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## UPSC CAPF AC Previous Year Question Papers

Those candidates who want to crack UPSC Recruitment Exam by scoring good marks can start preparation with the help of below stated PDF of UPSC CAPF AC Previous Year Question Papers.

Through UPSC CAPF AC Previous Year Question Papers with Solutions you can easily understand the level of questions, pattern of questions etc. So, candidates are advised to download UPSC CAPF AC Previous Year Question Papers PDF from here.

Who conducts UPSC CAPF AC Exam?

Authority of Union Public Service Commission (UPSC) organizes the examination for the Central Armed Police Force (CAPF), Assistant Commandants (AC), Group A in the Central Armed Police Forces (CAPF) viz Border Security Force (BSF), Central Reserve Police Force (CRPF), Central Industrial Security Force (CISF) and Indo-Tibetan Border Police (ITBP).

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### UPSC CAPF AC Previous Year Question Papers

UPSC CAPF AC Previous Year Question and Answers

Question 1: When a fourth resistor is connected in series with three resistors, the total resistance

1. increases by one-fourth
2. increases
3. decreases
4. remains the same

Question 2: A string of five series resistors is connected across a 6 V battery. Zero voltage is measured across all resistors except R3. The voltage across R3 is

1. 0 V
2. 2 V
3. 6 V
4. 6 V

Question 3: A series circuit consists of three resistors with values of 120 , 270 , and 330 . The total resistance is

1. less than 120
2. the average of the values
3. 720
4. 120

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Question 4: A certain series circuit consists of a 1/8 W resistor, a 1/4 W resistor, and a 1/2 W resistor. The total resistance is 1200 . If each resistor is operating in the circuit at its maximum power dissipation, total current flow is

1. 27 mA
2. 7 mA
3. 19 mA
4. 190 mA

Question 5: Which of the following series combinations dissipates the most power when connected across a 120 V source?

1. one 220 resistor
2. two 220 resistors
3. three 220 resistors
4. four 220 resistors

Question 6: Two resistors are in series: a 5.6 k resistor and a 4.7 k resistor. The voltage drop across the 5.6 k resistor is 10 V. The voltage across the 4.7 k resistor is

1. 39 V
2. 10 V
3. 32 V
4. 0 V

Question 7: Three 680 resistors are connected in series with a 470 V source. Current in the circuit is

1. 69 mA
2. 230 mA
3. 23 mA
4. 690 mA

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Question 8: There are five resistors in a given series circuit and each resistor has 6 V dropped across it. The source voltage

1. is 6 V
2. depends on the current flow
3. depends on the resistor values
4. is 30 V

Question 9: If a 6 V and a 9 V source are connected series aiding, the total voltage is

1. 6 V
2. 9 V
3. 3 V
4. 15 V

Question 10: Five resistors are connected in a series and there is a current of 3 A into the first resistor. The amount of current into the second resistor is

1. 3 A
2. 1 A
3. 4 A
4. 3 A

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Question 11: Surge tanks are used

1. for storage water
2. to increase the velocity in a pipeline
3. as overflow valves
4. to guard against water hammer.

Question 12: As per IS : 1172-1963, water required per head per day for average domestic purposes, is

1. 50 litres
2. 65 litres
3. 85 litres
4. 105 litres
5. 135 litres.

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Question 13: In slow sland filters, the turbidity of raw water can be removed only up to

1. 60 mg/litre
2. 75 mg/litre
3. 100 gm/litre
4. 150 mg/litre.

Question 14: Biochemical Oxygen Demand (B.O.D.) of safe drinking water must be

1. nil
2. 5
3. 10
4. 15
5. 20

Question 15: Acidity in water is caused due to

1. Mineral acids
2. Free CO2
3. Iron sulphate
4. Aluminium sulphate
5. All the above.

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Question 16: The transitional middle portion of a logistic curve follows

1. a geometric growth
2. a logarithmic growth
3. a first over curve
4. a constant rate.

Question 17: Pick up the correct statement from the following :

1. Excess quantities of iron and manganese in water, cause discolouration of clothes
2. Lead and barium salts have toxic effect
3. Arsenic and selenium are poisonous to human health
4. Higher copper content affects the lungs
5. All the above.

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Question 18: Pick up the incorrect statement from the following regarding fire hydrants

1. Fire hydrants are fitted in water mains at 100 m to 150 m apart at fire
2. The minimum water pressure hydrants, is kept 1.5 kg/cm2
3. The water at pressure 1 to 1.5 kg/cm2 is made available for 4 to 5 hours for constant use
4. None of these.

Question 19: The specific retention is least in case of

1. Clay
2. Sand
3. Silt
4. Coarse gravel.

Question 20: B.O.D. of treated water should be

1. 10 ppm
2. 25 ppm
3. 20 ppm
4. 30 ppm
5. NIL