Mechanical Engineering - Compressors, Gas Dynamics and Gas Turbines
Exercise :: Compressors, Gas Dynamics and Gas Turbines - Section 1
46. |
The increase in pressure in a roots blower is entirely due to back flow of air. |
Answer: Option A
Explanation:
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47. |
The type of rotary compressor used in aeroplanes, is of |
A. |
centrifugal type | B. |
axial flow type | C. |
radial flow type | D. |
none of these |
Answer: Option B
Explanation:
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48. |
An axial compressor gives optimum performance at high speeds and large volume flows. |
Answer: Option A
Explanation:
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49. |
In a reciprocating air compressor, the compression work per kg of air |
A. |
increases as clearance volume increases | B. |
decreases as clearance volume increases | C. |
is independent of clearance volume | D. |
increases as clearance volume decreases |
Answer: Option C
Explanation:
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50. |
The degree of reaction in an axial flow compressor is defined as the ratio of static enthalpy rise in the |
A. |
rotor to static enthalpy rise in the stator | B. |
stator to static enthalpy rise in the rotor | C. |
rotor to static enthalpy rise in the stage | D. |
stator to static enthalpy rise in the stage |
Answer: Option C
Explanation:
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