16 . The affected parameter by shunt capacitance are -
  • A. real power
  • B. reactive power
  • C. frequency
  • D. all of these
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17 . The applied voltage of a certain transformer is increased by 50%, while the frequency is reduced by 50%. The maximum core flux density will
  • A. become three times
  • B. become 1.5 times
  • C. become half
  • D. remian the same
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18 . The emf generated in a dc generator is directly proportional to
  • A. Flux per pole
  • B. No, of oples
  • C. Spped of armature
  • D. all above
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19 . The radiant energy of the Sun results from—   
  • A. Nuclear fusion
  • B. Nuclear fission
  • C. Cosmic radiation
  • D. Combustion
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20 . The speed of a DC shunt motor is required to be more than full load speed . This is possible by-
  • A. reducing the field current
  • B. decreasing the armature current
  • C. increasing the armature current
  • D. None of the above
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21 . When sunlight passes through tiny suspended rain drops it produces—
  • A. Rainbow
  • B. White light
  • C. Ultraviolet ray
  • D. None
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22 . Which of the following statement holds true for the divergence of electric and magnetic flux dendities?
  • A. Both are zero
  • B. These are zero for static flux dendities but non-zero for time -varying flux dendities
  • C. It is zero for electric flux densities
  • D. It is zero for magnetic flux densities
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23 . Which one is not the symptom of a disease caused by Ebola virus?  
  • A. High blood pressure
  • B. Headache
  • C. High fever
  • D. Stomach pain
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24 . which one of the following ecosystems covers the largest area of the earth's surface?
  • A. Desert Ecosystem
  • B. Mountain Ecosystem
  • C. Fresh water Ecosystem
  • D. Marine Ecosystem
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25 .  At the rate of m meters per s seconds, how many meters does a cyclist travel in x minutes?
  • A. m/sx
  • B. mx/s
  • C. 60m/sx
  • D. 60ms/x
  • E. 60mx/s
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26 .  Which one is different?  
  • A. Penicillin
  • B. SARS
  • C. HIV
  • D. Ebola
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27 . A 60 year old gentleman has been diagnosed as vitamin B12 deficiency due to pernicious anemia . which o the following is unlikely to happen?
  • A. Posterioor column involvement
  • B. Optic atrophy
  • C. Corticospina tract involvement
  • D. Seizure
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৩৯ তম (বিশেষ) বিসিএস প্রিলিমিনারি টেস্ট (স্বাস্থ্য ক্যাডার) (03-08-2018)
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28 . A babyis called preterm when born before__
  • A. 40 Weeks of pregnancy
  • B. 37 Weeks of pregnancy
  • C. 32 Weeks of pregnancy
  • D. 28 Weeks of pregnancy
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29 . A beam supporting a uniformly distributed load over its entire length L is pinned at one end and passes over a roller support at a distance x from the other end . The value of x such that the greatest bending moment in the beam is as small as possible, will be
  • A. 0.293L
  • B. 0.125L
  • C. 0.111L
  • D. 0.330L
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30 . A cantilever beam of length L carries a gradually varying load form zero at free and w per unit length at the fixed end. The maximum deflection lies at
  • A. free end
  • B. fixed end
  • C. L/3 sloping side
  • D. none of these
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