A crate weighing 40 kg rests on a cart moving with an acceleration W. The coefficient of friction between the cart and the crate is
A.0.25 m/sec2
B.2.45 m/sec2
C.1.25 m/sec2
D.4.00 m/sec2
E.4.16 m/sec2
Category: Mechanical Engineering Mcqs
Which of the following material is corrosive?
A.Zinc oxide
B.Sulphur
C.Starch
D.Soap flakes
Dew points temperature is an indication of
A.Moisture content of air
B.Dryness of air
C.Lowest temperature where air and water vapour start separating
D.Condition air
E.Any of the above
In case of diesel-electric locomotives
A.power output of diesel engine is taken by dc generator
B.electric motors serve as prime source of power
C.electric motors as well diesel engine provide the propulsive power
D.None of the above
Which of the following is usually not used as the heat exchange fluid in a flat-plate solar collector?
A.Air
B.Fuel oil
C.Water
D.Ethylene glycol and water
A stream line
A.is always the path of a particle
B.is a line drawn in the flow region such that the tangent drawn at any point on the line indicates the direction of velocity
C.is a line drawn in the flow region such that there is mass flow across the line
D.is not fixed in steady flow
A cube of wood supporting 200 gm mass just floats in water. When the mass is removed, the cube rises by 2 cm the side of the cube will be
A.5 cm
B.10 cm
C.12.5 cm
D.15 cm
E.20 cm
The illumination level in the houses is usually in the range
A.10 to 20 lumens/m2
B.100 to 1400 lumens/m2
C.400 to 650 lumens/m2
D.1200 to 1600 lumens/m2
E.2500 to 3000 lumens/m2
Exhaust valve temperature is about
A.35?C
B.100?C
C.150?C
D.500?C
E.1000?C
