RRB JOBS QUESTION BANK : JUNIOR ENGINEER (AC) TRUE OR FALSE

QUESTION BANK FOR SELECTION TO THE POST OF JUNIOR ENGINEER (AC)

INDICATE TRUE OR FALSE TO THE FOLLOWING:

1)       Without EMD the tender offer is valid.   False

2)       Amps is the unit of current    True

3)       Tinned copper conductor of 14SWG is used as earth continuity wire in the

4)        Internal Wiring system.    True

5)        Wood is the bad conductor of electricity.   True

6)        Oil is used as a insulation in the power transformers.  False

7)         The minimum capacity of power transformer on electrical General Services is 100KVA True

8)         Finance vetting is required, if the cost of NS item exceeds Rs. 50,000/- while

9)         Procuring through COS.  True

10)       The open tenders are to be opened in presence of a Accounts Officer.  True

11)       The codal life of VLRA batteries is 04 years.  True

12)       If a cell voltage is found less than 1.9 Volts, it should be weed out.  False

13)       The SPG of sulphuric acid which is used to make electrolyte is 1.835.  True

14)       The L1, L2 and Fan Circuit fuse rating is 16 A in Roof Junction Box.  True

15)       The bulk inverter capacity in AC 2 tier for cell phone charging is 6KVA.  False

16)       Single-phase preventer should be used to protect the motor from single phasing.  True

17)       The minimum safe value of insulation resistance of motor is 20 MΩ.  False

  18)       Multi meter is used to measure insulation resistance and megger is used to measure the winding resistance of the motor.  False

  19)       If a motor is getting unduly hot, the reason may be overloaded or bearing may be defective. True

  20)       Compressor works like a pump by drawing refrigerant vapor from the evaporator and sends to condenser.  True

21)       The change of liquid state into vapour state is called condensation.  False

22)       OL is provided to trip the condenser motor incase of over voltage and single phasing. False

23)       Due  point  is  the  temperature  of  air  at  which  the  moisture  present  in  air  starts condensing.  True

24)     The purpose of contactor provided in the control panel of RMPU is to switch ON supply to condenser motors.  True

25)     The purpose of TDR 1 provided in control panel of RMPU to delay compressor II operation for 2 minutes.  False

Study Kit for Railway Recruitment Board (RRB) Exams

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Courtesy: RRB 


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