List of top Questions asked in OJEE

Determine $I_L$ by using Thevenin’s theorem. 

The phasor diagram of a synchronous machine connected to an infinite bus is shown in the figure below. The machine is acting as, 

If the number of poles of an alternator is increased, the generated e.m.f.
A 5000 kVA, 1100 V, 50 Hz, Y-connected 3-phase alternator has armature resistance of 0.1 $\Omega$/phase and synchronous reactance of 1.5 $\Omega$/phase. Find the generated emf per phase, power factor is unity.
The power supplied to a three phase induction motor is 32 kW and stator losses are 1200 W. The slip is 5%, determine the rotor copper loss.
Determine the torque developed by a 350 V d.c. motor having an armature resistance of 0.5 $\Omega$ and running at 15 rev/s. The armature current is 60 A.
A dc generator running at 30 rev/s generates an e.m.f. of 200 V. Determine the percentage increase in the flux per pole required to generate 250 V at 20 rev/s.
A three-phase transformer has 600 primary turns and 150 secondary turns. If the supply voltage is 1.5 kV determine the secondary line voltage on no-load when windings are connected in delta-star.
A single phase transformer is rated at 40 kVA. The transformer has full-load copper losses of 800 W and iron losses of 500 W. Determine the transformer efficiency at half full-load and 0.8 power factor.
A 6 kVA, 100 V/500 V, single phase transformer has a secondary terminal voltage of 485.50 Volts when loaded. Determine the regulation of the transformer.
The no. of equations and variables in Peirce’s geometry
Dimethyl formamide (DMF) at boil is a solvent for
Nylon-4 is made by the polymerisation of
Willowing machine is required in the processing of
Decortication is related with
Tenacity of polynosic in g/den
The viscose solution should have a viscosity
During drawing crystallinity of a fibre
The terry towel is
The strength utilization of yarn in a woven fabric is
Mountaineering rope should have
The cross section of spinneret used for producing hollow fibre
Two cotton fibre varieties A and B having linear density of 3.2 and 4 (microgram/inch) respectively are tested on air flow instrument. The highest flow rate is obtained in case of
The correlation coefficient between packing density and porosity of a set of yarn is
Which one is correct regarding pilling resistance?