1. Sodium nitrate
  2. Sodium chlorite
  3. Sodium carbonate
  4. Sodium hydroxide

What is the name of part marked X in direct drive coupling of compressor and motor?

  1. Motor shaft key
  2. Spacers
  3. Crank shaft
  4. Motor shaft

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

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

What is the name of part marked as ‘x’ in the fan motor compartment?

  1. Drive Belt
  2. Blower Cover
  3. Belt guard
  4. Motor Shaft

What is the direction of airflow delivered in a centrifugal blower?

  1. Parallel to the shaft
  2. Inclined throw of air horizontally
  3. Perpendicular to the shaft
  4. Inclined throw of air vertically

Which compressor uses a unique design with two scrolls, one fixed and one is movable?

  1. Wobble plate
  2. Scroll type
  3. Screw type
  4. Rotary type

What is the benefit of preventive maintenance in AC plant?

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

What is low side pressure range in HFC134a car AC at an ambient range of 32oC to 35oC?

  1. 2 Kg/cm2 - 4 Kg/cm2
  2. 4 Kg/cm2 - 6 Kg/cm2
  3. 1 Kg/cm2 - 3 Kg/cm2
  4. 3 Kg/cm2 - 5 Kg/cm2

What term used while inevitable clearance necessary between the three end tips of the scroll vanes and the baseplates?

  1. Radial leakage
  2. Vane leakage
  3. Port leakage
  4. Axial leakage

How the indoor unit acts during heating cycle of heat pump?

  1. Evaporator
  2. Condenser
  3. Expansion device
  4. Electrical heater

What is meant by static pressure?

  1. Still air pressure in duct
  2. Air diffusing pressure
  3. Moving air pressure
  4. Ambient air pressure

Which solution is used to clean the liquid level sight glass in a brine chilling evaporator type system?

  1. Diluted Nitric acid
  2. Diluted sulphuric acid
  3. Diluted citric acid
  4. Diluted hydrochloric acid

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

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

Which Commercial compressor is equipped with shaft, cylinder and piston assembly along with other accessories?

  1. Screw, scroll type compressor
  2. Screw compressor
  3. Scroll compressor
  4. Reciprocating compressor

What is the name of part marked as X in electronic expansion valve?

  1. Motor
  2. Piston sleeve
  3. Orifice assembly
  4. Lead screw

Which fan is used to handle the direction of air flow 90o away from the inlet?

  1. Centrifugal blower fan
  2. Vane axial propeller fan
  3. Axial propeller fan
  4. Tube axial propeller fan

What is the advantage of using indirect expansion chiller AC system?

  1. Less quantity of secondary refrigerant
  2. Less quantity of primary refrigerant
  3. Quick cooling
  4. Cooling tower is not needed

Which part of DX type central AC plant work for reducing the pressure and amount of liquid refrigerant in Refrigeration cycle?

  1. Evaporator
  2. Drier strainer
  3. Liquid receiver
  4. Expansion valve

Which part is indicated by "X" in figure?

  1. Evaporator coil
  2. Air grill
  3. Condenser coil
  4. Water coil

Which valve is closed first for pump down operation in cold storage plant?

  1. Vent valve
  2. Drain valve
  3. King valve
  4. Purge valve

Which switch is interlocked to become ‘on’ if the power isolator is ‘off’ in package AC?

  1. Thermostat
  2. Crankcase heater
  3. Blower motor
  4. Compressor starting

How the warm water in central air conditioner plant transfers the heat to the atmosphere?

  1. Through the Fan
  2. Through the blower
  3. Through the cooling tower
  4. Through the compressor

Where to assemble all the controls, microprocessor display board and indicating LED in package AC?

  1. Blower compartment
  2. Panel board
  3. Body
  4. DOL

What is the function of part marked as X?

  1. Circulate the brine solution
  2. Freeze the brine solution
  3. Heat the brine solution
  4. Pump the brine solution

What is the name of component marked X as in recycling machine?

  1. Schrader valve
  2. Pressure relief valve
  3. Oil return valve
  4. Piercing valve

How the condenser capacity is expressed?

  1. Kg/KCal
  2. KCal/Kg
  3. KCal/KgoC
  4. KCal/hr

Which location is excellent for installing Natural draft cooling tower in view of better performance?

  1. Under stair case
  2. In side room
  3. In between room
  4. Open area

WORKSHOP CALCULATION SCIENCE

Which line is called as chord?

  1. ED
  2. AB
  3. OE
  4. OD

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

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

What is a hand book?

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

Who prepares the cost of estimation?

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

What is the formula for circumference of a circle?

Which force is directly proportional to the normal reaction between contacting surfaces?

  1. Frictional force
  2. Allied force
  3. Pushing force
  4. Pulling force

ENGINEERING DRAWING

Name the part marked X.

  1. Strainer
  2. Spring
  3. Bellow
  4. Needle

Rotary pump symbol is …..

Which is the symbol for normally closed push button switch?

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

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

Identify the symbol.

  1. Connecting wire
  2. Resistor
  3. Switch (open)
  4. Switch (closed)

Safety valve symbol is…

EMPLOYABILITY SKILLS

In a manufacturing unit, the packaging process is taking longer than usual time, causing delays in shipments. What should the workers do?

  1. Discuss and think about different ways to pack faster
  2. Continue packaging the same way
  3. Ignore the problem
  4. Complain to the management

While applying for a job through email, what are the documents need to be attached?

  1. Birth certificate
  2. Resume, Course and Training Certificates
  3. Photographs from childhood
  4. Address Proof

If a factory manager get big order to deliver but there are shortage of workers. In that situation, the manager will _______

  1. Cancel the orders
  2. Request workers to work extra hours
  3. Stop working
  4. Ignore the problem

Punctuality means _______

  1. informal
  2. politeness
  3. done by punching machine
  4. being on time

The ability to wait and stay calm ______

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

Why is it important to think of new ways to solve problems?

  1. New ideas can make work easier or faster
  2. To waste time
  3. It is unnecessary to try new things
  4. It is fun to try new things

What describes "Human Resources" in a furniture manufacturing company?

  1. its employees
  2. its sales record
  3. its products
  4. its profit

The ability to connect well with people _______

  1. leadership
  2. creativity
  3. interpersonal skill
  4. time management

A person with high emotional intelligence has _______

  1. lot of positive qualities
  2. ego
  3. physical strength
  4. lot of negative qualities

A resume should be _______

  1. bold and colourful
  2. having long and detailed information
  3. short and precise
  4. having acronyms and abbreviation

While working, it is important to share our ideas with others because _______

  1. talking can help and make ideas better.
  2. to impress others.
  3. to show off your knowledge.
  4. to make others feel included.

Complete the sentence with suitable describing words

  1. beautiful
  2. good
  3. big
  4. spacious

If your first design of design thinking doesn't work, what should you do?

  1. Give up on it
  2. Purchase some other design
  3. Ask for feedback and try to improve
  4. Make something else

When you start a discussion on a topic, what do you say?

  1. Let us finish
  2. Let me say
  3. Let you start
  4. Let us discuss

Which section of the Skill India Digital Platform helps users find physical training centers nearby?

  1. Skill courses
  2. Recommendations
  3. Job Exchange
  4. Centres

While presenting your business plan to potential investors, why is it important to actively listen to their questions and provide thoughtful answers?

  1. To understand the concerns of the investors and build their confidence in your plan
  2. To show your communication skills
  3. To avoid eye contact
  4. To show off your expertise

Which is the most important document required by companies to select people for job?

  1. Conduct certificate
  2. Your resume
  3. Your certificate
  4. Sports certificate

While writing an email, why it is important to state the subject clearly?

  1. To show he has good English skills
  2. To tell the company what the email is about
  3. Email cannot be sent without a subject line
  4. Subject should not be left blank

Imagine you are setting up a mobile repair shop. Which of the following is the most important for its success?

  1. Offering repair services at a higher price
  2. Picking the right shop name
  3. Putting up flyers in the neighbourhood
  4. Setting up the shop in a busy area

_______ is influenced by rapid change in technology

  1. Nature of work
  2. Future of work
  3. Working capital
  4. Workforce

Good practice for green mind set is _________

  1. using aircondictioners all the time
  2. keep lights on all the times
  3. taking lot of printouts
  4. Separate and recycle waste

Which option below describes a "gig" in the gig economy?

  1. A job with full-time hours and benefits
  2. A typical 9-5 job
  3. No specific task
  4. A specific task or project

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

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

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

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

While applying for a position as fitter, which of the following email subject lines would be the most suitable?

  1. Urgent Attention Needed
  2. Application for Fitter Position - [Your Name]
  3. Fitter Job needed
  4. Applying for a new Job

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