Which of the following is a hard currency?
A.Takka
B.Dinar
C.Yen
D.Rival
Category: Engineeeing Mcqs
Which of the following is the displacement type blow measuring device?
A.Reciprocating piston
B.Semi-rotary piston
C.Nutating disc
D.Helix type
E.Turbine
The most efficient agent for the absorption of SO3 is
A.80% H2SO4
B.98.5% H2SO4
C.90% H2SO4
D.20% oleum
A perfect black body is the one which
A.Absorbs all incident radiation
B.Reflects all incident radiation
C.Absorbs most of the incident radiation
D.Is coated with lamp black
A steam pipe is to be insulated by two insulating materials put over each other. For best results
A.Better matt. Over pipe and inferior over it
B.Inferior matt. Over pipe and better over it
C.Can be in any order
D.None of the above
Air and other non-condensable gases (foul gases) get into a refrigeration system through
A.Decomposition of refrigerant in contact with impurities
B.Breakdown of oil
C.Under vacuum operation or during maintenance work
D.Corrosion
E.Any of the above
Butane is flammable in concentrations from
A.4.1 to 74.2 %
B.5.3 to 14.0 %
C.1.6 to 8.5 %
D.3.2 to 12.5 %
In the manufacture of sulphuric acid by contact process platinum catalyst was previously used but suffers from
A.easy poisoning
B.fragility
C.high initial investment
D.all of these answers
Which one of the following assumptions is not involved while deriving relation for air standard efficiency of Otto cycle?
A.The working fluid is air for which the specific heats are constant
B.There is no chemical reaction inside the engine clinder
C.Expansion and compression are adiabatic
D.There is always thermal and chemical equilibrium
E.The engine operates at mederate rpm
In case of spur gears the top land is
A.The part of the tooth surface lying below the pitch surface
B.The curve forming face and flank
C.The width of the gear tooth measured axially along the pitch surface
D.The surface of the top of the tooth
E.Radius that connects the root circle to the profile of the tooth
