Explore topic-wise MCQs in Engineering Mechanics.

This section includes 11 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Mechanics knowledge and support exam preparation. Choose a topic below to get started.

1.

WHAT_IS_K.I??$
A. 0
B. 1
C. -1
D. ‚àû
Answer» C. -1
Discussion
2.

155N?$

A. 257.1N
B. 200N
C. 175N
Answer» C. 175N
Discussion
3.

α = cos-1(A.B/AB). What is the range of α?$#

A. 0˚<α<90˚
B. 0˚<α<180˚
C. 90˚<α<180C
D. 0˚<α<45˚
Answer» B. 0‚àö√Ñ‚àö‚àÇ<‚âà√≠¬¨¬±<180‚àö√Ñ‚àö‚àÇ
Discussion
4.

What is {(i.i) + (-i.j) + (-k.k) + (k.i)}.(Ai +Bj + Cz)?$

A. 1
B. 0
C. A + B + C
D. -1
Answer» D. -1
Discussion
5.

What is (AxB).(BxA); or A = A1i + A2j + A3k and B = B1i + B2j + B3k?

A. 0
B. A1B1A2B2i + A2B2A3B3j + A3B3A1B1k
C. A1B1A1B2i + A2B2A3B2j + A3B3A1B3k
D. A1B1A2B1i + A2B2A2B3j + A3B3A2B1k
Answer» B. A1B1A2B2i + A2B2A3B3j + A3B3A1B1k
Discussion
6.

What is the value of {(AxB).(C.D)x(AxB).(C.D)}? For the four vectors A, B, C and D, with A, B, C and D all lying in the same plane?

A. i + j + k
B. ‚àö3(i + j + k)
C. 0
D. -1(i + j + k)
Answer» B. ‚Äö√Ñ√∂‚àö‚Ć‚àö‚àÇ3(i + j + k)
Discussion
7.

Which is true for two vector A = A1i + A2j + A3k and B = B1i + B2j + B3k?

A. A.B = A1B1 + A2B2 + A3B3
B. AxB = A1B1 + A2B2 + A3B3
C. A.B = A1B2 + A2B3 + A3B1
D. AxB = A1B2 + A2B3 + A3B1
Answer» B. AxB = A1B1 + A2B2 + A3B3
Discussion
8.

What is multiplication law?

A. A.B =B.A
B. a(A.B) = A.(aB)
C. A.(B+D) = (A.B) + (A.D)
D. a(A.B) = AxB
Answer» C. A.(B+D) = (A.B) + (A.D)
Discussion
9.

What is Distributive law?

A. A.B =B.A
B. a(A.B) = A.(aB)
C. A.(B+D) = (A.B) + (A.D)
D. a(A.B) = AxB
Answer» D. a(A.B) = AxB
Discussion
10.

Which statement is right?

A. Communitive law: A.B =B.A
B. Multiplicative law: a(A.B) = Ax(aB)
C. Multiplicative law: A.(B+D) = (A.B) + (A.D)
D. Communitive law: a(A.B) = A.(aB)
Answer» B. Multiplicative law: a(A.B) = Ax(aB)
Discussion
11.

For two vectors A and B, what is A.B (if they have angle α between them)?$

A. |A||B| cosα
B. |A||B|
C. √(|A||B|) cosα
D. |A||B| sinα
Answer» B. |A||B|
Discussion