Capillarity is due to
A.Cohesion
B.Adhesion
C.Adhesion and cohesion
D.Molecular structure
E.Gravity
Category: Mechanical Engineering Mcqs
Which of the following space needs maximum number of air changes per hour?
A.Assembly halls
B.Restaurants
C.Bed-rooms
D.Class rooms
Permissible percentage of moisture in dry woods for pattern making is
A.Zero percent
B.1 – 2 percent
C.2 – 5 percent
D.Upto 15 percent
E.Upto 25 percent
The shape of the Kem area for a rectangular section is
A.Circle
B.Square
C.Rectangle
D.Parallelogram
E.Rhombus
Static loading of a specimen
A.Is done in steps
B.Is done by continuously increasing the work load
C.Is done by applying load in a short period during specified intervals
D.Is done by applying the load slowly enough so that all parts of the specimen are in equilibrium at any instant
E.None of the above
A body is vibrating with simple harmonic motion of aplitude 5 cm frequency 10 vibrations per second. The maximum value of velocity in cm/s will be
A.3.14 cm/s
B.31.4 cm/s
C.314 cm/s
D.3140 cm/s
E.31400 cm/s
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
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 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
