The thermal efficiency of a standard Otto cycle for a compression ratio of 5.5 will be
A. 25%
B. 50%
C. 70%
D. 100%
Answer B
In a four stroke cycle, the minimum temperature inside the engine cylinder occurs at the
A. beginning of suction stroke
B. end of suction stroke
C. beginning of exhaust stroke
D. end of exhaust stroke
Answer A
The reference fuels for knock rating of spark ignition engines would include
A. iso-octane and alpha-methyl naphthalene
B. normal octane and aniline
C. iso-octane and normal hexane
D. normal heptane and iso-octane
Answer D
The critical pressure ratio for initially dry saturated steam is
A. 0.546
B. 0.577
C. 0.582
D. 0.601
Curtis turbine is a
A. simple reaction turbin
B. velocity compounded turbine
C. pressure compounded turbine
D. pressure-velocity compounded turbine
