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What is the hole angle degree in an upward direction in a multi-hole nozzle?

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in Automotive Engine Design by (137k points)
What is the hole angle degree in an upward direction in a multi-hole nozzle?

(a) 10

(b) 15

(c) 17

(d) 20

The question was asked in an online interview.

My question comes from Diesel Engine Fuel Supply System in section Diesel Engine Fuel Supply System of Automotive Engine Design

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Best answer
The correct choice is (d) 20

Explanation: In a multi-nozzle injector the nozzle consist of several holes bored in these tip of the nozzle. The number of while varies from 4 to 18 and the whole angle is about 20 degrees upwards.

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