Mechanical Engineering MCQs

2075 MCQs  (Page 43 of 208)

Depending on the radiating properties, a body will be white when_________________?
A. P = 0, x = 0 and a = 1
B. P=l,t = 0anda = 0
C. P = 0, x = 1 and a = 0
D. X = 0, a + p = 1
Depending on the radiating properties, a body will be opaque when _________________?
A. P = 0, x = 0 and a = 1
B. P=l,x = 0anda = 0
C. P = 0, x = 1 and a = 0
D. X – 0, a + p = 1
Which is the correct statement about law of polygon of forces ?
A. If any number of forces acting at a point can be represented by the sides of a polygon taken in order, then the forces are in equilibrium
B. If any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon, then the forces are in equilibrium
C. If a polygon representing forces acting at a point is closed then forces are in equilibrium
D. If any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon taken in order, then the forces are in equilibrium
If a number of forces act simultaneously on a particle, it is possible _____________________?
A. Not a replace them by a single force
B. To replace them by a single force
C. To replace them by a single force through c.g.
D. To replace them by a couple
A force is completely defined when we specify_______________?
A. Magnitude
B. Direction
C. Point of application
D. All of the above
Effect of a force on a body depends upon ________________?
A. Magnitude
B. Direction
C. Position or line of action
D. All of the above