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Q1. The number of digits in octal system is

(a) 8

(b) 7

(c) 10

(d) none

Answer: (a)

Q2. The number of digits in Hexadecimal system is

(a)15

(b)17

(c)16

(d) 8

Answer: (c)

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Q3. The number of bits in a nibble is

(a)16

(b) 5

(c) 4

(d) 8

Answer: (c)

Q4. Which of the following binary numbers is equivalent to decimal 10

(a)1000

(b)1100

(c)1010

(d)1001

Answer: (c)

Q5. What is the output state of an OR gate if the inputs are 0 and 1?

(a)0

(b)1

(c)3

(d)2

Answer: (b)

Q6. What is the output state of an AND gate if the inputs are 0 and 1?

(a) 0

(b)1

(c)3

(d)2

Answer: (a)

Q7. Logic states can only be ___ or 0.

(a) 3

(b) 2

(c) 1

(d) 0

Answer: (c)

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Q8. A byte corresponds to

(a) 4 bits

(b) 8 bits

(c) 16 bits

(d) 32 bits

Answer: (b)

Q9. An OR gate has…

(a) Two inputs and one output

(b) One input and one output

(c) One input and two outputs

(d) none of above

Answer: (a)

Q10. In PERT analysis a critical activity has

(a) maximum Float

(b) zero Float

(c) maximum Cost

(d) minimum Cost

Answer : (b)

Q11. The S-N curve for steel becomes asymptotic nearly at

(a) 103 cycles

(b) 104 cycles

(c) 106 cycles

(d) 109 cycles

Answer : (c)

Q12. The angle between two unit-magnitude coplanar vectors P(0.866, 0.500,0) and Q(0.259, 0.966,0) will be

(a) 0°

(b) -30°

(c) 45°

(d) 60°

Answer : (c)

Q13. A lot has 10% defective items. Ten items are chosen randomly from this lot. The probability that exactly 2 of the chosen items are defective is

(a) 0.0036

(b) 0.1937

(c) 0.2234

(d) 0.3874

Answer : (b)

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Q14. S-N curve for steel becomes asymptotic nearly at

(a) 103 cycles

(b) 104 cycles

(c) 106 cycles

(d) 109 cycles

Answer : (c)

Q15. The execution of a CNC part program block NO20 GO2 X45.0 Y25.0 R5.0 the type of tool motion will be

(a) circular Interpolation —clockwise

(b) circular Interpolation —counterclockwise

(c) linear Interpolation

(d) rapid feed

Answer : (a)

Q16. In a rolling process, sheet of 25 mm thickness is rolled to 20 mm thickness. Roll is of diameter 600 mm and it rotates at 100 rpm. The roll strip contact length will be

(a) 5 mm

(b) 39 mm

(c) 78mm

(d) 120mm

Answer : (a)

Q17. A NAND gate is equivalent to an AND gate plus a …. gate put together.

(a) NOR

(b) NOT

(c) XOR

(d) none

Answer: (b)

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Q18. Decimal number 10 is equal to binary number

a.1110

b.1000

c.1001

d.1010

Answer: (d)

Q19. Environment friendly refrigerant R134a is used in the new generation domestic

refrigerators. Its chemical formula is

(a) CH C1 F2

(b) C2 C13 F3

(c) C2 C12 F4

(d) C2 H2 F4

Answer : (d)

Q20. Hexadecimal number F is equal to octal number

(a)15

(b)16

(c)17

(d)18

Answer: (c)