1801-1900

1801-1900

Professional Development

100 Qs

quiz-placeholder

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Assessment

Quiz

Science

Professional Development

Easy

Created by

Hoài Đào

Used 15+ times

FREE Resource

100 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

1801. If the airflow is constant and you decrease the diameter of the jet nozzle (Level 1)
a) The outlet velocity does not change
b) The outlet velocity decrease
c) The outlet velocity increase

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

1802. The thrust is generated by (Level 1)
a) Pushing against the atmosphere
b) Acceleration of airflow
c) Acceleration of airflow and pushing against the atmosphere

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

1803. With increasing altitudes (Level 1)
a) The ambient pressure decreases and the temperature decreases
b) The ambient pressure decreases and the temperature increases
c) The ambient pressure increases and the temperature decreases

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

1804. There was no engine compressor before 1937 due to (Level 2)
a) There was no one can invent it
b) There was no material that was heat-resistant enough for continuous combustion.
c) The engine without compressor has better performance

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

1805. Turboprop engines do not use on large A/C due to (Level 2)
a) This engine is very loud
b) This engine is not efficient
c) It's hard to manage the rotation speed of propeller

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

1806. On modern turbofan engines the bypass ratio is between 4:1 and 9:1, that means the fan can produce more than 80% to …% of the total thrust (Level 2)
a) 0.9
b) 0.7
c) 0.95

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

1807. If the velocity of the air at the engine inlet increases, thrust force would be (Level 2)
a) Stay the same
b) Increased
c) Decreased

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