ITI RAC Objective Type Questions And Answers : While preparing for any exam, you should look at the solved question paper of that exam so that you will know what type of questions were asked in this exam. So if you are preparing for RAC ITI, then in this post we are giving you a solved question paper of RAC ITI which you can solve yourself and improve your preparation and along with it its answers are also given so that you will also get its correct answer.
Refrigeration And Air Conditioning Model Question paper
ITI RAC Objective Type Questions And Answers
1. For fire to burn, the presence of fuel, heat and ……….. is constantly required.
• Hydrogen
• Oxygen
• Water
• Nitrogen
Answer: Oxygen
2. Dry powder extinguishers are used on what type of fires?
• Class ‘A’
• Class ‘B’
• Class ‘C’
• Class ‘D’
Answer: Category ‘D’
3. …………..Fire extinguishers may be filled with carbon-tetra-chloride and bromochloro difluoro methane (BCF)?
• Halon
• Foam
• Water
• Carbon dioxide
Answer: Helen
4. In the beginning of the 18th century, ………… were used for refrigeration.
• Chlorine
• Chlorofluorocarbon
• Ice
• Nitrogen
Answer: Ice
5. The metal bars which contain Allen keys, wrenches and pliers to tighten nuts are made of……..
• Octagonal metal bars
• Square metal bars
• Hexagonal metal bars
• Round metal bars
Answer: Hexagonal metal bar
6. Which gauge is used to measure fine vacuum?
• Compound gauge
• Thermocouple vacuum gauge
• Barometer
• Manometer
Answer: Thermocouple vacuum gauge
7. The device used to lift extremely hot objects is called?
• Floor protector
• Burr remover
• Fire extinguisher
• Tongs
Answer: Tong
8. The minimum capacity (water) of a recovery cylinder is?
• 10.9 Kg
• 11.9 Kg
• 12.9 Kg
• None of these
Answer: 11.9 Kg
9. The specially designed tool used to straighten/clean the condenser and evaporator is called?
• Fin tool/comb
• Control valve
• Air velocity meter
• Air blower
Answer.Fin Tool/Comb
10. The files used for general filing purposes are?
• Rough file
• Bastard file
• Second cut file
• Smooth file
Answer: Bastard Files
11. ………. has individual, sharp and pointed teeth in a line and is useful for filing wood?
• Double cut
• Single cut
• Curled cut
• Rasp cut
Answer: Rasp cut
12. Which file is used for internal curvature?
• Knife edge file
• Triangular file
• Half round file
• Square file
Answer: Half round file
13. The size of a vice is determined by the ………. of its jaws?
• Width
• Length
• Height
• Depth
Answer: Width
14. Universal surface gauge is used for?
• For setting the datum surface of the job parallel to the machine
• To protect the work surface from damage
• For holding the work for sawing
• For filing internal curled surfaces
Answer: For setting the datum surface of the job parallel to the machine
15. ………….. are used to support the job and provide perpendicular/angular plane for marking?
• Rocker arm
• Scriber
• Spindle
• Angle plate
Answer: Angle plate
16. The angle of prick punch is?
• 10° to 30°
• 30° to 60°
• 60° to 90°
• 90° to 120°
Answer: 30° to 60°
17. ……….. is a spring loaded lever which helps in setting the vernier slab at any position on the beam scale?
• Vernier slide
• Movable jaw
• Depth bar
• Thumb lever
Answer: Thumb lever
18. When using a straight scriber, the zero setting of a vernier caliper is ……….. of the datum plane?
• Above
• Below
• Behind
• In front
Answer.Up
19. ………..are used for cutting keyways, grooves and slots?
• Flat chisel
• Cross cut chisel
• Half round nose chisel
• Diamond point chisel
Answer: Cross cut cheese
20. The angle formed between the top face of the cutting point and the work surface of the cutting end is called ……….?
• Rake angle
• Clearance angle
• Helix Gangan
• Side angle
Answer: rake angle
21. Peen is a part of which of the following?
• Face
• Cheek
• Eye-hole
• Hammer head
Answer: Hammer head
22. What is the weight of an engineer’s hammer used for marking?
• 125 grams
• 250 grams
• 1 kilogram
• 1.5 kilograms
Answer: 250 grams
23. The angle of countersink riveting is?
• 75°
• 80°
• 90°
• 120°
Answer: 75 °
24. The mechanical process used to produce flat seats for bolt heads, washers and nuts on the opening head of a drilled hole is?
• Counter boring
• Spot facing
• Drilling
• Milling
Answer: Spot facing
25. What is used to make items like cauldrons, buckets, ovens and cabinets?
• Steel sheets
• Galvanized iron sheets
• Aluminium sheets
• Tin plates
Answer: Galvanized iron sheets
26. Angle sheets, C – clamps, stakes and mallets are types of which of the following?
• Measuring instruments
• Fire extinguishers
• Folding tools
• Hammers
Answer: Folding equipment
27. To avoid tearing, the minimum distance between the metal end and the centre of a rivet should be?
• Equal to the diameter of the rivet
• Twice the diameter of the rivet
• Thrice the diameter of the rivet
• Quadruple the diameter of the rivet
Answer: Twice the diameter of the rivet
28. ………… are used to cut small diameter (less than 4 mm) copper and aluminium wires?
• Flat nose pliers
• Long nose pliers
• Round nose pliers
• Side cutting pliers
Answer: Side cutting pliers
29. What are used to make small holes in wooden objects?
• Bradall
• Poker
• Gimlet
• Screw driver
Answer: Gimlet
30. What is the tool used to remove nails from wood?
• Pincers
• Hand drill
• Bradall
• Poker
Answer: Pinsche
31. The joint made in a single stand conductor in an overhead line for tapping electrical energy is called?
• Married joint
• T-joint
• Britannia straight joint
• Western Union joint
Answer: Britannia Strait Joint
32. What is the unit of power?
• Volt
• Ampere
• Watt
• Hertz
Answer: Watt
33. What is the capacitance of a capacitor that uses a charge of 1.5 coulombs to produce a voltage of 75 volts across its plates?
• 0.01 Faraday
• 0.02 Faraday
• 0.03 Faraday
• 0.04 Faraday
Answer: 0.02 Faraday
34. The value of 1 micro Faraday (1μF) will be?
• 10-3F
• 100-6F
• 100-9F
• 100-12F
Answer: 100-6F
35. Dissolved acetylene filled cylinders are colored in?
• Black
• Maroon
• Green
• Yellow
Answer: Maroon
36. ……….. are used to mix oxygen and acetylene gases in required proportion and to control them.
• Blow pipe
• Rubber hose pipe
• Regulator
• Spark lighter
Answer: Blow pipe
37. Induction welding is a type of ………
• Electric welding process
• Gas welding process
• Friction welding process
• Other welding process
Answer: Electric welding process
38. Which of the following is not a type of gas welding process?
• Oxy acetylene welding
• Oxy hydrogen welding
• Flash butt welding
• Oxy liquefied petroleum gas welding
Answer: Flash butt welding
39. Which of the following is used for welding ferrous metals, stainless steel, aluminium and thin metal sheets?
• TIG welding
• Summer arc welding
• Oxy acetylene welding
• Thermit welding
Answer: TIG welding
40. Which of the following flames contains the highest amount of acetylene gas?
• Neutral flame
• Oxidizing flame
• Carburizing flame
• None of the above
Answer: Carburizing flame
41. ………..removes the heat contained by refrigerants?
• Compressor
• Evaporator
• Receiver
• Condenser
Answer: Condenser
42. What are the common methods used for temperature control in domestic refrigerators?
• Starting relay
• Thermostat control
• Evaporation
• Deep freezing
Answer: Thermostat control
43. Which refrigeration system is used for storage and transportation of frozen food?
• Ice refrigeration system
• Dry refrigeration system
• Vapour absorption refrigeration system
• Liquid gas refrigeration system
Answer: Liquid gas refrigeration system
44. 1 ton of refrigeration is equal to?
• 2.5 KW
• 3.5 KW
• 4.5 KW
• 5.5Kw
Answer: 3.5 kW
45. Which of the following is not a type of current relay?
• Box type relay
• LMS Fist –
• Pin type relay
• Hot wire relay
Answer: Hot wire relay
46. ………., is the differential setting of cut-in and cut-out temperatures?
• Addition
• Difference
• Multiplication
• Division
Answer: Difference
47. ………..is an electromagnet that opens and closes mechanical machines?
• Solenoid coil
• Push button
• Thermostat
• Pressure stats
Answer: solenoid coil
48. In halide torch test if freon charge leaks into the system, a small amount of leakage will change its colour from blue to ………..
• Red
• Yellow
• Maroon
• Green
Answer: Green
49. At what pressure does the gauge show zero?
• Vacuum pressure
• Critical pressure
• Absolute pressure
• Atmospheric pressure
Answer:Atmospheric pressure
50. What is the colour of cylinders filled with ammonia?
• Red
• Light blue
• Green
• White
Answer: Light blue
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