91 . Function of distribution sub-station is to:
  • A. step-down voltage
  • B. step-up voltage,
  • C. increase power,
  • D. increase engery
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পল্লী বিদ্যুতায়ন বোর্ড। এসিস্ট্যান্ট এনফোর্সমেন্ট কোঅডিনেটর। 31-12-2021
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92 . Half life of Uranium-238 is-
  • A. 4510000000 years
  • B. 82000 years
  • C. 269000 years
  • D. None of these
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93 . Heparin is :
  • A. Secreted by goblet cell
  • B. Found in the bone marrow
  • C. A natural articoagulant
  • D. An enzyme
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৩৯ তম (বিশেষ) বিসিএস প্রিলিমিনারি টেস্ট (স্বাস্থ্য ক্যাডার) (03-08-2018)
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94 . Highest amount in volcanic gas is
  • A. CO2
  • B. H2S
  • C. H2O
  • D. SO2
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95 . Histamin causes:
  • A. Vasodilatation
  • B. Bradycardia
  • C. Hypertension
  • D. Vasoconstriction
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৩৯ তম (বিশেষ) বিসিএস প্রিলিমিনারি টেস্ট (স্বাস্থ্য ক্যাডার) (03-08-2018)
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96 . How are the efficiencies of any heat engine (miu) and reversible heat engine (miuR) compared, when both are operating between same heat source and same heat sink?
  • A. miu = miuR
  • B. miu>miuR
  • C. miu
  • D. none of these
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Assistant Director (Engineering -Mechanical) | 11.01.2019
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97 . How may types of Vitamins are in human body?
  • A. 27
  • B. 11
  • C. 13
  • D. 9
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98 . If the depth of water in an open channel is greater than the critical depth, the flow is called
  • A. turbulent flow
  • B. critical flow
  • C. torrential flow
  • D. tranquil flow
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Assistant Director (Engineering -Mechanical) | 11.01.2019
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99 . If there are no externally induced flow velocities, then the Nusselt Number (Nu) does not depend upon
  • A. Prandtl number
  • B. Reynolds number
  • C. Grashof Number
  • D. none of the
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Assistant Director (Engineering -Mechanical) | 11.01.2019
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100 . Immediate blood transfusion reaction includes :
  • A. Hypokalaemia
  • B. Circulating over load
  • C. Air embolism
  • D. Hypercalcemia
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৩৯ তম (বিশেষ) বিসিএস প্রিলিমিনারি টেস্ট (স্বাস্থ্য ক্যাডার) (03-08-2018)
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101 . In a Diesel engine, during combustion the pressure may increase at a range of
  • A. 55 - 75 atm
  • B. 15 - 20 atm
  • C. 10 - 15 atm
  • D. 20 - 30 atm
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Assistant Director (Engineering -Mechanical) | 11.01.2019
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102 . In a diesel engine, fuel is ignited by ----
  • A. Spark plug
  • B. Heat resulting from Compressing air that is supplied for combustion
  • C. Combustion Chamber
  • D. Injected fuel
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ঢাকা ইলেকট্রিক সাপ্লাই কোম্পানি ।। Assistant Engineer (20-05-2023)
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103 . In adult, the daily loss of fluid in the feces, normally is:
  • A. 150 ml
  • B. 200 ml
  • C. 50ml
  • D. 100 ml
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৩৯ তম (বিশেষ) বিসিএস প্রিলিমিনারি টেস্ট (স্বাস্থ্য ক্যাডার) (03-08-2018)
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104 . In infants, defecation often follows a meal . The cause of colonic contractions in the situation is :
  • A. The gastrocolic reflex
  • B. The enterogastric reflex .
  • C. Histamine
  • D. Increased circulating level of CCk
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৩৯ তম (বিশেষ) বিসিএস প্রিলিমিনারি টেস্ট (স্বাস্থ্য ক্যাডার) (03-08-2018)
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105 . In male , obesity may be expressed if BMI is more than __
  • A. 15
  • B. 20
  • C. 25
  • D. 30
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বাংলাদেশ রেলওয়ে ।। হাসপাতালসমূহে সহকারী সার্জন (পায়রা) (06-05-2005)
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