RRB Group D 2019 Previous Year Paper (19-Sep-2022) (Shift-3)

Question 1

Which of the following is produced when baking powder is heated?

Accepted Answer

Carbon dioxide and sodium salt of tartaric acid is produced.

Answer

Carbon dioxide and sodium carbonate is produced.

Answer

Carbon monoxide and sodium salt of tartaric acid is produced.

Answer

Carbon monoxide and sodium carbonate is produced.

Question 2

Select the set in which the numbers are related in the same way as are the numbers of the following sets.
(NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13-Operations on 13 such as adding /deleting /multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed)

Accepted Answer

(10, 156, 4)

Answer

(9, 168, 3)

Answer

(11, 144, 9)

Answer

(13, 131, 5)

Question 3

The most essential difference between a DC and an AC generator is

Accepted Answer

DC generator has permanent magnet and AC has an electromagnet

Answer

Higher Voltages are generated by AC generator Only

Answer

Higher voltages are generated by DC generator only

Answer

DC generator uses a commutator and AC generator uses Slip rings

Question 4

Suppose in a circuit, several electric lamps are required to be used on a 220 V electric supply line, and they are rated as 20 W. If the maximum allowable current is 10 A, then the number of lamps that can be connected in parallel with each other across the two wires of the 220 V line is:

Accepted Answer

110

Answer

220

Answer

55

Answer

165

Question 5

Sony and Mary can complete a painting in 4 days and 6 days, respectively. They work on same painting on alternate days starting with Mary. In how many days will they together complete the painting?

Accepted Answer

5

Answer

4.5

Answer

4.75

Answer

5.25

RRB Group D 2019 Previous Year Paper (19-Sep-2022) (Shift-3)

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