31000+ Important MCQs for CDS

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Learn CDS MCQs with answers [Page 13 of Department 107]

R

Ravi Chauhan • 11.26K Points
Tutor II Math

121) Mr.Mittal purchased a car for Rs. 3,00,000 and a bike for his son for Rs. 1,00,000. He sold the car at a profit of 10% and bike at a loss of 20%. What is the net gain or loss?

  • (A) 2% gain
  • (B) 1.5% loss
  • (C) 2.5% loss
  • (D) 2.5% gain
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Correct Answer - Option (D)

Explanation :

Gain = 10% of 3,00,000 = 30000
Loss = 20% of 1,00,000 = 20000
Net gain = 10000 over Rs.4 lakh
Hence, profit = 10000/400000 x 100 = 2.5%

R

Ram Sharma • 193.88K Points
Coach Physics

122) Non-conductors whose polarisation is caused by an electric field are known as

  • (A) Super-conductors
  • (B) Semi-conductors
  • (C) Dielectric
  • (D) Insulators
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Correct Answer - Option (C)

No Explanation found. Add Explanation and get +2 points.

R

Ram Sharma • 193.88K Points
Coach Physics

123) Which of the following statement is true?

  • (A) A galvanometer with low resistance in parallel is a voltmeter
  • (B) A galvanometer with high resistance in series is an ammeter
  • (C) A galvanometer with high resistance in parallel is a voltmeter
  • (D) A galvanometer with low resistance in series is an ammeter
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Correct Answer - Option (D)

No Explanation found. Add Explanation and get +2 points.

R

Ram Sharma • 193.88K Points
Coach Physics

124) Pressure cooker cooks rice faster because

  • (A) High pressure crushes the hard covering of rice grains
  • (B) High pressure raises the boiling point of water
  • (C) It does not let the heat energy escape easily
  • (D) It always lets the steam escape
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Correct Answer - Option (B)

No Explanation found. Add Explanation and get +2 points.

R

Ram Sharma • 193.88K Points
Coach Biology

125) Plants are killed in winter by frost

  • (A) Because of desiccation and mechanical damage to the tissues
  • (B) Because there is no transpiration
  • (C) Because respiration ceases at such low temperature
  • (D) Because no photosynthesis takes place at such low temperature
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Correct Answer - Option (A)

No Explanation found. Add Explanation and get +2 points.

R

Ram Sharma • 193.88K Points
Coach Physics

126) The purpose of laminating a transformer core is

  • (A) Increase the main flux
  • (B) Laminated core provides high flux density
  • (C) Difficulty of fabricating solid core
  • (D) Avoid eddy current and hysteresis losses
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Correct Answer - Option (D)

No Explanation found. Add Explanation and get +2 points.

R

Ram Sharma • 193.88K Points
Coach Physics

127) Larger buildings may be supplied with a medium voltage electricity supply, and will require a substation or mini-sub. What is the main item of equipment contained in these?

  • (A) Transducer
  • (B) Transponder
  • (C) Converter
  • (D) Transformer
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Correct Answer - Option (D)

No Explanation found. Add Explanation and get +2 points.

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