Quiz: Electrical Engineering 17 Mar 2021

Quiz: Electrical Engineering
Exam: SSC JE
Topic: Miscellaneous

Each question carries 1 mark.
Negative marking: 1/4 mark
Time: 10 Minute

Q1. Negative voltage regulation is indicative that the load is
(a) Inductive
(b) Capacitive
(c) Inductive or Resistive
(d) None of the above

Q2. A field excitation of 20 A in a certain alternator results in an armature current of 200 A in short circuit and a terminal voltage of 1000 V in open circuit. The magnitude of internal voltage drop within the machine at a load current of 100 A is:
(a) 50 V
(b) 500 V
(c) 1000 V
(d) 750 V

Q3. If the maximum current of a half-wave rectified wave is 10 A, its RMS value is given by
(a) 3.10 A
(b) 5.0 A
(c) 6.37 A
(d) 7.07 A

Q4. A dynamometer wattmeter can be used for
(a) AC measurement only
(b) Both AC & DC measurement
(c) DC measurement only
(d) None of the above

Q5. In a 3-phase power measurement by two wattmeter method, both the watt meters had identical readings. The power factor of the load is:
(a) 0.8 lagging
(b) 0.8 leading
(c) Zero
(d) Unity

Q6. What is the inductive reactance if the Q of a coil is 60, and the winding resistance is 5 Ω?
(a) 12 Ω
(b) 300 Ω
(c) 30 Ω
(d) 0.083 Ω

Q7. For protection of transformer against all kinds of incipient faults, which relay is used:
(a) Buchholz relay
(b) Earth-fault relay
(c) Over current relay
(d) All of the above

Q8. What type of earthing is used by transmission lines?
(a) Plate earthing
(b) Rod earthing
(c) Strip earthing
(d) Both (a) & (c)

Q9. What is the dimension of the copper strips used for the strip earthing?
(a) 25 mm * 4 mm
(b) 25 mm * 3 mm
(c) 30 mm * 4 mm
(d) 30 mm * 3 mm

Q10. The illumination at a point 5 metre below a lamp is 6 LUX. The candela power of the lamp is:
(a) 30
(b) 150
(c) 180
(d) 200

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