RRB JE CBT 2 Electrical & Allied Engineering 2026 – Shift 1 with Answers

An induction furnace operates at 10 kHz and is used to melt 100 kg of steel. If the efficiency is 60% and the energy required to melt steel is 1500 kWh/ton, what is the minimum energy input needed?

The curve obtained in the input characteristics of a BJT in common-emitter (CE) configuration is _______.

A protective device with high rupturing capacity can:

A 12 μF capacitor and a 4 μF capacitor are connected in series. The ratio of voltages across them will be:

What is the purpose of a Buchholz relay in transformer protection?

In a series R-C circuit supplied with sinusoidal AC voltage, the current leads the applied voltage by an angle φ. Which of the following correctly expresses this phase angle?

Which of the following statements about damping in moving-iron instruments is correct?

Which method is commonly used to reduce earth resistance in an electrical installation?

What happens to the magnetic field around a straight current-carrying conductor when the current through it is increased?

How is the phase angle between voltage V and total current I_S in a parallel RLC circuit determined?

Consider the following statements about torque in synchronous motors.
Statement I: The torque in a synchronous motor is produced only when the rotor is locked into synchronism.
Statement II: The torque is directly proportional to the sine of the load angle (δ).
Statement III: Synchronous motor develops starting torque proportional to the power input.
Statement IV: Maximum torque occurs at δ = 180°.
Which of the above statements are correct?

Which Law illustrates the relationship between induced electromotive force (EMF) and the time variation of magnetic flux in a coil?

Which of the following statements about the atomic hydrogen arc welding process is correct?

For accurate measurement of inductors using Hay's bridge, which characteristic should the inductor primarily possess?

In a three-phase induction motor, the phasor diagram shows an angle between the applied stator voltage and the resulting stator current. This angle primarily indicates:

In seam welding, the electrodes are made of _______.

An oscilloscope displays a measured rise time of 10 ns when observing a fast pulse. If the oscilloscope itself has a specified rise time of 6 ns, then what is the approximate actual rise time of the signal being measured?

Which strategy reduces electricity charges under a power factor tariff system for a manufacturing plant with predominantly inductive loads?

Why does a squirrel cage induction motor not develop maximum starting torque?

Which modification in an earthing system most directly reduces earth resistance by improving the contact area between the electrode and surrounding soil?

Which consideration is important while deciding the capacity of a power station?

A machine delivers power that is three times its original value, while the duration of operation stays unchanged. How does the work done by the machine change?

Which statement about magnetic flux is false?

Which point or region represents the Pull-out Torque in the shown torque-speed characteristic of a 3-phase induction motor?

Which set of statements correctly describes the steady state speed-torque characteristics of a three-phase synchronous motor?
(i) Runs at constant synchronous speed
(ii) Starting torque is zero
(iii) Torque increases significantly with slip
(iv) Not suitable for variable speed drives
(v) Maintains speed under varying loads

Identify the correct equation for controlling torque (T_C) in a spring-controlled moving iron instrument, where K is the spring constant and θ is the deflection angle.

In a closed electrical loop supplied by 10 V, two resistors produce voltage drops of 6 V and 4 V, respectively. Which statement correctly expresses Kirchhoff’s Voltage Law for this loop?

A three-phase slip ring induction motor is preferred over a squirrel cage induction motor for which of the following application scenarios?

Which of the following is used to join two cable conductors?