ENGINEERING CAREER AND STUDY MATERIALS

Question No. 1. In a stepper motor the angular displacement (A) it cannot be used for positioning of work tables and tools in NC machines. (B) it cannot be readily interfaced with micro computer based controller. (C) the angular displacement cannot be precisely controlled. (D) can be precisely controlled. Answer: (D) can be precisely controlled. Question No. 2. A control system working under unknown random actions is called (a) computer control system (b) digital data system (c) stochastic control system (d) adaptive control system Answer: Question No. 3. An ammeter is a (a) recording instrument (b) absolute instrument (c) secondary instrument (d) integrating instrument Answer: (c) secondary instrument Question No. 4 Out of the following methods of heating the one which is independent of supply frequency is (A) electric arc heating (B) induction heating (C) electric resistance heating (D) dielectric heating  Answer: (C) electric resistance heating

Basic Electrical Engineering Questions and Answers Multiple Choice Basic Electrical Engineering Question Answers are listed below, these are useful for Electrical Engineering staff Recruitment Exams Question No. 1. A potentiometer may be used for (a) measurement of resistance (b) measurement of current (c) calibration of ammeter (d) calibration of voltmeter (e) all of the above Answer: (e) all of the above Question No. 2. A dc shunt generator has a speed of 800 rpm when delivering 20 A to the load at the terminal voltage of 220V. If the same machine is run as a motor it takes a line current of 20A from 220V supply. The speed of the machine as a motor will be (A) 800 rpm. (B) more than 1000 rpm. (C) less than 800 rpm. (D) both higher or lower than 800 rpm. Answer: (C) less than 800 rpm. Question No. 3. In order to reduce the harmonics in the emf generated in an alternator (A) slots are skewed (B) salient pole tips are chamfered (C) winding is well distributed (D)

GATE Electrical Engineering Question & Answer Key The GATE Electrical Engineering Exam Questions with answers published for the use of candidates who are appearing upcoming Examinations   Question No. 1. The d.c. series motor should always be started with load because (A) at no load, it will rotate at dangerously high speed. (B) it will fail to start. (C) it will not develop high starting torque. (D) all are true.  Ans: A Question No. 2. The armature of a dc machine is laminated to reduce: (A) Eddy current loss (B) Hysteresis loss (C) copper losses (D) friction and windage losses  Ans: A Question No. 3. The frequency of the rotor current in a 3 phase 50 Hz, 4 pole induction motor at full load speed is about (A) 50 Hz. (B) 20 Hz. (C) 2 Hz. (D) Zero.  Ans: C Question No. 4. If a single phase alternator has 8 slots per pole uniformly speed, but the winding is arranged with the middle two left empty, the breadth coefficient will be (A) 0.53. (B) 0.88 (C) 0.67 (D

Q.#1. The resistance of armature winding depends on (a) length of conductor (b) cross-sectional area of the conductor (c) number of conductors (d) all of the above Ans: (d) all of the above Q.#2. A commutator in a d.c. machine  (A) Converts the induced a.c armature voltage into direct voltage.  (B) Reduces power loss in field circuit.  (C) Reduces power loss in armature.  (D) Is not necessary. Ans:  (A) Converts the induced a.c armature voltage into direct voltage. Q.#3. In D.C. generators, the cause of rapid brush wear may be (a) severe sparking (b) any of the above (c) imperfect contact (d) rough commutator surface Ans: (b) any of the above Q.#4. The introduction of interpoles in between the main pole improves the performance of d.c. machines, because (A) A counter e.m.f. is induced in the coil undergoing commutation. (B) The flux waveform is improved with reduction in harmonics. (C) The inequality of air flux on the top and bottom halves of armatur

1. D.C. generator generally preferred for charging automobile batteries is (a) series generator (b) shunt generator (c) long shunt compound generator (d) any of'the above Ans: c 2. No-load current in a transformer (a) lags behind the voltage by about 75° (b) leads the voltage by about 75° (c) lags behind the voltage by about 15° (d) leads the voltage by about 15° Ans: a 3. Primary winding of a transformer (a) is always a low voltage winding (b) is always a high voltage winding (c) could either be a low voltage or high voltage winding (d) none of the above Ans: c 4. Power transformers are designed to have maximum efficiency at (a) nearly full load (b) 70% full load (c) 50% full load (d) no load Ans: a 5. In a transformer the tappings are generally provided on (a) primary side (b) secondary side (c) low voltage side (d) high voltage side Ans: c 6. Transmission voltage of llkV is normally used for distances upto (a) 20—25 km (b) 40—50 km (c)

Question No. 1. Electric resistance seam welding uses __________ electrodes.  (A) Pointed (B) Disc.  (C) Flat (D) Domed Ans: B Question No. 2. Spring constant in force-voltage analogy is analogous to (a) capacitance (b) reciprocal of capacitance (c) current (d) resistance Ans: b Question No. 3. The frequency and time domain are related through which of the following? (a) Laplace Transform and Fourier Integral (b) Laplace Transform (c) Fourier Integral (d) Either (b) or (c) Ans: a Question No. 4. When the initial conditions of a system are specified to be zero it implies that the system is (a) at rest without any energy stored in it (b) working normally with reference input (c) working normally with zero reference input (d) at rest but stores energy Ans: d Question No. 5. The power of a n-phase circuit can be measured by using a minimum of (a) (n - 1) wattmeter elements (b) n wattmeter elements (c) (n + 1) wattmeter elements (d) 2n wattmeter eleme

Junior Engineer (Electrical) - AIIMS Jodhpur Model Question Answer Electrical Engineers Recruitment Examination conducted by AIIMS Jodhppur, the previous question papers published in our websites and the model questions answers are listed below Q. No. 1. Various adjustments in an energy meter include (a) light load or friction (b) lag and creep (c) overload and voltage compensation (d) temperature compensation (e) all of the above Answer: (e) all of the above Q. No. 2. The line trap unit employed in carrier current relaying: (A) offers high impedance to 50 Hz power frequency signal (B) offers high impedance to carrier frequency signal (C) offers low impedance to carrier frequency signal (D) Both (A) & (C) Answer: (B) offers high impedance to carrier frequency signal Junior Engineer (Electrical) - AIIMS Jodhpur Model Question Answer   Q. No. 3.Most sensitive galvanometer is (a) elastic galvanometer (b) spot ballistic galvanometer (c) Duddlb galvanometer (d) vib

Question No.1. A d.c. shunt motor runs at no load speed of 1140 r.p.m. At full load, armature reaction weakens the main flux by 5% whereas the armature circuit voltage drops by 10%. The motor full load speed in r.p.m. is (A) 1200 (B) 1203 (C) 1000 (D) 1080 Answer: (D) 1080 Question No.2 The voltage at the two ends of a transmission line are 132 KV and its reactance is 40 ohm. The Capacity of the line is (A) 251.5 MW (B) 217.8 MW (C) 435.6 MW (D) 500 MW Answer: (C) 435.6 MW Question No.3. The gravity controlled instrument has crowded scale because current is proportional to (A) balancing weight (B) deflection angle (C) sine of deflection angle (D) Location of CT Ans: (C) sine of deflection angle Question No.4. For LV applications (below 1 kV), ______________ cables are used. (A) Paper insulated. (B) Single core cables. (C)Plastic. (D) Oil filled. Answer: B) Single core cables. Question No.5. The eddy current loss in an a-c electric motor is 100 watts

Electrical Engineering Questions with Answer 2017 Question # 1. The drive motor used in a mixer-grinder is a (A) universal motor. (B) induction motor. (C) synchronous motor. (D) dc motor. Ans: (A) universal motor. Question # 2. The direction of rotation of hysteresis motor is reversed by  (A) Reversing supply lead  (B) Shift shaded pole with respect to main pole  (C) Either A or B  (D) Neither A nor B Ans: (B) Shift shaded pole with respect to main pole Question # 3. Alternating current is measured by (A) induction ammeter (B) permanent magnet type ammeter (C) electrostatic ammeter (D) moving iron repulsion type voltmeter Ans: (A) induction ammeter Question # 4. A 3-phase, 400 votts, 50 Hz, 100 KW, 4 pole squirrel cage induction motor with a rated slip of 2% will have a rotor speed of (A) 1500 rpm (B) 1570 rpm (C) 1530 rpm (D) 1470 rpm Ans: (D) 1470 rpm Question # 5. The torque, in a _____________is proportional to the square of the armature current (

1. Which of the following is not a vector ? (a) Linear momentum (b) Electric potential (c) Electric field (d) Angular momentum Answer: (d) Angular momentum 2. The efficiency of a machine should be as ______ as possible to reduce the operating cost. (a) high (b) low (c) either of the above (d) none of the above Answer:(a) high 3. The force between two charges is 120 N. If the distance between the charges is doubled, the force will be (a) 60 N (b) 40 N

Question# 1. A sensitive galvanometer produces large deflection for a (a) large value of power (b) large value of current (c) small value of current (d) large value of voitage (e) none of the above Answer: (c) small value of current Question# 2. Mass, in force-voltage analogy, is analogous to (a) charge (b) current (c) resistance (d) inductance Answer: (d) inductance Question# 3. To measure radio frequency, the suitable frequency meter is (a) hetrodyne frequency meter (b) reed vibrator frequency meter (c) Weston frequency meter (d) electrical resonance frequency meter Answer: (a) hetrodyne frequency meter Question# 4. Which of the following can be measured by the use of a tacho-generator ? (a) Acceleration (b) Speed (c) Speed and acceleration (d) Displacement Answer: (b) Speed Question# 5. The power of a n-phase circuit can be measured by using a minimum of (a) (n - 1) wattmeter elements (b) n wattmeter elements (c) (n + 1) wattmeter elements (d

Question #1. If the gain of the critical damped system is increased it will behave as (a) oscillatory (b) critically damped (c) overdamped (d) underdamped (e) none of the above Answer: (d) underdamped Question #2. technique gives quick transient and stability response (a) Root locus (b) Bode (c) Nyquist (d) Nichols Answer: (a) Root locus Question #3. On which of the following factors does the sensitivity of a closed loop system to gain changes and load disturbances depend ? (a) Frequency (b) Loop gain (c) Forward gain (d) All of the above Answer: (d) All of the above Question #4. Phase margin of a system is used to specify which of the following ? (a) Relative stability (b) Absolute stability (c) Frequency response

1. The process known as signal compression is used with a(n) ____ amplifier. A) log B ) instrumentation C)  Antilog D) isolation Answer:  B ) instrumentation 2. An automatic toaster is a ______ loop control system. A) open B) closed C) partially closed D) any of the above Answer: A) open 3. Instrumentation amplifiers are normally used to measure A) small differential signal voltages B) signals superimposed on a common-mode voltage often much larger than the signal voltage C) both of the above D) none of the above Answer:  A) small differential signal voltages 4. What is the function of a ladder network? A)Changing a digital signal to an analog B) Changing a linear signal to a digital C)   Changing an analog signal to a digital D) None of the above Answer:  A)Changing a digital signal to an analog 5. Which of the following devices are commonly used as error detectors in instruments ? A) Vernistats B) Microsyns C) Resolvers D) Any of the above Ans

Question #1:-Which among the following substance is most elastic ?  A:-Steel  B:-Rubber  C:-Brass  D:-Aluminium  Correct Answer:- Option-A Question #2. Any externally introduced signal affecting the controlled output is called a (a) feedback (b) stimulus (c) signal (d) gain control  Correct Answer:-: Option B Published @  http://engineering-questions.blogspot.com Question #3:-An increase in load at the free end of a cantilever is likely to cause failure  A:-At fixed support end  B:-Free end  C:-Mid of its length  D:-Any where  Correct Answer:-Answer:- Option-A Question #4. A.C. servomotor resembles (a) two phase induction motor (b) Three phase induction motor (c) direct current series motor (d) universal motor  Correct Answer:- Option-A Question #5:-Electronic components are usually joined by  A:-Brazing  B:-Sintering  C:-Soldering  D:-Welding  Correct Answer:- Option-C Question #6. The band width, in a feedback amplifier. (a) remains unaffected

1. Strain type insulator arc used where the conductors arc (A) dead ended (B) at intermediate anchor towers (C) any of the above (D) none of the above. 2. Conductors for high voltage transmission lines are suspended from towers (A) to reduce clearance from ground (B) to increase clearance from ground (C) to reduce wind and snow loads (D) to take care of extension in length during summer.  3. Boosters are basically (A) inductors (B) capacitors (C) transformers (D) synchronous motors.  4. Which of the following is not the distribution system normally used (A) 3 phase-4 wire (B) 3 phase-3 wire (C) Single phase - 3 wire (D) Single phase -4 wire.  5. Skin effect results in (A) reduced effective resistance but increased effective internal reactance of the conductor (B) increased effective resistance but reduced effective internal reactance of. the conductor (C) reduced effective resistance as well as effective internal reactance (D) increased effective resista

1. The transfer function technique is considered as inadequate under which of the following conditions ? (a) Systems having complexities and non-linearities (b) Systems having stability problems (c) Systems having multiple input dis¬turbances (d) All of the above Answer:(d) All of the above 2. In order to increase the damping of a badly underdamped system which of followincompensators may be used ? (a) Phase-lag (b) Phase-lead (c) Both (a) and (b) (d) Either (a) and (b) Answer: (b) Phase-lead 3. Which of the following is the best method for determining the stability and transient response ? (a) Nyquist plot (b) Bode plot (c) Root locus (d) None of the above Answer: (c) Root locus 4. The type 2 system has at the origin. (a) no net pole (b) net pole (c) simple pole (d) two poles Answer: (d) two poles 5. In a system low friction co-efficient facilitates (a) increased speed of response (b) increased velocity lag error (c) reduced velocity lag error (d) re

1. A car is running at a constant speed of 50 km/h, which of the following is the feedback element for the driver ? (a) Clutch (b) Eyes (c) Needle of the speedometer (d) Steering wheel (e) None of the above Ans: c 2. Which of the following is exhibited by Root locus diagrams ? (a) The poles of the transfer function for a set of parameter values (b) The bandwidth of the system (c) The response of a system to a step input (d) The frequency response of a system (e) None of the above Ans: a 3. With feed back _____ reduces. (a) system stability (6) system gain

1. A constant-current source delivers a load current that A) remains constant when the load resistance changes  B) varies with load resistance C) varies inversely with load resistance D) varies inversely with input voltage Answer:  D) varies inversely with input voltage 2. The voltage gain of a basic instrumentation amplifier is set by a(n) A) diode.  B) capacitor C) resistor   D) inductor Answer: C) resistor   3. What is (are) the level(s) of the input voltage to a ladder-network conversion? A) 0  B) Vref C) 0 V or Vref  D) None of the above Answer: A) 0  4. Circuits that shift the dc level of a signal are called A) limiters  B) clampers

Question 1:-The standard BOD of water is taken for  A:-5 days at 20°C  B:-3 days at 20°C  C:-5 days at 27°C  D:-2 days at 27°C  Correct Answer:-  A:-5 days at 20°C Question 2:-An imaging line joining the points of equal elevation on the surface of the earth is called  A:-Contour gradient  B:-Level line  C:-Contour surface  D:-Contour line  Correct Answer:-  D:-Contour line Question 3:-The main advantage of crystal oscillator is  A:-High efficiency  B:-High output voltage  C:-High frequency stability Electrical Engineering questions and answers for competitive exams Electrical Engineering Questions Electrical engineering Question Answers Electrical Engineering Question Answers- Nov 2018 Electrical Engineering Question Answers Electrical Engineering Question Answers  D:-High gain  Correct Answer:-  C:-High frequency stability Question 4:-When the collector voltage in a NPN transistor increases, the effective base width decreases. This phenomenon is called  A:-Schot

1. The forced oil and air circulation method is usual one for transformers of capacities (a) upto 5 MVA (b) upto 10 MVA (c) upto 20 MVA (d) 30 MVA upwards Answer: (d) 30 MVA upwards 2. Yokes with rectangular cross-section are used for (a) small capacity transformers (b) medium capacity transformers (c) large capacity transformers (d) any of the above Answer: (a) small capacity transformers 3. The ratio of maximum displacement deviation to full scale deviation of the instrument is called (a) static sensitivity (b) dynamic deviation (c) linearity