This book provides a collection of topic-wise objective questions and solutions related to computer science and IT engineering, aimed at public sector examinations such as ISRO, DRDO, and others. It includes previous year question papers and covers various subjects like management information systems, engineering mechanics, and production planning. The content is designed to assist students in preparing for competitive exams with an emphasis on accurate answers and problem-solving techniques.

2. INTRODUCTION : This book contains topic wise
objective questions and their solutions of
Computer Science & IT Engineering for Public
sector examinations such as ISRO, DRDO,
BARC, BEL, HAL, NTPC, ONGC, BHEL, SAIL,
GAIL, MTNL,ECL, ATC, DMRC, HLL, UPRVNL,
CSPEB, OPTCL and other exams. Efforts have
been made to provide error free answers &
tricky solutions. This book also contains JET
management trainee exam previous year
question papers with solutions.

3. Contants:
1.Industry Safety 5-25
2.Energy conservation 26-30
3.Engineering Mechanics 31-45
4. Management Information System 46-60
5. Engineering Materials 61-75
6.The Strength of Materials 76-90
7. Metal Casting. 91-107
8. Inventory Control 108-123
9. Production Planning and Control 124-150
10. Computer Integrated Manufacturing Design
151-170
11. Solved question papers 171-205
12. Previous year question papers 206-250

4. (1) What is 158 times 178 ?
(a) 28124
(b) 29704
(c) 30604
(d) 27604
(e) None of theses
(2) If an amount Rs. 17548 is divided equally among
86 students. Approximately how much amount will
student get?
(a) 205
(b) 210
(c) 204
(d) 218
(e) 212

5. (3) The product of two consecutive even number is
16128 which is the larger number?
(a) 132
(b) 128
(c) 128
(d) 126
(e) None of theses
(4) There are 12 dozen bananas in a box. If there are
43 such boxes, how many banana are there in all
the boxes together ?
(a) 516
(b) 3096
(c) 61920
(d) 628

6. (e) None of theses
(5) Two pipes X and Y can fill a cistern in 10 and 15
minutes respectively. Both fill pipes are opened
together, but at the end of 3 minutes, ‘ Y’ is turned
off. How much time will the cistern take to fill ?
(a) 6 min
(b) 8 min
(c) 10 min
(d) 12 min
(e) None of these
(6) X is 30% more efficient than Y. how much time
will they working together , take to complete a job
which a alone could have done in 23 days?
(a)11 days
(b) 13 days

7. (c) 20 days
(d) None of these
(7) A 300 meter long moving with an average speed
of 126 km/hr crosses a platform in 24 seconds. A
man crosses the same platform in 5 minutes. What
is the speed of the man in meters/second?
(a) 1.8 m/s
(b) 1.2 m/s
(c) 1.5 m/s
(d) Can not be determined
(e) None of these
(8) Train A crosses a stationary train B in 35 seconds
and a pole in 14 seconds with the same speed. The
length of the train A is 280 meters. What is the
length of the stationary train B?

8. (a) 360 meters
(b) 480 meters
(c) 400 meters
(d) Can not be determined
(e) None of these
(9) 40% of 15% of 3/4th of a number is 153. What is
the number?
(a) 3400
(b) 3650
(c) 3600
(d) 3200
(e) None of these
(10) A device is connected to the motherboard is
………………………….

9. (a) called an external device
(b) called an adjunct device
(c) called a peripheral device
(d) connected using ribbon cable
(e) None of the above
(11) The first computer were programmed using
…………………
(a) assembly language
(b) machine language
(c) spaghetti code
(d) source code
(e) None of the above

10. (12) Provide the means to move the pointer on the
screen and give information to the computer by
clicking the button on the ……………….
(a) scanner
(b) mouse
(c) keyboard
(d) program
(e) None of the above
(13) Secondary storage……………………
(a) does not require power
(b) does not use magnetic media
(c) consists of four main types of device
(d) does not store information for later retrieval
(e) None of the above

11. (14) A device that provides emergency power to
your computer, conditions the voltage, and protects
against powers surges is called a ……………………..
(a) PSU = Power Supply Unit
(b) USP = Universal Surge Protector
(c) UPPS = Universal Power Protection and Supply
(d) UPS= Uninterruptible Power Supply
(15) The ratio between speed of a train and a car is
18 :13 also , a bus covered a distance of 480 kms, in
12 hours the speed of the bus is five-ninth the
speed of the train. How much distance will the car
cover in 5 hours?
(a) 250 km
(b) 280 km
(c) 260 km
(d) Can not be determined

12. (e) None of these
(16) What is the least number to be added to 1500
to make it a perfect square?
(a) 20
(b) 21
(c) 22
(d) 23
(e) None of theses
(17) The sum of there consecutive integers is 39.
which of the following is the largest among the
three?
(a) 12
(b) 15
(c) 13

13. (d) 16
(e) None of theses
(18) How many pieces of 8.6 meters length cloths
can be cut out of a length of 455.8 meters cloths?
(a) 43
(b) 48
(c) 55
(d) 53
(e) 62
(19) ??+29 = ? 2704
(a) 23
(b) 529
(c) 441
(d) 21

14. (e) None of these
(20) What is the least number to be added to 1500
to make it a prefect square?
(a) 21
(b) 35
(c) 43
(d) 59
(e) None of these
(21) - of 1150 + of 1248 = ?
(a) 140
(b) 115
(c) 125
(d) 120
(e) None of these

15. (22) % p.a. after 2 years?
(a) Rs. 200
(b) Rs. 208
(c) Rs.212
(d) Rs.220
(e) None of these
(23) What would be the compound interest
obtained on an amount of Rs. 6420 at the rate of
7% p.a. after 4 years?
(a) Rs.1869.80
(b) Rs.1796.60
(c) Rs.1786
(d) Rs.1896
(e) None of these

16. (24) Shyam invests an amount of Rs. 5690 at the
rate of 5 per cent per annum for 3 years. What
approximate amount of compound interest will he
obtain at the end of 3 years?
(a) Rs.854
(b) Rs.799
(c) Rs.843
(d) Rs.787
(e) 897
(25) Excluding the stoppages, the speed of a bus is
64 km/hr and including the stoppage the speed of
the bus is 48 km/hr. for how many minutes does the
bus stop per hour?
(a) 12.5 minutes
(b) 15 minutes

17. (c) 10 minutes
(d) 18 minutes
(e) None of these
(1) What is 158 times 178 ?
(a) 28124
(b) 29704
(c) 30604
(d) 27604
(e) None of theses
(2) If an amount Rs. 17548 is divided equally among
86 students. Approximately how much amount will
student get?
(a) 205
(b) 210

18. (c) 204
(d) 218
(e) 212
(3) The product of two consecutive even number is
16128 which is the larger number?
(a) 132
(b) 128
(c) 128
(d) 126
(e) None of theses
(4) There are 12 dozen bananas in a box. If there are
43 such boxes, how many banana are there in all
the boxes together ?
(a) 516

19. (b) 3096
(c) 61920
(d) 628
(e) None of theses
(5) Two pipes X and Y can fill a cistern in 10 and 15
minutes respectively. Both fill pipes are opened
together, but at the end of 3 minutes, ‘ Y’ is turned
off. How much time will the cistern take to fill ?
(a) 6 min
(b) 8 min
(c) 10 min
(d) 12 min
(e) None of these

20. (6) X is 30% more efficient than Y. how much time
will they working together , take to complete a job
which a alone could have done in 23 days?
(a)11 days
(b) 13 days
(c) 20 days
(d) None of these
(7) A 300 meter long moving with an average speed
of 126 km/hr crosses a platform in 24 seconds. A
man crosses the same platform in 5 minutes. What
is the speed of the man in meters/second?
(a) 1.8 m/s
(b) 1.2 m/s
(c) 1.5 m/s
(d) Can not be determined
(e) None of these

21. (8) Train A crosses a stationary train B in 35 seconds
and a pole in 14 seconds with the same speed. The
length of the train A is 280 meters. What is the
length of the stationary train B?
(a) 360 meters
(b) 480 meters
(c) 400 meters
(d) Can not be determined
(e) None of these
(9) 40% of 15% of 3/4th of a number is 153. What is
the number?
(a) 3400
(b) 3650
(c) 3600
(d) 3200

22. (e) None of these
(10) A device is connected to the motherboard is
………………………….
(a) called an external device
(b) called an adjunct device
(c) called a peripheral device
(d) connected using ribbon cable
(e) None of the above
(11) The first computer were programmed using
…………………
(a) assembly language
(b) machine language
(c) spaghetti code
(d) source code

23. (e) None of the above
(12) Provide the means to move the pointer on the
screen and give information to the computer by
clicking the button on the ……………….
(a) scanner
(b) mouse
(c) keyboard
(d) program
(e) None of the above
(13) Secondary storage……………………
(a) does not require power
(b) does not use magnetic media
(c) consists of four main types of device
(d) does not store information for later retrieval

24. (e) None of the above
(14) A device that provides emergency power to
your computer, conditions the voltage, and protects
against powers surges is called a ……………………..
(a) PSU = Power Supply Unit
(b) USP = Universal Surge Protector
(c) UPPS = Universal Power Protection and Supply
(d) UPS= Uninterruptible Power Supply
(15) The ratio between speed of a train and a car is
18 :13 also , a bus covered a distance of 480 kms, in
12 hours the speed of the bus is five-ninth the
speed of the train. How much distance will the car
cover in 5 hours?
(a) 250 km
(b) 280 km

25. (c) 260 km
(d) Can not be determined
(e) None of these
(16) What is the least number to be added to 1500
to make it a perfect square?
(a) 20
(b) 21
(c) 22
(d) 23
(e) None of theses
(17) The sum of there consecutive integers is 39.
which of the following is the largest among the
three?
(a) 12

26. (b) 15
(c) 13
(d) 16
(e) None of theses
(18) How many pieces of 8.6 meters length cloths
can be cut out of a length of 455.8 meters cloths?
(a) 43
(b) 48
(c) 55
(d) 53
(e) 62
(19) ??+29 = ? 2704
(a) 23
(b) 529

27. (c) 441
(d) 21
(e) None of these
(20) What is the least number to be added to 1500
to make it a prefect square?
(a) 21
(b) 35
(c) 43
(d) 59
(e) None of these
(21) - of 1150 + of 1248 = ?
(a) 140
(b) 115
(c) 125

28. (d) 120
(e) None of these
(22) % p.a. after 2 years?
(a) Rs. 200
(b) Rs. 208
(c) Rs.212
(d) Rs.220
(e) None of these
(23) What would be the compound interest
obtained on an amount of Rs. 6420 at the rate of
7% p.a. after 4 years?
(a) Rs.1869.80
(b) Rs.1796.60
(c) Rs.1786

29. (d) Rs.1896
(e) None of these
(24) Shyam invests an amount of Rs. 5690 at the
rate of 5 per cent per annum for 3 years. What
approximate amount of compound interest will he
obtain at the end of 3 years?
(a) Rs.854
(b) Rs.799
(c) Rs.843
(d) Rs.787
(e) 897
(25) Excluding the stoppages, the speed of a bus is
64 km/hr and including the stoppage the speed of
the bus is 48 km/hr. for how many minutes does the
bus stop per hour?

30. (a) 12.5 minutes
(b) 15 minutes
(c) 10 minutes
(d) 18 minutes
(e) None of these
(26) A car covers a distance of 540 km in 9 hours.
Speed of a train is double the speed of the car .
Two- third the speed of the train is equal to the
speed of a bike. How much distance will the bike
cover in 5 hours?
(a) 450 km
(b) 360 km
(c) 400 km
(d) 500 km
(e) None of these