Question

Calculate engine rating in
HP), diameter of cylinder =
2.91 inch, number of cylinder
04
Options (Marks: 4)
(Tap/Click on option)
Option 1
13.58
Option 2
D 18.62
Option 3
D 5.29
Option 4
D 4.65
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Answer 1

Answer:

The RAC formula states:

h.p. = (D^2 x n)/2.5

where D = the diameter of the cylinder in inches [1" = 25.4mm], and n = the number of cylinders

Therefore the calculation becomes:

H.P=((2.91)^2 *4)/2.5 =(8.46*4)/2.5 =33.84/2.5=13.54 ~13.58(option 1)

= (D2 x n)/2.5  (accurate to about 0.4%)

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Answer 2

Answer:

The Right option is 21) 13.58

Explanation:

Engine Rating or Brake power in HP

we know that

Engine Rating (Hp) = D*2×n/2.5 (from RAC)

we have given in the question

D-- Diameter = 2.91 inches

n-- number of cylinders= 4

Now put these values in above equation

Engine Rating (HP) = (2.91) *2×4/2.5

=> 8.4681×4/2.5 = 13.58 Hp

which is the answer