Prepare for BHEL Artisan (Electronics Mechanic) recruitment examination with official previous years' solved questions across Basic Electrical & AC Fundamentals, Passive & Active Components, Semiconductor Devices (Diodes, BJTs, MOSFETs), Power Electronics & Converters (SCR, TRIAC), Digital Electronics, Electronic Instruments (CRO, Multimeter), SMPS & Inverters, and Industrial Soldering Standards.
Marking pattern: +1.00 positive, -0.25 negative (Official BHEL Artisan CBT Scheme).
The main principle of operation of a Miniature Circuit Breaker (MCB) is based on
Horizontal and vertical resolution of a TV system primarily depends upon ________ and ________, respectively.
A Type C MCB with a nominal current rating of 20 A will instantaneously trip (within 0.1 seconds) if the fault current falls within which of the following ranges?
What is the output of a NOT gate when the input is 1?
An electrical circuit has 4 nodes, P, Q, R and S, such that 3 resistors of $10\ \Omega$ are placed between P and Q; Q and R; and R and S.
P and R are shorted; Q and S are shorted.
What is the equivalent resistance between nodes P and S?
In relays, a movable piece of metal that is attracted to the electromagnet when it is energised is called a/an
Which filler metal is used exclusively on aluminium-base metals in torch soldering?
Which of the following statements is INCORRECT regarding soldering and brazing?
Two inductors of 15 H and 30 H are connected in parallel. What is the equivalent inductance?
During routine testing of an MCB, the contact resistance is checked using
In an AC circuit, the current through a capacitor
Consider a circuit with a 12 V battery, a $4\ \Omega$ resistor, and a $6\ \Omega$ resistor connected in series. What is the voltage drop across the $6\ \Omega$ resistor according to Kirchhoff's voltage law?
Which component is most suitable to design the direct method of frequency modulation generation?
The neutral oxy-acetylene flame is generally preferred for soldering/brazing because
The efficiency of the transformer is maximum when
Which of the following methods is the most reliable to test an LED?
During the reverse bias of a PN junction, the depletion region width
What is the primary function of a series clipper in an electronic circuit?
While observing the sinusoidal signal on a CRO, if the time per/division, which was originally pointing on 1 msec, is now shifted to 2 msec, then the
Which standard specifies the testing requirements for protective relays?
Why are clips preferred over pins in some cases?
Which pencil grade is best for freehand sketching?
The correct expression for the lateral surface area of a hexagonal bar is:
Which arrowhead type is commonly used in engineering drawings?
Which type of protractors offers the highest accuracy?