ENGINEERING CAREER AND STUDY MATERIALS

1. For a D.C. generator when the number of poles and the number of armature conductors is fixed, then which winding will give the higher e.m.f. ? a) Lap winding b) Wave winding c) Either of (a) and (b) above d) Depends on other features of design Answer: b) Wave winding 2. The operation of a D.C. machine with large air gap lengths is comparatively a) quiet b) noisy c) either of the above d) none of the above Answer: a) quiet 3. For which of the following applications a D.C. motor is preferred over an A.C. motor ? a) Variable speed operation b) High speed operation c) Low speed operation d) Fixed speed operation Answer: a) Variable speed operation 4. The stator of a D.C. machine comprises of a) main poles 6) interpoles

1. What is the mejority charge carrer of p-type semiconductor ? i)Holes ii)Electrons iii)Protons v)Nuetrons 2. which of the following electrical conductor used in a Battery ? 1 Gas 2 water 3 silver 4 Aluminium. 3. what is the lightning arrester maximum voltage is→_____ a . below 10KV b. 10KV c. 100 kv d. above 100MV 4. The magniture of XL increases by increasing 1. Voltage 2. Current

Consider the following passage and answer the questions that follow accordingly. Humans may have reached northern Europe (including England) 200 000 years earlier than previously thought. Stone tools found in England suggest that early humans were there 700 000 years ago. The stone tools were discovered at a site in Suffolk. The tools have been dated using several methods. Firstly, the magnetic polarity of iron-containing minerals in the sedimentary rocks where the tools were found is aligned north-south, just as it is today. Since the Earth’s magnetic field underwent a polarity reversal 780 000 years ago, the site must be younger than that. The tools were found beneath glacial ice deposits laid down during a period 450 000 years ago when the region was blanketed in ice, so they must be older than this. Also present at the site were fossils of a water vole Mimomys, which was superseded by another vole species called Arvicola around 500 000 years ago. A new amino-acid dating techniqu...

1.  The woman in the cartoon has found the man’s ‘private heartache’ a. confusing. b. intriguing. c. distressing. d. uninteresting. Answer:  d. uninteresting. 2. The woman suggests that, for a first date, the man has a. lacked generosity. b. revealed too much about himself. c. been too reserved. d. chosen an inappropriate venue. Answer:  b. revealed too much about himself.

1. Which of the following metals cannot be produced by aqueous electrolysis? (A) Zinc (B) Copper (C) Gold (D)  Aluminium Answer: (D)  Aluminium 2. The carbon content of low carbon, medium carbon and high carbon steel are respectively. (A) (0-0.1)%; (0.1 – 0.4)% and (0.4 – 1.8)% (B) (0.25-0.4) %; (0.4 – 0.7)% and (0.7 – 1.7)% (C)  Upto 0.25%; (0.25-0.65)% and (0.65 – 1.7)% (D) None of these Answer: (C)  Upto 0.25%; (0.25-0.65)% and (0.65 – 1.7)% 3. Fracture stress for a brittle material having a crack length of 1 µm is 200 MPa. Fracture stress for the same material having a crack length of 4 µm is (A) 200 MPa  (B) 150 MPa (C) 100 MPa (D) 50 MPa

1. The insulation between the commutator systems is- a) Glass (b) Bakelite (c) Mica  (d) Wood Answer: (c) Mica  2.What will be total emf, if 4 cell of 1.5V each are connected in series - a) 3V b) 9 v c) 6V d) 0.375V Answer: c) 6V 3.Winding of armature of motor, the wire used is- a) Copper wire b) fuse wire c) aluminium wire d) super enameled insulated copper wire

Question: Function of Choke in the fluorescent tube circuit is to - (a)Suppress the starting surge (b) Reduce the starting current               (c) Reduce the flickering (d) Initiate the arc and stabilize it Answer:  (d) Initiate the arc and stabilize it

Question: The main function of a Starter is- (a) To limit the rush current at starting (b) to start the counting of time of motor running (c) To developed high starting torque (d) to bring motor quickly to full speed Answer: (a) To limit the rush current at starting

Question: I.E. Rule’s for ___________________ Options; (a) For safety and security  (b) for better power generating (c) both of them   (d) none Answer:  (a) For safety and security 

Question: Value of Power factor lies between_____________________ Options: (a) +1 to -1 (b)+2 to -2 (c) 0 to 1 (d) none of these Answer:  (c) 0 to 1

1. Which of the following motors is used in tape-recorders ? A) Hysteresis motor B) Capacitor-run motor C) Reluctance motor D) Universal motor 2. To generates a 50Hz frequency, the RPM of a generator is must be A. 1500 B. 3000 C. 750 D. no of the above 3. On which rule the d.c motor works? A. Flemings right hand rule B. Fiemings left hand rule C. Both rules D. None 4. diode is on state__________ A. forward bias B. revers bias C. both 1 and 2 D. none 5. The friction losses in Real Transformers are _________? A.0% B.5% C.25% D.50% 6. carbon is an example of ............ ? A. compound B. mixture C. element

Question # 1. Euler’s formula holds good only for (1) Short columns (2) Long columns (3) Both short and long columns (4) Intermediate columns Question # 2. The vehicle used in case of enamel paints is usually (1) Linseed oil (2) Water (3) Varnish (4) None of the above Question # 3. Closed contours of decreasing values towards their centre, represent a (1) Hill (2) Depression (3) Saddle (4) River bed Question # 4. Maximum bulking of sand is likely to occur at a moisture content of (1) 5% (2) 8% (3) 11% (4) 14% Question # 5. The operation of revolving a plane table about its vertical axis so that all lines on the sheet become parallel to corresponding lines on the ground is known as (1) Levelling (2) Centering (3) Orientation (4) Setting Question # 6. Which of the following aggregates gives maximum strength in concrete ? (1) Rounded aggregate (2) Elongated aggregate (3) Flaky aggregate (4) Cubical aggregate Question # 7. Plasticizers and s...

1. In SQL, which of the following is not a DDL command A.RENAME B. GRANT C. REVOKE D. UPDATE 2. A page replacement policy is not necessary for A. Fully associative caches B. Set associative caches C. Directly mapped caches D. Write- through caches 3. Start and Stop bits do not contain any ‘information’ but are used in serial communication for the following A. Error detection B. Synchronization C. Error Correction D. Slowing down the communication 4.  Which of the following features cannot be captured by CFGs A. Syntax of if -then-else statement B. Variable names of arbitrary length C. Whether a variable has been declared before its use D. Syntax of recursive procedures 5. The number of select input lines in a 8- to -1 multiplexer is A.1 B.8 C.256

*1 Which one of the following statements is NOT TRUE for a supersonic flow? A) Over a gradual expansion, entropy remains constant B) Over a sharp expansion corner, entropy can increase C) Over a gradual compression, entropy can remain constant D) Over a sharp compression corner, entropy increases *2 A supersonic airplane is expected to fly at both subsonic and supersonic speeds during its whole flight course. Which one of the following statements is TRUE? (A) Airplane will experience less stability in pitch at supersonic speeds than at subsonic speeds (B) Airplane will feel no change in pitch stability (C) Airplane will experience more stability in pitch at supersonic speeds than at subsonic speeds (D) Pitch stability cannot be inferred from the information given *3 Which one of the following criteria leads to maximum turn rate and minimum radius in a level turn flight? A) Highest possible load factor and highest possible velocity B) Lowest possible load factor and lo...

1.  As the concentration of point defects in a crystal increases, its configurational entropy A) does not change B) decreases C) increases D) initially increases and then decreases 2. Critical value of the Gibbs energy of nucleation at equilibrium temperature is A) zero B) infinite C) positive D) negative 3. With respect to the matrix of Al-Cu alloys, G-P zones are A) coherent B) incoherent C) semi-coherent D) chemically indistinguishable 4. Which one of the following techniques does NOT require quenching to obtain final case hardness? A) Flame hardening B) Induction hardening C) Nitriding D) Carburizing

1.Fire is a combination of a) Fuel, light and Wood, oxygen b) Fuel, heat and carbon dioxide c) Fuel, heat and oxygen d) Fuel, light and nitrogen and Carbon Dioxide e) None of the above Answer:  (c) fuel, heat and oxygen 2. The best way of avoiding accident is by a) Doing work in proper way without PPE b) Doing work in one's own way c) Using safety equipment d) Observing safety rules related to job, machine and workplace  e) None of the above Answer:  d) Observing safety rules related to job, machine and workplace  3. In case of an accident, the victim should immediately be a) Asked to take rest b) Enquired about the accident c) left to himself without treatment d) Attended  e) None of the above Answer:  d) Attended 

* A 1.5mm displacement of tool point in boring operation will result in a change in the diameter equal to? A) 1.65 mm B) 2.5 mm C) 4 mm D) 3 mm Answer: D) 3 mm * The temperature to which a work piece is heated depends on the material and the type of forging process, the temperature range for forging low carbon steel is? A) 700 - 900 Degree Celsius B) 800 - 1300 Degree Celsius C) 450 - 820 Degree Celsius D) 450 - 600 Degree Celsius Answer: B) 800 - 1300 Degree Celsius * Which taper is used on spindle nose of the lathe head stock? A) Morse taper B) Brown and sharp taper C) Thermo Taper D) Yellow Taper Answer: A) Morse taper

* The material with lowest resistivity is A) constantan. B) silver. C) manganin. D) nichrome. Answer*: B) silver. * Phenol and Formaldehyde are polymerised to a resultant product known as (A) PVC. (B). teflon. (C) polyester. (D) bakelite Answer*: (D) bakelite * Dielectric materials are (A) Insulating materials. (B) Semiconducting materials. (C) Magnetic materials. (D) Ferroelectric materials. Answer*: (A) Insulating materials. *The property due to which the resistance of some metal or compound vanishes under certainconditions is (A) Semi conductivity. (B) Super conductivity. (C) Curie point. (D) Magnetostriction. Answer*: (B) Super conductivity. * Thermocouples are used for the measurement of (A) temperature. (B) pressure. (C) Couples (D) density. Answer*: (A) temperature.

1. Which of the following does not change in a transformer ? (a) Frequency (b) Voltage (c) power (d) auto set Answer: (a) Frequency 2. No-load speed of which of the following motor will be highest ? (a) Shunt motor (b) Differentiate compound motor (c) Cumulative compound motor (d) Series motor Answer: (d) Series motor 3. Laminations of core are generally made of (a) Iron (b) silicon steel (c) carbon dioxide (d) stainless steel particle Answer: (b) silicon steel Electrical Engineering questions and answers for competitive exams   4. In a transformer the energy is conveyed from primary to secondary (a) by the flux (b) through air (c) through cooling coil (d) Through the air tub Answer:  (a) by the flux 5.  Which of the following could be lamina-proximately the thickness of laminations of a D.C. machine ? (a) 0.005 mm (b) 0.205 mm (c) 5.5 m (d) 0.5 m Answer:  (d) 0.5 m 6. The direction of rotation of a D.C. seri...

1. Explain USB Port (Universal Serial Bus). Answer: a. Give the specifications of Laser printer.  b. It is a plug and play interface between computers and add on devices. 2. It is a high speed serial bus Answer: a. Buffer size varies from 4MB to 32 MB  b. Speed varies from 4 PPM to 24 PPM.  c. Resolution varies from 600 to 1200 dots per inch.  d. Can print color images. 3. Give the specifications of inkjet printer. Answer: a. Speed varies from 1PPM to 12 PPM  b. Resolution is around 300 dots per inch.  c. Buffer size varies from 1 MB to 4 MB 4. Expand DDR RAM. Answer: Double Data Rate Random Access Memory. 5. Give the specifications of dot matrix printer. Answer: a. Speed varies from 30 to 300 characters per second.  b. Buffer size varies from 1K to 64 K.  c. Print head normally has 9 pins to 24 pins.

1. What is meant by plug and play cards? Answer: It enables the user to add devices to computer. 2. What is the function of control bus? Answer: It carries signals between the units of the computer.  3. What is the function of MAR? Answer: It specifies the address of memory location from which data or instruction is to be accessed  or to which the data is to be stored. 4.Name different I/O ports. Answer: Port is a socket on the back of computer. Different types of ports are serial ports, parallel ports and USB ports. 5. What is program counter? Answer: It keeps track of the memory address of the instruction that is to be executed next.

1. The crankcase scavenging the the crankcase or underside of the piston acts as a. A breather b. A blower c. A ventilator d. An air compressor Answer: d. An air compressor 2. For petrol engines the nominal compression ratio will vary between a. 1 to 2:123 b. 7.5 to 8.5:1 c. 1 to 5:1 d. 18 to 21:12 Answer: b. 7.5 to 8.5:1 3. . Engine torque is highest at a. Low speed b. High speed c. Intermediate speed d. Running Answer: c. Intermediate speed 4. The type of friction generally present in an automotive engine is a. Greasy friction b. Viscous friction c. Dry friction d. Heat Answer: b. Viscous friction

1. The resistance of a 2 km length of cable of cross-sectional area 2mm2 and resistivity of 2×10-8Ω m is: (a) 0.02Ω (b) 2.000Ω (c) 0.02mΩ (d) 20Ω Answer:  (d) 20Ω 2.The thrust developed by a linear induction motor depends on (a) Synchronous speed (b) Rotor input (c) Number of poles (d) Both A and B Answer:  (d) Both A and B 3. What is the “power factor”? a) Cos of the phase angle between true power and apparent power b) Peak power times 0.707 c) Sin of the phase difference between E and I d) Ratio of true power to apparent power Answer:  d) Ratio of true power to apparent power 4.  In Bipolar Junction transistors, the type of configuration which will give both voltage gain and current gain is a) CC b) CB c) CE d) None Answer: c) CE 5. A network designed to pass signals with all frequencies except those between two specified cut-off frequencies is called a (a) low-pass filter

ELECTRICAL ENGINEERING EXAM QUESTIONS FREE DOWNLOAD   The Electrical Engineering Questions repeated in many Recruitment Examinations conducted in Karnataka, Gujarath, Tamil Nadu and Delhi. Referring these questions may help you to gain more knowledge and also helps you to ease the upcoming examination conducted for recruiting Electrical Engineering in Government and Private institutions. 1. A high-pass T-connected symmetrical filter section has capacitance of 400 nF in each of its series arms and an inductance of 200mH in its shunt arm. The cut-off frequency of the filter is (a) 398 Hz (b) 1125 Hz (c) 251 Hz (d) 152 Hz Answer:  (a) 398 Hz 2. A low-pass T-connected symmetrical filter section is comprised of (a) 98.65 μH in each series arm, 121.4 pF in shunt arm (b) 49.34 μH in each series arm, 126.4 pF in shunt arm (c) 98.68 μH in each series arm, 256.7 pF in shunt arm (d) 49.34 μH in each series arm, 256.7 pF in shunt arm Answer;  (d) 49.34 μH in each seri...