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Indian Coast Guard Navik Question Paper
1. The difference between primary and secondary cell is that the secondary cell can be
(a) Recycled
(b) Recharged
(c) Reused
(e) Repaired
Ans (b)
2. The specific gravity of the charged cell will
(a) Decrease
(b) Remain same
(c) Increase
(d) None of above
Ans (c)
3. The equipment is earthed for the safety of
(a) Equipment
(b) Personnel
(c) Both
(d) None of above
Ans
4. The normal size of antenna is
(a) λ
(b) λ/2
(c) λ/4
(d) None of above
Ans (a)
5. An universal motor is the motor which can be operated with
(a) DC and single phase AC
(b) DC and three phase AC
(c) DC and single phase AC with same speed and output.
(d) None of above
Ans (c)
6. The main advantage of stationary armature (rotating field generator) is
(a) It is easier to insulate stationary armature winding
(b) It is easier to rotate the field
(c) It is not advisable that the field is to be stationery at higher voltages
(d) None of above
Ans (a)
7. If the rated speed of the primover is reduced the output frequency of the generator will
(a) Increase
(b) Decrease
(c) No change
(d) None of above
Ans (b)
8. If A and B are the input of the EX-OR gate; the output will be
(a) Aâ²B + ABâ²
(b) Aâ²Bâ² + AB
(c) Aâ² + AB
(d) AB + 2 AB
Ans (a)
9. Complementary Metal Oxide Semiconductor (CMOS) is primarily used in
(a) High packing density applications
(b) Low power applications
(c) Both (b) & (c)
(d) None of above
Ans (b)
10. Arc Time Constant of ACBs is
(a) It is time required to regain dielectric strength of the medium
(b) It is time required to quench the arc of the medium
(c) It is time required to charge the capacitor
(d) None of above
Ans (a)
11. The protection level of ICCP is gauged with respect to
(a) Reference potential
(b) Anode potential
(c) Hull potential
(d) None of above
Ans (a)
12. Main advantage of Laser Ring Gyro on Conventional Gyro is
(a) Laser Gyro does not have moving parts
(b) It uses laser
(c) It is cheap in cost
(d) None of above
Ans (a)
13. Gyro sphere consists of
(a) One rotor
(b) Two rotors
(c) Three rotors
(d) Combination of (a) & (b)
Ans (b)
14. âMuffâ couplings are used to connect
(a) Emergency cables in case of the damage
(b) Radio cable used with radars
(c) Power cables for shore supply
(d) Wires
Ans (a)
15. The SID is the abbreviation of
(a) Safe Identification Device
(b) Sole Identification Device
(c) Support Identification Device
(d) None of above
Ans (a)
16. Frequency range of âSâ Band radar is
(a) 3110 MHZ â 3200 MHZ
(b) 3040 GHZ â 3060 GHZ
(c) 3040 MHZ â 3060 MHZ
(d) 3110 GHZ â 3200 GHZ
Ans (b)
17. The gain of unidirectional antenna is more than increases on Omni directional antenna due to
(a) Increase in power density
(b) Decrease in power density
(c) Power density remains same
(d) None of above
Ans (a)
18. Laser Range Finder (LRF) fitted on board AOPVs uses
(a) NDYAG Laser
(b) Semiconductor Laser
(c) Gas Laser
(d) Dye Laser
Ans (a)
19. Eye Safe Laser means
(a) One can continuously look into the laser and it will not affect the eye
(b) Looking into the laser for small duration will not affect the eye
(c) Accidental exposure of eye to the laser will not affect the eye
(d) None of above
Ans (c)
20. Power factor improving devices are located at
(a) Receiving end of power
(b) Transmitting end of power
(c) In between receiving and transmitting end of power
(d) Both at (a) & (b)
Ans (b)
21. In Echo sounder AVC will ensure
(a) Signal strength is constant under all reception conditions
(b) Signal strength is to be only amplified from higher depths
(c) Signal strength is to be reduced in all conditions
(d) None of above
Ans (a)
22. In case of semiconductor diode barrier potential developed across the junction can be
(a) Used as a cell
(b) Cannot be used as a cell
(c) Can be used as a low potential battery
(d) None of above
Ans (b)
23. CCDs are used in TV cameras
(a) To have high resolution
(b) Reduced size
(c) Both (a) & (b)
(d) None of above
Ans (c)
24. AELs stand for
(a) Automotive Energy Lights
(b) Accessible Engineering Ledgers
(c) Auto Equipment Ledgers
(d) None of above
Ans (a)
