Power capacitors are used
A.To improve electrical capacity
B.To improve efficiency
C.To reduce power factor
D.To improve power factor
E.None of the above
Category: Engineeeing Mcqs
Laser is an acronym for light amplification by
A.stimulated emission of radiation
B.spontaneous emission of radiation
C.stimulated energetic radiation
D.spontaneous emission of radio waves
In plain carbon steel as the percentage of carbon increases from 0.2% to 0.8% which of the following decreases?
A.Brinell hardness number
B.Tensile strength
C.Percentage elongation
D.All of the above
E.None of the above
The chemical name of bleaching powder is
A.calcium chloro hypochlorite
B.calcium hypochlorite
C.calcium chlorate
D.calcium perchlorate
The freezing point of ammonia is
A.0?C
B.? 20?C
C.? 77.8?C
D.? 132.5?C
E.? 202.5?C
Moisture in Freon refrigeration system causes
A.Ineffective refrigeration
B.Damage to compressor
C.High power consumption
D.Freezing of automatic regulating valve
E.None of the above
Rupture stress is
A.Proof stress
B.Breaking stress
C.Highest value of stress
D.Stress given by dividing the load at the moment of incipient fracture, by the area supporting that load
E.Stress at breaking point
What is the difference in two specific heats Cp and Cv of one gram of helium ? The molecular weight of helium is 4. Assume that helium behaves as an ideal gas.
A.2 kcal/(kg.K)
B.8 kcal/(kg.K)
C.1 kcal/(kg.K)
D.0.5 kcal/(kg.K)
For the same power and same speed, the flywheel of a two stroke engine as compared to that of a four stroke engine will be
A.Bigger
B.Small
C.Same size
D.Different shape
E.There is no correlation
Which of the following hydrocarbons present in gasoline are prone to gum formation?
A.Paraffins
B.Naphthenes
C.Olefins
D.Isoparaffins
