Stirling and Ericsson cycle are
  • a)
    Reversible cycles
  • b)
    Irreversible cycles
  • c)
    Quasi-static cycles
  • d)
    Semi-reversible cycle
Correct answer is option 'A'. Can you explain this answer?

Engineers Adda answered  •  5 hours ago
Stirling cycle and Ericsson cycle are the modified forms of the Carnot cycle.
A Stirling cycle consists of two reversible isothermal and two reversible constant volume (isochoric) processes.
ηStirling = T3/T1/T3
Which is the same as Carnot’s efficiency.
Whereas an Ericsson cycle consists of two reversible isothermal and two reversible constant pressure (isobaric) processes.
ηericsson = 1−T1/T3which is the same as Carnot efficiency

The type of tail found in Shark is-
  • a)
    Homocercal
  • b)
    Heterocercal
  • c)
    Diphycercal
  • d)
    Protocercal
Correct answer is option 'B'. Can you explain this answer?

Learners World answered  •  5 hours ago
The shark’s tail consists of the caudal peduncle and the caudal fin, which provide the primary source of thrust for the shark. Most sharks have heterocercal caudal fins, meaning that the backbone extends into the (usually longer) upper lobe.

The advantage of electric braking is-
  • a)
    It is instantaneous
  • b)
    More heat is generated during braking
  • c)
    It avoids wear to remain loaded
  • d)
    Motor continue to remain loaded during braking
Correct answer is option 'C'. Can you explain this answer?

Naroj Boda answered  •  5 hours ago
Electric braking is fast and cheap.
• In electric braking there is no maintenance cost like replaced brake shoes periodically.
• By using electric braking the capacity of the system( like higher speeds, heavy loads) can be increased.
• A part of energy is returned to the supply consequently the running cost is reduced.
• In electric braking negligible amount of heat is generated whereas in mechanical braking enormous heat is produced at brake shoes which leads to failure of brakes.

If “PEN” is coded as “40” and “ORANGE” is coded as “81,” then how will “CARPET” be coded as?
  • a)
    63
  • b)
    54
  • c)
    69
  • d)
    74
Correct answer is option 'C'. Can you explain this answer?

Learners World answered  •  5 hours ago
The pattern is as followed,
From the place value of alphabets, P = 16; E = 5; N = 14,
Place value of vowel will be doubled, and after adding the obtained values we get
16 + 10 + 14 = 40
Similarly, O = 15; R = 18; A = 1; N = 14; G = 7; E = 5,
Place value of vowel will be doubled, and after adding the obtained values we get
30 + 18 + 2 + 14 + 7 + 10 = 81
Thus, the logic for CARPET will be,
C = 3; A = 1; R = 18; P = 16; E = 5; T = 20
Place value of vowel will be doubled, and after adding the obtained values we get
3 + 2 + 18 + 16 + 10 + 20 = 69
Hence option 3 will be the correct answer.

If reverse biased is applied to the p-n diode, the depletion region width-
  • a)
    Reduces
  • b)
    Remain same
  • c)
    Increases
  • d)
    Either decreases or increase
Correct answer is option 'C'. Can you explain this answer?

Learners World answered  •  6 hours ago
If the reverse-biased voltage applied on the p-n junction diode is further increased, then even more number of free electrons and holes are pulled away from the p-n junction. This increases the width of the depletion region. Hence, the width of the depletion region increases with an increase in voltage.
Hence, the correct option is (C)
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