Prepare for ONGC Assistant Technician (Electrical) and Junior Technician recruitment examination with official previous years' solved question papers across Basic Electrical Principles & Ohm's/Kirchhoff's Laws, Magnetism & Electromagnetic Induction, AC Fundamentals & Polyphase Circuits, Transformers & Substation Maintenance, DC Machines & 3-Phase Induction Motors, Synchronous Alternators & Rig Power Generation, Motor Control Centres (MCC) & Switchgear Protection, Flameproof (Ex-d) Equipment for Oil & Gas Hazardous Areas, Underground Power Cabling, Electrical Measuring Instruments, Industrial Earthing Systems, and Workshop Electrical Safety Standards.
Marking pattern: +1.00 positive, 0.00 negative marking (Official ONGC CBT Scheme — No Negative Marking; 100 Questions, 100 Marks).
The mean of candle powers of a source of light in all directions in the horizontal plane passing through the luminous centre of the source of light is called:
A three-phase current source inverter can be operated in:
What will be the voltage drop at the junction of metal carbon brush and commutator of a DC motor?
When a disc makes slow motion even at no load, then this error is termed as:
A double cage rotor is the induction motor which has two cages in order to:
The number of input variables which a NOT gate can have is:
How can the polarity of DC generator be reversed?
The amount of light energy falling per second on a unit area held normally at a unit distance from a standard candle is called:
Which transistor circuit arrangement is most widely used?
Calculate the efficiency of a lamp of $230\text{ V}$, $0.8\text{ A}$ and total flux of $3550\text{ lm}$.
In a surface conduit wiring system, a cable drawn in to the conduit by means of a thin steel or GI wire is known as:
The ratio of the energy consumed during a given period to the energy which would have been used if the maximum demand had been maintained throughout the period is called:
The phase angle is positive if a practical circuit has:
Generally, an electrolytic capacitor provides:
Calculate the voltage across a resistor in a certain circuit having resistance of $78\;\Omega$ and carrying a current of $3.1\text{ A}$?
In the logic symbol of an inverter gate, the bubble (small circle) may be placed at output or input. This bubble represents:
In which type of circuit breakers does current chopping predominantly occur?
The illumination produced by a uniform source of 1 candle power on the inner surface of a sphere of 1 cm radius is called:
At which condition is the efficiency of a transformer maximum?
For a sinusoidal waveform, the normal value of the form factor is:
The amount of power output a PV module produces at standard test conditions is called:
Which of the following Indian Electricity Rules pertaining to domestic installations is applicable to supply and use of energy at domestic consumer's premises?
How is the direction of current marked when the magnetic lines of force are clockwise?
A commercial alternator has:
When field resistance of a DC shunt generator is increased beyond its critical value, then the generator: