Engineering Mechanics Mock Test 1

10%

Question 1 of 10

1. 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?

i + j + k

-1(i + j + k)

√3(i + j + k)

Question 1 of 10

Question 2 of 10

2. We first make equilibrium equations and then the free body diagram and then solve the question.

True

False

Question 2 of 10

Question 3 of 10

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

90˚<α<180C

0˚<α<180˚

0˚<α<45˚

0˚<α<90˚

Question 3 of 10

Question 4 of 10

4. The resultant of three equal vectors having mutual angles being 120 degrees and being originated from a single point is zero.

False

True

Question 4 of 10

Question 5 of 10

5. In right handed coordinate system which axis is considered to be positive?

The thumb is x-axis, fingers curled from z-axis to y-axis

The thumb is z-axis, fingers curled from x-axis to y-axis

The thumb is z-axis, fingers curled from y-axis to x-axis

The thumb is y-axis, fingers curled from x-axis to z-axis

Question 5 of 10

Question 6 of 10

6. If the force vector F is having its x-axis component being equal to Z N, y-axis component be X N and z-axis component be Y N then vector F is best represented by?

Yi + Xj + Zk

Zi + Yj + Xk

Xi + Yj + Zk

Zi + Xj + Yk

Question 6 of 10

Question 7 of 10

7. If a car is moving forward, what is the direction of the moment of the moment caused by the rotation of the tires?

It is heading outwards, i.e. the direction is towards outside of the car

It is heading forward, i.e. the direction is towards the forward direction of the motion of the car

It is heading inwards, i.e. the direction is towards inside of the car

It is heading backward, i.e. the direction is towards the back side of the motion of the car

Question 7 of 10

Question 8 of 10

8. The ___________ forces do not cause the rotation.

Parallel

Non-Parallel

Non-concurrent

Concurrent

Question 8 of 10

Question 9 of 10

9. If a vector is multiplied by a scalar:

You cannot multiply the vector with a scalar

Then its magnitude is increased by the square root of that scalar’s magnitude

Then its magnitude is increased by the amount of that scalar’s magnitude

Then its magnitude is increased by the square of that scalar’s magnitude

Question 9 of 10

Question 10 of 10

10. Dividing the X-axis component and the Y-axis component of the of the vector making an angle with Y-axis α will give us.

Tan α

Cot α

Sec α

Question 10 of 10