# General Thoughts: Engineering Studies (1 Viewer)

#### EpaX

##### Member
What did everyone get for MC? I got:
1)C
2)C
3)B
4)C
5)A
6)D
7)A
8)B
9)A
10)A
11)C
12)A
13)C
14)D
15)C
16)B
17)D
18)B
19)C
20)B
Q4 is definitely D, Q10 i think should be B, and Q14 should be B.

#### orcevalm

##### Member
What did everyone get for the Power question? the ferry one? I got o.something KW. its probs wrong

#### Shackleford

##### New Member
Q20 should be A. Its a tricky question. You need to calculate 'y' which is 96, as the top half of the beam undergoes compressive stress. 'm' can be calculated by drawing up a basic SFD and BMD, which is 12kNm. Plug it into the bending stress formula, and it would be approximately 11.3MPa. The given area is useless information. Q10 answer:B would make some sense, as you'd average out the radii to get 16.5, which is the radius along the neutral axis. IDK about 14, I put down B for that.

##### i'm the cook
What did everyone get for the Power question? the ferry one? I got o.something KW. its probs wrong
0.71 something

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#### chrisdelinet

##### Member
got that to but i think i got tension

for the truss question BC was 15kn in tension and DF was redundant

##### i'm the cook
What did everyone get for MC? I got:
1)C
2)C
3)B
4)C
5)A
6)D
7)A
8)B
9)A
10)A
11)C
12)A
13)C
14)D
15)C
16)B
17)D
18)B
19)C
20)B
1)C
2)C
3)B
4)D
5)A
6)D
7)A
8)B
9)A
10)B
11)C
12)A
13)C
14)B (should be D, you were correct)
15)C
16)B
17)D
18)A (pretty sure this is wrong)
19)C
20)A

#### EpaX

##### Member
DF was redundant
omg i spent so long in the exam wondering why equilibrium was being violated :'(

##### i'm the cook
got that to but i think i got tension

for the truss question BC was 15kn in tension and DF was redundant
BC = (22.5*7.5 - 30*3.75)/3.75 (assumed compression)

#### chrisdelinet

##### Member
Q20 should be A. Its a tricky question. You need to calculate 'y' which is 96, as the top half of the beam undergoes compressive stress. 'm' can be calculated by drawing up a basic SFD and BMD, which is 12kNm. Plug it into the bending stress formula, and it would be approximately 11.3MPa. The given area is useless information. Q10 answer:B would make some sense, as you'd average out the radii to get 16.5, which is the radius along the neutral axis. IDK about 14, I put down B for that.
Q20) B <--- darn this i put 154 into equation
Q10) B <--- just guessed really
Q14) D <--- B had a weird thing in the hole, therefore i reasoned it had to be D

#### EpaX

##### Member
14)B (should be D, you were correct)
But wouldn't that edge be visible for the flange, and it also wouldn't be sectioned because it's not on the cutting plane..?

#### Shackleford

##### New Member
The power question would be different. You will need to calculate the new force as instead, you are pulling the boat up the plane which would constitute to a mix of frictional and weight pulling down the plane you'd need to overcome. This means you cannot use the answer from part (i) for this question. I think its approximately 4kW. For that friction boat question/power.

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##### i'm the cook
The power question would be different. You will need to calculate the new force as instead, you are pulling the boat up the plane which would constitute to a mix of frictional and weight pulling down the plane you'd need to overcome. This means you cannot use the answer from part (i) for this question. I think its approximately 4kW.
the F in part i is overcoming the weight.

#### chrisdelinet

##### Member
omg i spent so long in the exam wondering why equilibrium was being violated :'(
i did the calculations and ended up with zero, therefore to double check i looked at the joint F (i believe that it was this joint on the top of my head) and it had three members there. I could not close the force polygon if i tried to include all three members, but i could by omitting DF, therefore im quite certain its redundant. (if you wanted my thought process =D)

#### Shackleford

##### New Member
No it said to prevent it from slipping. So friction would be helping you to prevent the boat from sliding down the plane.

#### chrisdelinet

##### Member
No it said to prevent it from slipping. So friction would be helping you to prevent the boat from sliding down the plane.
i can't believe i did not see that, i added them instead (weight component and friction) ...

#### chrisdelinet

##### Member
What did everyone do for that centre of mass question? i used moments from the nose of the plane, but don't know if it was correct or not.

##### i'm the cook
What did everyone do for that centre of mass question? i used moments from the nose of the plane, but don't know if it was correct or not.
moments from center of mass

##### i'm the cook
No it said to prevent it from slipping. So friction would be helping you to prevent the boat from sliding down the plane.
ahh now i get what you're saying. ffs that's such a stupid mistake

#### mirachael

##### Active Member
What did everyone get for MC? I got:
1)C
2)C
3)B
4)C
5)A
6)D
7)A
8)B
9)A
10)A
11)C
12)A
13)C
14)D
15)C
16)B
17)D
18)B
19)C
20)B
Whoops typo I got B for 10. And shit didn't see the compression part for 20. Well there goes my state rank.

#### mirachael

##### Active Member
18)A (pretty sure this is wrong)
0.16 (A) is what you get when you divide Load over effort. However, the machine isn't necessarily 100% efficient so VR!=MA so you have to find VR on its own. This is basically (2*170/700)*(20/50)=0.19 which is B