Applied Thermodynamics (3161910) MCQs

MCQs of Part-III Axial Flow Compressors

Showing 11 to 20 out of 23 Questions
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11.

The degree of reaction is usually kept ________ for all types of axial flow compressors.

(a)

0.2
(b)

0.3
(c)

0.4
(d)

0.5
Answer:

Option (d)

12.

Axial flow compressor has the following advantage over centrifugal compressor

(a)

larger air handling ability per unit frontal area
(b)

higher pressure ratio per stage
(c)

aerofoil blades are used
(d)

higher average velocities
Answer:

Option (a)

13.

The line representing the locus of all points midway between the upper and lower mean surfaces of an aerofoil is known as

(a)

camber line
(b)

leading edge
(c)

trailing edge
(d)

none of the mentioned
Answer:

Option (a)

14.

Purpose of camber in an airfoil is ____________.

(a)

to increase maximum drag
(b)

to increase maximum lift
(c)

to decrease maximum lift
(d)

to decrease maximum drag
Answer:

Option (b)

15.

What is a chord?

(a)

Distance between leading edge and chord
(b)

Distance between chord and chamber
(c)

Distance between leading edge and trailing edge
(d)

Distance between trailing edge and chord
Answer:

Option (c)

16.

Purpose of leading edge is to ___________.

(a)

allow the wing to operate at high angle of attack
(b)

allow the wing to operate at low angle of attack
(c)

allow the wing to operate at stall condition
(d)

allow the wing to operate in level condition
Answer:

Option (a)

17.

What is the purpose of the trailing edge?

(a)

Stalling will created
(b)

Airflow rejoins
(c)

Vortex are created
(d)

Airflow separated
Answer:

Option (b)

18.

What is the shape of the airfoil at the leading edge?

(a)

Semi-circular
(b)

Curve
(c)

Straight
(d)

Circular
Answer:

Option (d)

19.

What is the shape of the airfoil at the trailing edge?

(a)

Sharp circular arc
(b)

Curve
(c)

Straight
(d)

Semi-circular
Answer:

Option (a)

20.

The component normal to direction of undisturbed air stream called the

(a)

drag
(b)

lift
(c)

viscous force
(d)

all of the mentioned
Answer:

Option (b)

Showing 11 to 20 out of 23 Questions
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