Engineering Questions with Answers - Multiple Choice Questions

Home » MCQs » Aeronautical Engineering » Machine Dynamics MCQ – Precision Points for Function Generation

# Machine Dynamics MCQ – Precision Points for Function Generation

The degree of the Bezier curve with n control points is:

a) n + 1

b) n – I

c) n

d) 2n

**
View Answer**

Answer: a

Explanation: The degree of a Bézier curve defined by n+1 control points is n:

In each basis function, the exponent of u is i + (n – i) = n. Therefore, the degree of the curve is n.

The degree of the B-spline with varying knot vectors:

a) Increases with knot vectors

b) Decreases with knot vectors

c) Remains constant

d) none of the mentioned

**
View Answer**

Answer: a

Explanation: Changing the degree of the curve due to the increase of knots will change the shape of the curve globally and will not be considered. Therefore, inserting a new knot causes a new control point to be added. In fact, some existing control points are removed and replaced with new ones by corner cutting.

C” continuity refers to:

a) Common tangent

b) Common point

c) Common curvature

d) Common normal

**
View Answer**

Answer: a

Explanation: C‘ continuity refers to Common curvature .

C0 continuity refers to Common point.

C” continuity refers to Common tangent.

C‘ continuity refers to:

a) Common tangent

b) Common point

c) Common curvature

d) Common normal

**
View Answer**

Answer: c

Explanation: C‘ continuity refers to Common curvature .

C0 continuity refers to Common point.

C” continuity refers to Common tangent.

C0 continuity refers to:

a) Common tangent

b) Common point

c) Common curvature

d) Common normal

**
View Answer**

Answer: b

Explanation: C‘ continuity refers to Common curvature .

C0 continuity refers to Common point.

C” continuity refers to Common tangent.

The number of non-coincidental points required to define the simplest surface are:

a) 4

b) 3

c) 2

d) 5

**
View Answer**

Answer: b

Explanation: None.

Convex hull property is satisfied by the following surface:

a) Bezier

b) B-spline

c) NURBS

d) All of the mentioned

**
View Answer**

Answer: b

Explanation: The curve that follows a convex hull property is B-spline.

The tensor product technique constraints surfaces by two curves.

a) Adding

b) Subtraction

c) Multiplying

d) Dividing

**
View Answer**

Answer: c

Explanation: None.

The degrees of freedom of a two-node bar element are:

a) 1

b) 2

c) 3

d) 4

**
View Answer**

Answer: c

Explanation: None.

The shape functions of a two-node bar element are:

a) Linear

b) Quadratic

c) Constant

d) None of the mentioned

**
View Answer**

Answer: a

Explanation: None.