Tancet B.E. Basic Engineering

1

Model Question Paper

Basic Engineering and Sciences
The material in which spontaneous polarization changes with temperature is known as (1) Piezo electric (2) Ferro electric (3) Pyro electric (4) Magneto optic Where K and s are thermal and electrical conductivities in a solid, according to Wiedemann­ Franz law

1.

The theorem used for equilibrium of concurrent 8. coplanar forces is (1) Varignon’s Theorem (2) Lame’s Theorem (3) Parallel Axis Theorem 9. (4) Perpendicular Axis Theorem

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3.

Tangential acceleration of the body moving with constant velocity on a curve is equal to KT K s (1) = constant (2) = constant 2 s (1) zero (2) V /R T 2 (3) R/V (4) V/t K s (3) = constant (4) = constant s T where KT 10. The dielectric constant of the commonly used ceramics R = Radius of the curve varies between T = time taken to turn on a curve (1) 1 and 3 (2) 4 and 10 The path traced by the particle which thrown at an (3) 11 and 16 (4) 16 and 25 angle ‘ q ’ with respect to horizontal is 11. The Reynolds number for a 25 mm diameter sphere (1) straight line (2) parabola moving with velocity of 3 m/s through an oil of specific (3) triangle (4) ellipse gravity 0.90 and m = 0.1 Pa.s. is Frictional force depends on the (1) 675 (3) 66220 (2) 6622 (4) 0.675

4.

5.

(1) type of two surfaces in contact and normal reaction 12. The maximum velocity divided by the average velocity (2) material strength of the surfaces in contact in laminar Poisseuille flow between two parallel plates is (3) area of contact of the two surfaces (1) 2 (2) 1.5 (4) fracture toughness of the two materials in contact (3) 1.25 (4) 0.8 How the area moment of inertia of the beam of 13. Boundary layer separation is caused by rectangular cross­section can be increased? (1) Reduction of pressure in the flow direction (1) Depth of the beam is greater than the width of (2) Presence of adverse pressure gradient the beam cross­section (3) Presence of favourable pressure gradient (2) Depth of the beam is equal to width of the (4) Reduction of boundary layer thickness beam cross­ section (3) Depth of the beam is less than the width of beam cross­section (4) Cannot be increased 14. Principle of jet propulsion is utilized in (1) Car (2) Pump (3) Satellite (4) Ship

6.

A mode of fracture that is attended by extensive plastic 15. Specific speed Ns of a turbine is given by deformation is called (1) NP1 2 H 5 4 (2) NP1 3 H 5 4 (1) brittle fracture (2) ductile fracture (3) plastic fracture (4) fatigue fracture
1 1 (3) ( NP ) 2 H 5 4 (4) ( NP ) 3 H 5 4 where N ­ is speed of turbine in rpm P ­ Power developed by turbine H ­ Head of water under which the turbine is working

7.

The dimension of ferromagnetic domains is in the order of (1) 106m (2) 10–9m (3) 10–6m (4) 10–3m

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2 16. The allowable BOD limit for the sewage irrigation as per the BIS is (1) £ 100 mg L (3) £ 500 mg L (2) £ 20 mg L (4) £ 1000 mg L 24. Zeroth law of thermodynamics postulate (1) Thermodynamic equilibrium (2) Heat equilibrium (3) Temperature equilibrium (4) Thermal equilibrium 25. In steady flow energy equation the state of the energy at each point in the control volume vary with the time requires (1) (3)
30W 30W 30W dm . c v = 0 dt dm = 0 dT

17. Ohm’s Law is applicable to (1) Silicon carbide (2) Zener diode (3) Voltage regulator tubes (4) Copper 18. R equivalent of the following circuit is

(2) (4)

dE . c v = 0 dt dE = 0 dT

26. In a nozzle flow in thermodynamics (1) M = 0 (2) W = 0 (3) E = 0 (4) V = 0 27. Clausius in­equality is applicable for (1) Heat engines (2) Heat generators (3) Refrigerators (4) Cooling towers 28. Convert 0.9375 to binary (1) 0.0111 (3) 0.1111 29. (2) 0.1011 (4) none

R equivalent (1) 10W (3) 90W (2) 30W (4) 0W

19. A wire of length L is having resistance R. If it is stretched to n times it’s original length, the resistance of stretched wire is (1) R (2) nR n 20. Bridge that is used for two resistance measurement is (1) Wheatstone bridge(2) Kelvin’s double bridge (3) Maxwell’s bridge (4) Anderson’s bridge 21. In a transformer on no load, the input voltage (1) Leads the magnetizing current by 90° (2) Lags the magnetizing current by 90° (3) Is in phase with the magnetizing current (4) Is always at 45° to the magnetizing current 22. If the dimensions of all the parts of a synchronous generator, and the number of field and armature turns are doubled, then the generated voltage will change by a factor of (1) 1 (2) 2 (3) 4 (4) 8 23. The constant volume specific heat is given by æ ¶h ö (1) ç ¶T ÷ è ø =c v æ ¶E ö (3) ç ¶T ÷ è ø =c v æ ¶u ö (2) ç ¶T ÷ è ø =c v æ ¶S ö (4) ç ¶T ÷ è ø =c v

(3)

R
2

(4) n 2 R

(1a00*10b ) 1010 = 100
(1) a = 0, b = 0 (3) a = 1, b = 0 (2) a = 0, b = 1 (4) a = 1, b = 1

30. Find the output for the following C program ( ) { char*p1=”Name”; char*p2; p2=(char*)malloc(20); while(*p2++=*p1++); printf(“%s\n”,p2); } (1) Empty String (2) Name (3) Name \ (4) Error 31. Find the output for the following C program main ( ) { int x=5; printf(“%d %d %d\n”, x, x2); } (1) 5 20 1 (2) 5 10 2 (3) 5 20 5 (4) 5 10 1

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3 32. From the following four choices, find the odd man out (1) INTEL (2) MOTOROLA (3)NEC (4) IBM 33. From the following four choices, find the odd man out with reference to computer terminology (1) ROM (2) PROM (3) EPROM (4) EEPROM 34. If the lattice constants a, b, c are such that a = b ¹ c , , and the angles between them a = b = 90° g = 120° then the crystal structure is (1) Hexagonal (2) Tetragonal (3) Trigonal (4) Triclinic 35. In radiography x–rays are used because x–rays (1) get diffracted inside the object through which it penetrates (2) are differentially absorbed by the inhomogenity of the material through which it passes. (3) produce heat effect (4) are harmless radiation 36. In a double slit interference experiment when the distance between the slits is made three folds, the fringe width becomes 1 (1) folds (2) 3 folds 3 1 (3) 9 folds (4) folds 9 37. The idea of the quantum nature of light is required to explain (1) interference of light (2) thermionic emission (3) Radioactivity (4) Blackbody radiation 38. The wavelength of emission from He­Ne laser is 41. The increasing order of adsorption power of adsorbants is given by (1) alumina > silica gel > magnesia > calcium carbonate (2) calcium carbonate > magnesia > silica get > alumina (3) magnesia > calcium carbonate > alumina > silica gel (4) silica gel > magnesia > calcium carbonate > alumina 42. Which of the following statements is true? i. For a first order reaction the half time is directly proportional to the rate constant ii. In a zero order reaction the rate does not change with time iii. Molecularity is always a whole number and it cannot be zero (1) i and ii (2) i and iii (3) ii and iii (4) i, ii and iii 43. Which of the following relations are wrong? i. The specific conductance is given by the relation k =
1 ( l A ) R

ii. The equivalent conductance is given
100K by the relation l = C

iii. The specific resistance is given by the relation r = (1) i and ii (3) ii and iii
Rl A

(2) i and iii (4) ii only

m (1) 10.64 m

(2) 337.1 nm

44. The regions of electromagnetic spectrum given in terms of wave length for Microwave, Visible and Mid. IR spectroscopy are given respectively by (1) 1–100 mm, 2.5 – 50 m m and 380 –780 nm (2) 2.5–50 m m , 1–100 mm and 380–780 nm (3) 380–780 nm, 2.5 – 50 m m and 1–100 mm (4) 1–100 mm, 380–780 nm and 2.5 –50 m m 45. The increase in order of carbon content of the different types of coal is given by (1) Peat