RRB JE Electrical Solved Question paper 2012 | RRB JE Electrical

Ques.81. What would be the expenditure in 30 days at the rate of 50 paise per unit, if a bulb of 100 W is used five hours per day?

1. Rs.10.50
2. Rs.8.50
3. Rs.7.50
4. Rs.9.50

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Ques.82. P, Q, R, S, and T are five friends, P is shorter than Q but taller than T. R is tallest. S is shorter than Q and taller than P. Who has two people taller and two persons shorter than him/her?

1. P
2. Q
3. T
4. S

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Ques.83. The minimum value of function y = x⁵ − 4x⁴ + 5x³ − 1 will occur when the value of x is equal to_______

1. 0
2. 1
3. 2
4. 3

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Ques.84. What is the length of bridge, which a 130 m long train travelling at 45 kmph can cross in 30 seconds?

1. 225 m
2. 245 m
3. 275 m
4. 300 m

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Ques.85. A train 125 m long passes a man running at 5 km/hr in the same direction in which the train is going  in 10 seconds. The speed of the train is

1. 15 km/hr
2. 50 km/hr
3. 54 km/hr
4. 60 km/hr

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Ques.86. The smallest number which when divided by 27, 42, 63, 84 will leave in each case 21 as the remainder is

1. 760
2. 745
3. 777
4. 767

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Ques.87. The area of the path 1 meter wide surrounding a playground 60 m long and 40 m broad is

1. 204 sq. m
2. 209 sq . m
3. 260 sq. m
4. 272 sq. m

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Ques.88. Ria spends 75% of their income. Her income is increased by 20% and she has increased her expenditure by 10% Her saving is increased by

1. 30%
2. 40%
3. 50%
4. 60%

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Ques.89. Two pipes can fill a tank in 20 minutes and 30 minutes respectively. If both the pipes are open simultaneously, then the tank will filled in

1. 10 minutes
2. 12 minutes
3. 15 minutes
4. 25 minutes

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Ques.90. The product of two positive number is 2500. If one is four times  the other, then the sum of two number is

1. 25
2. 125
3. 225
4. 250

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