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 Also present at the site were fossils of a water vole Mimomys, which was superseded by another vole species called Arvicola around 500 000 years ago.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