INDUSTRIAL APPLICATIONS OF ELECTRIC MOTORS

Objective Questions Short notes Objective questions (Answers are given below) A steel mill requires a motor having highstarting torque, wide speed range and precisespeed control. Which one of the followingmotors will you choose ?(a) d.c. shunt motor(b) synchronous motor(c) d.c. series motor(d) slip-ring induction motor. Heavy-duty steel-works cranes which havewide load variations are equipped with…………….. … Read more

ELECTRONICS INSTRUMENTS

Objective Questions Short notes Objective questions (Answers are given below) Digital instruments are those which(a) have numerical readout(b) use LED or LCD displays(c) have a circuitry of digital design(d) use deflectioin type meter movement. The main difference between the electronic andelectrical instruments is that an electronic instrumentcontains(a) an electronic device (b) a transducer(c) a digital … Read more

MCQ ON LOGIC GATES

LOGIC GATES MCQ Objective Questions Short notes Objective questions (Answers are given below) A logic gate is an electronic circuit which(a) makes logic decision(b) allows electron flow only in one direction(c) works on binary algebra(d) alternates between 0 and 1 values. In positive logic, logic state 1 corresponds to(a) positive voltage(b) higher voltage level(c) zero … Read more

INTEGRATED CIRCUITS

Objective Questions Short notes Objective questions (Answers are given below) First integrated circuit chip was developed by(a) C.V. Raman(b) W.H. Brattain(c) J.S. Kilby(d) Robert Noyce. An integrated electronic circuit is(a) a complicated circuit(b) an integrating device(c) much costlier than a single transistor(d) fabricated on a tiny silicon chip. Most important advantage of an IC is … Read more

ELECTRIC WELDING

Objective Questions Short notes Objective questions (Answers are given below) The basic electrical requirement in arc weldingis that there should be(a) coated electrodes(b) high open-circuit voltage(c) no arc blow(d) d.c. power supply. Welding is not done directly from thesupply mains because(a) it is customary to use welding machines(b) its voltage is too high(c) its voltage … Read more