1. QUIZ (Chapter 4)
7. In statics, a couple is defined as __________ separated by a perpendicular distance.
A) two forces in the same direction
B) two forces of equal magnitude
C) two forces of equal magnitude acting in the same direction
D) two forces of equal magnitude acting in opposite directions
8. The moment of a couple is called a _____ vector.
A) Free B) Spin
C) Romantic D) Sliding
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2. QUIZ
9. A general system of forces and couple moments acting on a rigid body can be reduced to a ___ .
A) single force
B) single moment
C) single force and two moments
D) single force and a single moment
10. The original force and couple system and an equivalent force-couple system have the same _____ effect on a body.
A) internal B) external
C) internal and external D) microscopic
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3. QUIZ
11. Consider three couples acting on a body. Equivalent systems will be _______ at different points on the body.
A) Different when located
B) The same even when located
C) Zero when located
D) None of the above.
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4. QUIZ
12. The resultant force (FR) due to a distributed load is equivalent to the _____ under the distributed loading curve, w = w(x).
A) Centroid B) Arc length
C) Area D) Volume
13. The line of action of the distributed load’s equivalent force passes through the ______ of the distributed load.
A) Centroid B) Mid-point
C) Left edge D) Right edge x w F R
Distributed load curve y
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5. QUIZ
14. What is the location of FR, i.e., the distance d?
A) 2 m B) 3 m C) 4 m
D) 5 m E) 6 m
15. If F1 = 1 N, x1 = 1 m, F2 = 2 N and x2 = 2 m, what is the location of FR, i.e., the distance x.
A) 1 m B) 1.33 m C) 1.5 m
D) 1.67 m E) 2 m F R B A d
3 m F R x 2 1
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6. QUIZ 16. FR = ____________ A) 12 N B) 100 N C) 600 N D) 1200 N
17. x = __________.
A) 3 m B) 4 m
C) 6 m D) 8 m
100 N/m
12 m x FR
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QUIZ (Chapter 5)
1. If a support prevents translation of a body, then the support exerts a ___________ on the body.
A) Couple moment
B) Force
C) Both A and B.
D) None of the above
2. Internal forces are _________ shown on the free body diagram of a whole body.
A) Always
B) Often
C) Rarely
D) Never
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QUIZ
3. The beam and the cable (with a frictionless pulley at D) support an 80 kg load at C. In a FBD of only the beam, there are how many unknowns?
A) 2 forces and 1 couple moment
B) 3 forces and 1 couple moment
C) 3 forces
D) 4 forces
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QUIZ
4. Internal forces are not shown on a free-body diagram because the internal forces are_____.
A) Equal to zero
B) Equal and opposite and they do not affect the calculations
Negligibly small
D) Not important
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QUIZ
5. The three scalar equations  FX =  FY =  MO = 0, are ____ equations of equilibrium in two dimensions.
A) Incorrect B) The only correct
C) The most commonly used D) Not sufficient
6. A rigid body is subjected to forces. This body can be considered as a ______ member.
A) Single-force B) Two-force
C) Three-force D) Six-force
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QUIZ
For this beam, how many support reactions are there and is the problem statically determinate? A) (2, Yes) B) (2, No) C) (3, Yes) D) (3, No)
8. The beam AB is loaded as shown: a) how many support reactions are there on the beam, b) is this problem statically determinate, and c) is the structure stable?
A) (4, Yes, No) B) (4, No, Yes)
C) (5, Yes, No) D) (5, No, Yes) F F
Fixed support A B
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QUIZ
9. Which equation of equilibrium allows you to determine FB right away?
A)  FX = B)  FY = 0
C)  MA = 0
D) Any one of the above.
10. A beam is supported by a pin joint and a roller. How many support reactions are there and is the structure stable for all types of loadings?
A) (3, Yes) B) (3, No)
C) (4, Yes) D) (4, No) AX A B FB AY
100 lb
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QUIZ
If a support prevents rotation of a body about an axis, then the support exerts a ________ on the body about that axis. A) Couple moment B) Force C) Both A and B. D) None of the above.
When doing a 3-D problem analysis, you have ________ scalar equations of equilibrium.
3 B) 4
C) 5 D) 6
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QUIZ (Chapter 5: 3D)
13. The rod AB is supported using two cables at B and a ball-and-socket joint at A. How many unknown support reactions exist in this problem?
5 force and 1 moment reaction
B) 5 force reactions
C) 3 force and 3 moment reactions
D) 4 force and 2 moment reactions
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QUIZ
14. A plate is supported by a ball-and-socket joint at A, a roller joint at B, and a cable at C. How many unknown support reactions are there in this problem?
A) 4 forces and 2 moments
B) 6 forces
C) 5 forces
D) 4 forces and 1 moment
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QUIZ
16. What will be the easiest way to determine the force reaction BZ ?
A) Scalar equation  FZ = 0
B) Vector equation  MA = 0
C) Scalar equation  MZ = 0
D) Scalar equation  MY = 0
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