MECHANICAL QUIZ :2

Online Examination for Mechanical Quiz Question And Answer

Online Test

1. A turbine is said to have an axial discharge when the steam leaves the blade tip at __________ to the direction of the blade motion

60°
90°
180°
270°
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2. The flow through a nozzle is regarded as

constant volume flow
constant pressure flow
isothermal flow
isentropic flow
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3. The ratio of total useful heat drop to the total isentropic heat drop, is called

stage efficiency
internal efficiency
Rankine efficiency
none of these
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4. The pressure at which the steam leaves the nozzle is known as back pressure.

Correct
Incorrect
may be
none
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5. The reference fuels for knock rating of spark ignition engines would include

iso-octane and alpha-methyl naphthalene
normal octane and aniline
iso-octane and normal hexane
normal heptane and iso-octane
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6. The diesel engines are also known as __________ engines.

compression ignition
spark ignition
spot
mig
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7. The thermal efficiency of a standard Otto cycle for a compression ratio of 5.5 will be

25%
50%
70%
100%
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8. In a four stage compressor, if the pressure at the first and third stage are 1 bar and 16 bar, then the delivery pressure at the fourth stage will be

1 bar
16 bar
64 bar
256 bar
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9. The compressed air may be used

in gas turbine plants
for operating pneumatic drills
in starting and supercharging of I.C. engines
all of the above
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10. A zero-level detector is a

comparator with a sine-wave output
comparator with a trip point referenced to zero
peak detector
limiter
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Score =
Correct answers: