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RRB JOBS QUESTION BANK : JUNIOR ENGINEER (AC) FILL IN THE BLANKS
QUESTION BANK FOR SELECTION TO THE POST OF JUNIOR ENGINEER (AC)
FILL IN THE BLANKS:
1) The process of removing heat from low temperature level and rejecting at high temperature is called. REFRIGERATION.
2) Any substances for change of its state at constant temperature absorbs/give up heat is called LATENT HEAT.
3) The sum of sensible heat and latent heat of substance in process is called ENTHALPY.
4) The latent heat of fusing ice is 144 BTU/LB.
5) The unit of refrigeration is TON OF REFREGIRATION – 12000 Btu/Hr or 3023.98 K.Cal/Hr.
6) The temperature measured by ordinary thermometer is called SENSIBLE HEAT.
7) What is the boiling point of water 100 C.
8) AT what temperature water starts freezing_ 0 C.
9) One watt is 3.412 BTU.
10) One BTU is 0.252 K.calaries.
11) The unit of heat is BTU OR K.CAL
12) RMPU means ROOF MOUNTED PACKAGE UNIT
13) The setting of HP cutout in RMPU coaches is 415 psi.
14) The setting of LP cutout in under slung coaches is 35 psi.
15) The boiling point of refrigerant R22_ -40.8 C.
16) The boiling point of refrigerant R12. – 29.8 C.
17) Artificial respiration is required to the person met with electrical accident.
18) R12 is being replaced with R-134a in latest Refrigeration system.
19) The latent heat of evaporation IS THE HEAT REQUIRED TO CHANGE THE LIQUID INTO VAPOUR.
20) The temperature maintained in the refrigerator is LESS then 0 C.
21) The dry bulb and vet bulb temperatures equals then the RH is 100%
22) The moisture absorption in refrigeration circuit is done by DEHYDRATOR CUM FILTER.
23) The commonly used refrigerants are R 12 & R 22
24) The lubrication of system in the sealed compressors is done by FREEZOL
25) The 3-phase voltage unbalance in supply should not exceed 2.5. % To 5%
26) For maintaining power supply quality the rate of change of frequency should not exceed. 1 HZ/Sec.
27) The voltage of 11 KV supply is 11000V
28) Tender Notice is to be published for. Open tender
29) Copper is the good conductor of electricity.
30) Completion estimate is not required for calling tender.
31) Contingencies charges mean Transportation charges.
32) Detailed estimate is to be prepared for sanctioned works.
33) Detailed estimate needs sanction of HOD.
34) The fire extinguisher used for Electrical fire is CO2
35) Fire is the combination of material and temperature & Oxygen.
36) B Type of fire extinguisher used to nullify the oil fires.
37) Electric type of fire is clarified as D type.
38) CO2 type fire extinguisher is used for electrical fires.
39) Ordinary fire can be extinguished by water.
40) RUBBER HAND GLOVES are to be used while operating isolator handle in substations.
41) Ordinary fire can be extinguished by WATER OR SAND.
42) Artificial respiration is required to the person met with ELECTRICAL accident.
43) Abbreviation for IOD is INJURED ON DUTY
44) The accident causes with loss of human life is called fatal accident.
45) If a man touches a live wire, he gets shock/electrocuted.
46) CTC type extinguisher is used for ELECTRICAL fire.
47) If a transformer catches fire FOAM type of fire.
48) The fire extinguisher used for Electrical fire is CO2 TYPE.
49) Fire is the combination of Material, temperature and oxygen.
50) B type of fire extinguisher used to nullify the oil fires.
51) Electric type of fire is clarified as D type.
52) CO2 type fire extinguisher is used for ELECTRICAL fires.
53) Soda ash type fire extinguisher is used for GENERAL fires.
54) CTC OR FOAM type of fire extinguishers will be used to extinguisher chemical fires.
55) Axle Driven system working on 110 V DC supply.
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