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You Are On Multi Choice Question Bank SET 3285
164251. Relay is protection device used in :
(A): Evaporator (B): Compressor (C): Condenser (D): Thermostat
164252. Weak insulation can be checked by :
(A): Ammeter (B): Meggar (C): Tong tester (D): Line tester
164253. In window type air-conditioners the following expansion device used :
(A): Float valve (B): Thermostatic expansion valve (C): Capillary tube (D): Hand valve
164254. Freon 12 ideal pressure is :
(A): 2.0 Kg/Cm2 (B): 2.5 Kg/Cm2 (C): 3.5 Kg/Cm2 (D): 6.0 Kg/Cm2
164255. The storage capacity of a oxygen cylinder is :
(A): 6.0 m3 (B): 6.5 m3 (C): 7.01 m3 (D): 7 m3
164256. Which type of flux is used for soldering G.I sheets?
(A): NH4C1 (B): ZnCl2 (C): Resin (D): HC1
164257. The cooling capacity of 1.0 TR is :
(A): 6000 BTU/Hr (B): 12000 BTU/Hr (C): 18000 BTU/Hr (D): 24000 BTU/Hr
164258. The freezing temperature of water is :
(A): 1°C (B): -1°C (C): -4°C (D): 0°C
164259. The mechanical fault in refrigerator system is :
(A): High voltage (B): Condenser coil dirty (C): Over load protector burnt (D): Relay defective
164260. Boiling point of /?600o is :
(A): -15.8°C (B): -14.8°C (C): -11.8°C (D): -10.8°C
164261. Internal energy of a substance is proportional to ;
(A): Velocity (B): Temperature (C): Pressure (D): None of the above
164262. The closing of chumer and top cover done air tight by:
(A): ‘O’ ring (B): Seal (C): Gasket (D): Sticking tape
164263. The thread angle of National fine thread is :
(A): 25° (B): 35° (C): 40° (D): 45°
164264. Select the ‘pitch' of a medium hacksaw blade from the following:
(A): 1.8 mm (B): 1.0 mm and 4 mm (C): 1.4 mm and 1.0 mm (D): 0.8 mm
164265. Compressor used in window A/c is :
(A): Rotary compressor (B): Reciprocating compressor (C): Sealed compressor (D): Open type compressor
164266. The most possible leakage spots in the refrigerator is :
(A): Capillary tube (B): Drazing tube joints (C): Condenser (D): Evaporator
164267. One Kilowatt is equal to :
(A): 1.34 H.P (B): 1.66 H.P (C): 1 H.P (D): 1.5 H.P
164268. The operation of split A/c produces :
(A): High noise (B): Medium noise (C): Low noise (D): No noise
164269. Ball bearing can be removed by using :
(A): Ring spanner (B): Mallet (C): Puller (D): Hammer
164270. The metal wire which give good earth contact is :
(A): Copper (B): GI (C): Brass (D): Aluminium
164271. Name the temperature at which moisture condenses on a surface :
(A): Relative humidity (B): Grains of moisture (C): Dew point temperature (D): Humidity
164272. Name the correct tool which is used to cut wires :
(A): Wire cutter (B): Tube cutter (C): Shear (D): Combination plier
164273. The unit of pressure in SI system is :
(A): N/m (B): N/m1 (C): N/m2 (D): N/m2
164274. The amount of heat required in calories to raise the temperature of one gram of substance through 1°C is:
(A): Sensible heat (B): Specific heat (C): Latent heat (D): B.t.u
164275. Specify the thickness of a sheet metal having 18 SWG (Standard Wire Gauge):
(A): 1.02 (B): 1.63 (C): 1.01 (D): 1.22
164276. The size of 1/2' copper tube is equal to :
(A): 12 mm (B): 13 mm (C): 14 mm (D): 15 mm
164277. 350 litres refrigerator compressor is used.
(A): 1/4 H.P (B): 1/5 H.P (C): 1/6 H.P (D): 1/6 H.P
164278. The temperature in degree centigrade for human comfort is :
(A): 15 (B): 17 (C): 19 (D): 21
164279. If the vacuum level inside the refrigerator is 30 mm of Hg the moisture boiling temperature will be :
(A): 25°C (B): 30°C (C): 35°C (D): 40°C
164280. The size of the gasket is depends on :
(A): Width (B): Thickness (C): Length (D): Area
164281. The material with highest ductility :
(A): Cast iron (B): Thickness (C): Copper (D): Area
164282. To cool 20 litres of water from 32°C to 12.5°C in one hour. Calculate the amount of heat removed:
(A): 370 Kcal/Hr (B): 380 Kcal/Hr (C): 390 Kcal/Hr (D): 400 Kcal/Hr
164283. In large capacity air — conditioning applications the following expansion device is used :
(A): Capillary tube (B): Thermostatic expansion valve (C): Float valve (D): Automatic expansionvalve
164284. The Global Warming Potential (GWP) of R134a is :
(A): 1500 (B): 1400 (C): 1300 (D): 1200
164285. When a pressure switch cut-out, it will make the drive to:
(A): Stop (B): Start (C): Run on various speed (D): Run slowly
164286. When wet bulb and dry bulb temperature are equal the humidity is :
(A): 100% (B): 0.9 (C): 0.8 (D): 0.6
164287. Who was known as India's unofficial ambassador in England?
(A): Dadabhai Naoroji (B): Gopala Krishna Gokhalac (C): Subash Chandra Bose (D): Bipin Chandra Pal
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