Friday, 14 September 2018

General Science

1. If a ball is thrown up, which of the following does not change?
A. Acceleration
B. Speed
C. Potential energy
D. Distance

2. What does the slope of a velocity time graph reperesent ?
A. Acceleration
B. Distance
C. Speed
D. momentum

3. Optical fibre works on which of the following principle of light?
A. Reflection
B. Refraction
C. Diffraction
D. Total internal reflection

4. Which instrument is used to measure very high temperatures?
A. Machmeter
B. Photometer
C. Pyknometer
D. Pyrometer

5. The discoverer of penicillin was
A. Lord Lister
B. Alexander F1eming
C. Karl Landsteiner
D. Walter Reed

6. Crescograph was invented by
A. S.N. Bose
B. P.C. Roy
C. J.C. Bose
D. P.C. Mahalanobis

7. Digestion of carbohydrates begins in _______?
A. Small intestine
B. Mouth
C. Buccal cavity
D. Stomach

8. Energy is stored in liver and muscles
in the form of
A. Carbohydrate
B. Fat
C. Protein
D. Glycogen

9. Making of Curd from Milk is because
of:
A. Bacteria
B. Virus
C. Protozoa
D. Other

10. The pH value of the blood in human
body is
A. 6.4
B. 4.8
C. 7.4
D. 8.4

11. Graphite is used in the nuclear reactor as a
A. Fuel
B. Lubricaant
C. moderator
D. None of the above

12. Teflon is the common name of
A. Polytetrafluoro ethylene
B. Polyvinyl chloride
C. Polyvinyl fluoride
D. Dichlorodifluoro methane

13. Rutherford’s alpha-particle scattering experiment was responsible for the discovery of –
A. Atomic Nucleus
B. Electron
C. Proton
D. Neutron

14. Galvanization is a method of protecting iron from rusting by coating with a thin layer of –
A. Gallium
B. Aluminum
C. Zinc
D. Silver

15. Decibel unit is used to measure
A. Light intensity
B. Sound intensity
C. Magnitude of Earthquake
D. None of the above

16. In SONAR, we use:
A. Radio Waves
B. Audible Sound Waves
C. Ultra-Sonic Waves
D. Infra-Sonic Waves

17. According to new definition adopted by ‘International Astronomial Union’ in 2006, which of the following is no a ‘planet’?
A. Uranus
B. Neptune
C. Pluto 
D. Jupiter

18. Which one of the following does not contain silver?
A. Horn silver
B. German silver
C. Ruby silver
D. Lunar caustic

19. Which of the following in measured by ‘Anemometer?
A. Velocity of water-flow
B. Depth of water
C. Force of the wind
D. Intensity of light

20. The image formed by an astronomical telescope is:
A. Virtual and diminished
B. Virtual and magnified
C. Real and diminished
D. Real and magnified

----------------------------------------------Part 2----------------------------------------------------------

1. Who invented the contact lens?
A. Enrico Fermi
B. Adolf Gaston Eugen Fick
C. Sandford Fleming
D. Benoit Fourneyron

2. Blood pressure is measured by _______.
A. Barometer
B. Sphygmomanometer
C. Hydrometer
D. Thermometer

3. Which type of frictional force is exerted between two surfaces in relative motion?
A. Rolling friction
B. Kinetic friction
C. Static friction
D. Limiting friction

4. The first picture of a pinhole camera obscura is a drawn by?
A. Gemma Frisus' De Radio
B. Giambattista della Porta
C. David Brewster
D. Sir William Crookes

5. __________ is the mechanical transfer of energy to a system or from a system by an external force on it.
A. Work
B. Power
C. Intensity
D. Force

6. An n-type and p-type semiconductor can obtained by doping pure silicon with
A. Boron and Phosphorus
B. Indium and Sodiuka
C. Sodium and Magnesium
D. Phosphorus and Boron

7. The unit of which physical quantity is not pascal?
A. Moment of inertia
B. Pressure
C. Stress
D. Young's modulus

8. Which physical quantity is measured in 'siemens'?
A. Electric potential
B. Electrical conductance
C. Magnetic flux
D. Refractive index

9. The behavior of water around 4˙C Temperature is called as ______expansion.
A. Linear
B. Cubical
C. Thermal
D. Anomalous

10. In a projectile motion, the horizontal range achieved is same whether the body is projected at theta and ___________.
A. 180 degree minus theta 180
B. 60 degree minus theta 60
C. 120 degree minus theta
D. 90 degree minus theta

11. Who invented Helicopter?
A. Copernicus
B. Sikorsky
C. Cockrell
D. Drinker

12. Venn diagram was invented by
A. Lucien Vidi
B. John Venn
C. Theophilus Van Kannel
D. Lewis Urry

13. Cadmium pollution is associated with :
A. Minamata disease
B. Black foot disease
C. Dyslexia
D. Itai-itai

14. Device used for the detection and measurement of all types of radiation (alpha, beta and gamma)
A. Geiger counter
B. Polarimeter
C. Calorimeter
D. Radiometer

15. Which law of thermodynamics states that energy can neither be created nordestroyed; energy can only be transferred or changed from one form to another?
A. The zeroth law of thermodynamics
B. The first law of thermodynamics
C. The second law of thermodynamics
D. The third law of thermodynamics

16. How much energy is required by each coulomb of charge passing through a 10 V battery?
A. 1 Joule
B. 12 Joule
C. 10 Joule
D. 5 Joule

17. The poisonous gas accidentally released in Bhopal Gas Tragedy is
A. Methane
B. Nitrous Oxide
C. Methyl Isocyanate
D. Cyanogen

18. For what is Radiocarbon dating technique used?
A. To estimate soil contamination
B. To estimate the amount of water in fossils
C. To estimate the age of fossils
D. To estimate the quality of soil

19. Which among the following is not a characteristic of oxidation reaction?
A. It involves addition of hydrogen
B. It involves addition of oxygen
C. It involves loss of electrons
D. It involves addition of electronegative element

20. Automobile exhaust leads to a poisonous pollutant
A. Carbon Dioxide
B. Sulphur Dioxide
C. Carbon Monoxide
D. Nitrous Oxide

----------------------------------------------Part 3----------------------------------------------------------

1. Pulses are a rich source of which of the following.
A. Carbohydrates
B. Proteins
C. Minerals
D. Vitamin

2. In a projectile motion, the horizontal range achieved is same whether the body is projected at θ0 and _______.
A. 180 Degree- θ Degree
B. 60 Degree- θ Degree
C. 120 Degree- θ Degree
D. 90 Degree- θ Degree


3. Electroscope was invented by
A. Jean-Antoine Nollet
B. Alfred Nobel
C. Joseph Nicephore Niepce
D. Ted Nelson

4. The glowing surface of the Sun is called ___.
A. Photosphere 
B. Chromosphere
C. Corona
D. Troposphere

5. Achras sapota is the scientific name of
A. Custard Apple
B. Gulmohar
C. Tamarind
D. Chiku

6. Farad is a unit of _________.
A. Capacitance
B. Reactance
C. Electric charge
D. Electric conductance

7. Formula for distance is
A. speed x time
B. Time / speed
C. speed x acceleration
D. Velocity / speed

8. Octopus belongs to the phylum
A. Mollusca
B. Cnidaria
C. Echinodermata
D. Chordata

9. Whatis the full form of PVC?
A. Phosphonil vinyl Carbonate
B. Polyvinyl S Carbonate
C. Polyvinyl Carbonate
D. Polyvinyl Chloride

10. Mangroves are plants that have
A. Modified Roots
B. Modified Stems
C. Respiratory Roots
D. Respiratory Stems

11. Rate of change of momentum is
A. Area
B. Pressure
C. Force
D. Velocity

12. Which physical quantity is measured in 'siemens'?
A. Electric potential
B. Electrical conductance
C. Magnetic flux
D. Refractive index

13. Which chemical compound is used in making of dyes?
A. Potassium Bromide
B. Potassium Chloride
C. Potassium Carbonate
D. Potassium Sulphate

14. The phenomenon which causes mirage is
A. Total internal reflection
B. Diffraction
C. Polarisation
D. Interference

15. Which device is used to measure the depth of ocean?
A. Lexometer
B. Nanometer
C. Fathometer
D. Hydrometer

16. Plank’s constant has the dimensions of
A. linear momentum
B. angular momentum
C. force
D. energy

17. Hydraulic brakes in automobiles work on
A. Pascal’s principle
B. Archimedes’ principle
C. Bernouilli’s principle
D. Poiseuille’s principle

18. The basic process taking place in nuclear reactors is
A. Fusion
B. Fission
C. Radioactivity
D. None of the above

19. In Mosely’s periodic table elements are arranged according toA.
A. Increasing atomic number
B. Increasing atomic weight
C. Increasing reactivity
D. Types of element

20. Match the following:
Process - Changes
a. Evaporation - 1. Liquid into gas
b. Sublimation - 2. Liquid into solid
c. Freezing - 3. Solid into gas
d. Melting - 4. Solid into liquid
A. a-1, b-2, c-4, d-3
B. a-1, b-3, c-2, d-4
C. a-2, b-1, c-4, d-3
D. a-2, b-1, c-3, d-4

----------------------------------------------Part 4----------------------------------------------------------

1. Which blood group is universal donor?
A. O+
B. O–
C. AB– 
D. AB+

2. What is the numerical value of the Avogadro constant?
A. 4.8 × 1010 
B. 9.1 × 10-31
C. 6.023 × 10-23
D. 6.023 × 1023

3. Who is known as the father of periodic table?
A. Dmitri Mendeleev
B. Antoine Lavoisier
C. John Newlands
D. Henry Moseley

4. Which of the following pair is INCORRECT?
I. Parsec - Distance
II. Barrel - Liquid
III. Light year - Time
A. Only III
B. Only I and III
C. Only II 
D. All are correct

5. What is the name of the first Super Computer of the world?
A. CDC 6 600
B. USENET
C. COM ODOR VIC/20
D. PARAM-10000

6. On which principle does the hydraulic lift works?
A. Newton's law 
B. Pascal's law
C. Archimedes's law 
D. Joule's law

7. Who is known as the ‘Father of Email’?
A. Larry Page
B. Alan Turing
C. Raymond Tomlinson
D. Elon Musk

8. Write the full form of THAAD?
A. Terminal Hot Altitude Area Defence
B. Terminal High Altitude Area Defence
C. Terminal High Activity Area Defence
D. Terminal Hot Activity Area Defence

9. What is the common name of CaOCl2?
A. Baking Powder 
B. Baking Soda
C. Bleaching Powder 
D. Washing Soda

10. What does ‘B’ stand for in BIOS program which is stored in ROM?
A. Basic 
B. Boot
C. Base 
D. Business

11. By which method, glucose is converted in to alcohol?
A. Fermentation 
B. Oxidation
C. Distillation 
D. Hydrolysis

12. Process of gaining electrons is known as _____.
A. oxidation
B. reduction
C. radiation
D. both oxidation and reduction

13. What happens in an oxidation reaction?
A. Protons are lost.
B. Electrons are lost
C. Neutrons are lost.
D. Electrons are gained.

14. What is Polygraph?
A. Lie dectector
B. Sine wave Graph
C. Graph of ECG
D. A set of graphs

15. Which among the following is not an input device?
A. Plotter
B. Magnetic Ink Character Recognition (MICR)
C. Optical Mark Recognition (OMR)
D. Barcode Reader

16. Who discovered electron?
A. E. Goldstein
B. J. J. Thomson
C. Ernest Rutherford
D. J. Chadwick

17. In MICR, what does 'I' stands for?
A. Interactive 
B. Information
C. Ink 
D. Instruction

18. Minamata disease is a nervous disorder caused by eating fish, polluted with _______.
A. Iron
B. Mercury
C. Lead
D. Nickel

19. What is the scientific name of Giant panda?
A. Ailuropoda Melanoleuca
B. Balaenoptera Musculus
C. Danaus Plexippus
D. Haliaeetus leucocephalus

20. Which of the following is an ore of iron?
A. Dolomite
B. Epsom Salt
C. Siderite
D. Galena

----------------------------------------------Part 5----------------------------------------------------------

1. Optical fibre works on which of the following principle of light?
A. Reflection
B. Refraction
C. Diffraction
D. Total internal reflection

2. What is the SI unit of Young’s modulus of elasticity?
A. Henry
B. Hertz
C. Pascal 
D. Dioptre

3. The matter that supports the sound is called________.
A. Medium 
B. Temperature
C. Density 
D. None of the above

4. The fuse in an electric circuit is connected in
A. parallel to live
B. parallel to neutral
C. series with live
D. series with neutral

5. Electric Motor converts _____ energy to mechanical energy.
A. sound 
B. mechanical
C. chemical
D. electrical

6. Who invented the microscope?
A. Joseph Niepce
B. Blaise Pascal
C. Linus Pauling
D. Zacharias Janssen

7. Which of the following elements has the
lowest melting point?
A. Zinc 
B. Titanium
C. Sulphur 
D. Fluorine

8. Fe has 26 protons in its nucleus. What are the number of electrons in Fe2+ (II) ion?
A. 24 
B. 26
C. 28 
D. 13

9. Which of the following is a radioactive element?
A. Cobalt 
B. Uranium
C. Argon 
D. Chromium

10. Tamarindus indica is the scientific name of __________.
A. Neem 
B. Pineapple
C. Tamarind 
D. Chiku

11. Air has maximum proportion of which inert gas?
A. Carbon Dioxide
B. Nitrous Oxide
C. Argon
D. Carbon Monoxide

12. Which of the gas is not known as greenhouse gas?
A. Methane 
B. Carbon dioxide
C. Nitrous oxide
D. Hydrogen

13. Which of the following are longest cells of human body?
A. Pancreatic cells 
B. Epethelial cells
C. Nerve cells 
D. Epidermal cells

14. Which organ is affected by Pneumonia disease?
A. Skin and intestine 
B. Urinary tract
C. Liver 
D. Lungs

15. Bio-fertilizers convert nitrogen to _____ .
A. nitrates
B. ammonia
C. nitrogenase 
D. amino acids

16. Which one of the following is a carbohydrate?
A. Insulin 
B. Glycine
C. Glucose 
D. Urea

17. Which of the following transports water from the roots of the plant to its leaves?
A. Xylem
B. Phloem
C. Both xylem and phloem
D. Cortex 

18. The function of haemoglobin in the body is
A. Transport of Oxygen
B. Destruction of bacteria
C. Prevention of anemia
D. Utilisation of iron

19. Kidney stones are composed of _______.
A. Calcium Oxalate
B. Sodium Chloride
C. Magnesium Nitrate
D. Calcium Bicarbonate

20. The word CNG in the transport network system stands for
A. Chlorine Natural Gas
B. Commercial Natural Gas
C. Compressed Natural Gas
D. Condensed Natural Gas

----------------------------------------------Part 6----------------------------------------------------------

Q1. The mass on any substance liberated from an electrolyte is directly proportional to the quantity of charge passing through the solution.
(a) Avogadro’s law
(b) Faraday’s first law of electrolysis
(c) Stefan’s law
(d) Kirchhoff’s law of electricity

Q2. The value of Avogadro’s constant is?
(a) 6.022 × 10²³ per mole
(b) 58.04 × 10¯² per mole
(c) 69.51 × 10¯¹⁸ per mole
(d) 6.022 × 10¹⁴ per mole

Q3. Which one of the following is the correct unit of angular velocity?
(a) m/minute
(b) cm/sec²
(c) cm/sec
(d) radians/sec

Q4. The maximum displacement of a vibrating body from its mean position is called?
(a) Gyration
(b) Wavelength
(c) Amplitude
(d) Impulse

Q5. The Kinetic energy of a body depends upon?
(a) Mass, gravity and height
(b) Its mass alone
(c) Its velocity alone
(d) Both mass and velocity

Q6. The term ‘Squirrel cage’ is associated with?
(a) Pressure gauges
(b) Coils
(c) Potentiometers
(d) Induction motors

Q7. A swimmer finds it easier to swim in sea water than in plain water, why?
(a) Sea water has less contamination.
(b) Sea waves help a swimmer to swim.
(c) Sea water has higher density than plain water.
(d) Sea has a much higher volume of water.

Q8. Humidity refers to?
(a) Direction of wind
(b) Temperature of the air.
(c) Moisture content of the air.
(d) Pressure of the air.

Q9. The temperature on the surface of the sun is about?
(a) 8 × 10¹⁵ °C
(b) 500 °C
(c) 6000 °C
(d) 1000°C

Q10. As a train approaches us, the frequency or shrillness of its whistle increases. The phenomenon is explained by?
(a) Big Bang Theory
(b) Doppler effect
(c) Charles law
(d) Archimedes Principle

Q11. The load on a spring per unit deflection is called?
(a) Stress
(b) Flexibility
(c) Stiffness
(d) Strain

Q12. Which one of the following is a major constituent of petrol?
(a) Pentane (C₅H₁₂)
(b) Octane (C₈H₁₈)
(c) Methane (CH₄)
(d) Hexane (C₆H₁₄)

Q13. The sound waves in the audible range have frequencies in the range of?
(a) 20 Hz to 20,000 Hz
(b) 0.5 Hz to 5 Hz
(c) 1 Hz to 10 Hz
(d) 20,000 Hz to 40,000 Hz

Q14. The term EURO-II in the context of modern cars refers to?
(a) Emission from cars
(b) Speed of cars
(c) Fuel efficiency
(d) Torque available

Q15. The chemical formula of ‘Plaster of Paris’ is?
(a) 2 CaSO₄. 2 H₂O
(b) Ca(OH)₂
(c) (CaSO₄). ½ H₂O
(d) CaOCl₂

----------------------------------------------Part 7----------------------------------------------------------

1. What is the value of knee voltage of silicon diode?
1) 0.3 V 2) 0.33 V 3) 0.7 V 4) 1.1 V
Answer: 3

2. There is 20 volt across the inductor and 15 volt across the resistance in the a.c. supplied series
R-L circuit. What would be the supply voltage?
1) 20 volt 2) 15 volt 3) 25 volt 4) 17.5 volt
Answer:3

3. A transformer mainly transforms -------------
1) Current 2) Voltage 3) Frequency 4) Power
Answer:2

4. What is the power factor of a pure resistor circuit?
1) One 2) Zero 3) Leading 4) Lagging
Answer:1

5. Which of the following instruments is most accurate?
1) Vertical caliper 2) Manometric screw gauge 3) Optical projector 4) Mechanical comparator
Answer : 3

6. There are rings around which of the following planets?
1) Uranus 2) mars 3) Jupiter 4) Saturn
Answer:4

7. --------------- is used to heat the non-conductors.
1) Eddy current heating 2) Arc heating 3) Induction heating 4) Dielectric heating
Answer:4

8. What is the S.I. Unit of magnetic flux density?
1) Gauss 2) Tesla 3) Oersted 4) Weber
Answer:2

9. Which type of oscillator is most stable in simple circuit?
1) Crystalline oscillator 2) Clapp oscillator 3) Colpitts oscillator 4) Armstrong oscillator
Answer:1


10. Which of the following metals forms an amalgam with other metals?
1) Mercury 2) Tin 3) Lead 4) Zinc
Answer : 1

11. What is the proper use of signal generator?
1) Designing 2) Testing 3) Repairing 4) All the above
Answer:4

12. If one cylinder of a diesel engine receives more fuel than the others, then for that cylinder the
1) exhaust till be smoky 2) piston rings would stick into piston grooves 3) scavenging occurs 4)
engine starts overheating
Answer:1

13. The information is sent by CW transmitter by1)
Changing the audio frequency 2) Interrupting radio signal 3) Using microphone 4) Using camera
Answer:1

14. Moisture can be removed from lubricating oil using --------------
1) Tubular centrifugal 2) Clarifier 3) Sparkler filter 4) Vacuum leaf filter
Answer:1

15. Germanium possesses1)
Two valence electrons 2) Three valence electrons 3) Four valence electrons 4) Five valence
electrons
Answer:3

16. Which of the following is not a property of difference amplifier?
1) Capacitor is used in it
2) It is used to compare two signals
3) Difference amplifier yields more than the direct couple amplifier
4) Frequency of difference amplifier remains flat from zero to high
Answer:1

17. Calorie value is the least of the following materials
1) Coal gas
2) Producer gas
3) Steam fiery gas
4) Oil gas
Answer:2

18. Natural rubber is polymer of
1) Isobutane
2) Isoprene
3) Propane
4) Isopropene
Answer:2

19. For generating large currents on D.C. generators which winding is generally pre-ferred?
1) Progressive wave winding
2) Lap winding
3) Retrogressive wave winding
4) Current depends on design
Answer:2

20. A.C. servomotor is basically a/ an
1) Universal motor
2) Single phase induction motor
3) Two phase induction motor
4) Three phase induction motor
Answer:3

21. Co-efficient of velocity as compared to the coefficient of discharge is
1)Less
2) More
3) Equal
4) Less or more depending on flow
Answer:2

22. The capacitance, in force current analogy, is analogous to
1) Momentum
2) Velocity
3) Displacement
4) Mass
Answer:4

23..... signal will become zero when the feedback signal and reference signs are equal.
1) Input 2) Actuating 3) Feedback 4) Reference
Answer:2

24. Motor-generator set for D.C. are welding has generator of
1) Series type 2) Shunt type 3) Differentially compound type 4) Level compound type
Answer:3

25. Which of the following motors is preferred when quick speed reversal is the main
consideration?
1) Squirrel cage induction motor
2) Wound rotor induction motor
3) Synchronous motor
4) D.C.motor
Answer:4

26. In case of ball bearings, which part is made harder than others
1) Ball
2) Outer-race
3) Inner race
4) All are made equally hard
Answer:4


27. Selectivity of the receiver can be increased by which of the following?
1) By using more tuned circuit
2) By decreasing number of tuned circuit
3) By using loudspeaker
4) By increasing gain of the receiver
Answer:4

28. An electronics circuits in which different components such as Diode, Resistor and Capacitor etc. are connected separately is called
1) Chassis 2) Printed board 3) Integrated circuit 4) Discrete circuit
Answer:3

29. What are Ferrites?
1) Magnetic but have low resistance
2) Magnetic but have high resistance
3) Non-magnetic with low resistance
4) Non-magnetic with high resistance
Answer : 2

30. The machine translator code line program by line that is called converts -source code in high level language into
1) Assembler 2) Compiler 3) Loader 4) Interpreter
Answer:2

31. Approximate thermal efficiency of petrol engine is
1) 20% 2) 30% 3) 50% 4) 75%
Answer:2

32. How will a red flower appear, if it is seen through a green glass?
1) Red 2) Brown 3) White 4) Green
Answer:2

33. What is the unit of electrical energy?
1) Ampere 2) volt 3) Watt 4) Kilowatt-hour
Answer:4

34. A diode .....?
1) Functions only in one direction
2) Functions in both the directions
3) Does not function at all
4) It gets damaged, when voltage is applied
Answer:1

35. What is the frequency of the receiver?
1) 488 kHz 2) 445 kHz 3) 455 kHz 4) 456 kHz
Answer:4

36 . Protein is not available in which of the following?
1) Meat 2) Milk 3) Rice 4) Pulse
Answer:3

37 . In steam turbine the action of steam is1)
Stable 2) Dynamic 3) Stable and dynamic 4) Neither stable nor dynamic
Answer:2

38 . Among the following statement which is the false?
1) Only minority impurities are added in a junction diode
2) Higher temperature increases the leakage current of diode
3) A simple zener diode works when connected between anode to cathode
4) Zener is mostly used in voltage regulator
Answer:1

39. In resistance heating, highest working temperature is obtained from heating elements made of?
1) Nickel and copper 2) Nichrome 3) Silicon carbide 4) Silver
Answer:2

40. In higher pair, the relative motion is
1) Purely turning 2) Purely sliding 3) Purely rotary 4) Combination of sliding and turning
Answer:4

41. In case of gas turbines, the gaseous fuel consumption guarantees are based on -
1) High heat value 2) Low heat value 3) Net calorific value 4) Middle heat value
Answer : 3

42. An automatic toaster is a ..... loop control system.
1) Open 2) Closed 3) Partially closed 4) None of the above
Answer : 1

43. To convert moving coil galvanometer into an ammeter, which of the following methods is used?
1) Small resistance in series 2) Small resistance in parallel3) High resistance in series 4) High resistance in parallel
Answer : 2

44. When input signal in transistor amplifier is applied between base and emitter and out put is taken from emitter and collector, then what the configuration is called?
1) Common emitter 2) Common base 3) Common collector 4) None of these
Answer : 1

45. Which of the following can be used to control the speed of a D.C. motor?
1) Thermistor 2) Thyristor 3) Thyratron 4) Transistor
Answer : 2

46. The transient response of a system is mainly due to
1) Inertia forces 2) Internal forces 3) Stored energy 4) Friction
Answer : 2

47. Minority carrier in P-type semi-conductor are1)
Free electrons 2) Free holes 3) Holes and electrons both 4) Holes minus electrons
Answer : 2

48. Pulley in a belt drive acts as
1) Cylindrical pair 2) Turning pair 3) Rolling pair 4) Sliding pair
Answer : 1

49 . D.C. shunt relays are made of1)
Few turns of thin wire 2) Few turns of thick wire 3) Many turns of thin wire 4) Many turns of thick wire
Answer : 2

50. Oscillator operates on sub harmonic frequency because
1) Lower frequency gives better stability 2) It gives linear out put 3) Less stages are used 4) More stages are used
Answer : 2

51. Hopkinson's test on D.C. machines is conducted at
1) No-load 2) part load 3) Full-load 4) Over load
Answer : 3

52. Emitter follower is also called as
1) Common emitter 2) Common base 3) Common collector 4) SCR
Answer : 3

53. The example of lower pair is
1) Shaft revolving in a bearing 2) Straight line motion mechanisms 3) Automobile steering gear 4) All of the above
Answer : 2

54. Which is true statement among the following?
1) Main function of the detector is to suppress the image signal
2) Noise is very low in crystal detector
3) Super-regenerative is less sensitive
4) Diode detector is more sensitive
Answer : 4

55. In connection with oscillator, which is FALSE statement?
1) Oscillator converts d.c. into a.c.
2) Oscillator is that amplifier which provides its own input
3) All types of oscillator produce sine wave
4) In phase, feedback used in oscillator is also called positive feedback.
Answer : 3

56. The index of compression n tends to reach ratio of specific heats γ when
1) flow is uniform and steady
2) process is isentropic
3) process is isothermal
4) process is isentropic and specific heat does not change with temperature
Answer : 2

57. For which of the following substances, the internal energy and enthalpy are the functions of temperature only
1) Any gas 2) Saturated steam 3) Water 4) Perfect gas
Answer : 4

58. Frequency multiplier stage of the transmitter operates under
1) Class C 2) Class A 3) Class AB 4) Class B
Answer : 1

59. Which of the following is used in the blast furnace as flux?
1) Fluorspar 2) Quartzite 3) Limestone 4) Ferro-manganese
Answer : 1

60. An air vessel is usually provided at the summit of a syphon in order to1)
Regulate the flow 2) Increase discharge 3) Avoid interruption in flow 4) Increase velocity
Answer : 1

61. An exciter for a turbo generator is a1)
Separately excited generator 2) Shunt generator 3) Series generator 4) Compound generator
Answer : 1











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