Related Questions

Which of the following devices may be used to provide protection against lightening over voltages ?
A Horn gaps
B Rod gaps
C Surge absorbers
D All of the above
In a four stroke I.C. engine, the turning moment during the compression stroke is
A positive throughout
B negative throughout
C positive during major portion of the stroke
D negative during major portion of the stroke
For S.H.M. cam, the acceleration of the follower at the ends of the stroke and aimed stroke respectively, is
A maximum and zero
B zero and maximum
C minimum and maximum
D zero and minimum
In a four stroke cycle petrol engine, the pressure inside the engine cylinder during the suction stroke is __________ the atmospheric pressure.
A equal to
B below
C above
D middle
When the primary direct crank of a reciprocating engine makes an angle of $$\theta $$ with the line of stroke, then the secondary direct crank will make an angle of _________ with the line of stroke.
A $$\frac{\theta }{2}$$
B $$\theta $$
C $$2\theta $$
D $$4\theta $$
A two stroke cycle engine gives ________ the number of power strokes as compared to the four stroke cycle engine, at the same engine speed.
A Half
B Same
C Double
D Four times
Thermal efficiency of a two stroke cycle engine is _________ a four stroke cycle engine.
A Equal to
B Less than
C Greater than
D None of these
Theoretically, a four stroke cycle engine should develop _________ power as that of a two stroke cycle engine.
A Half
B Same
C Double
D Four times
Two stroke engine compared to a four stroke engine has
A Higher efficiency
B Less fuel consumption
C Higher power to weight ratio
D Lower initial cost
The following are the half lives of four active isotopes. Which one of the following is the most dangerous to handle?
A 3 billion years
B 100 years
C 0.01 minute
D 13 days

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