Which of the following is not intramolecular force?
Anonymous Quiz
75%
Hydrogen bond
9%
Covalent bond
6%
Ionic bond
10%
Metallic bond
🤔1
❤2
#kutaa_12ffaa
Sagantaan qoormaata kutaa 12ffaa kan bara 2018 ifoomeera.
🔰Bu'uura kanaan, barattoonni qormaata saanii karaa onlaayinii (Computer-Based Testing - CBT) fudhatan marsaa jaha keessatti qoratamu.
🔰 Marsaa 1ffaa irraa hanga marsaa 3ffaatti barattoonni damee Saayinsii Uumamaa ni qoramu.
🔰Marsaa 4ffaa irraa hanga marsaa 6ffaatti immoo barattoonni damee Saayinsii surroundings Hawaasaa ni qooramu.
Sagantaa qoormaatichaa suuraa armaan olii irraa ilaaluu ni dandeessu.
Sagantaan qoormaata kutaa 12ffaa kan bara 2018 ifoomeera.
🔰Bu'uura kanaan, barattoonni qormaata saanii karaa onlaayinii (Computer-Based Testing - CBT) fudhatan marsaa jaha keessatti qoratamu.
🔰 Marsaa 1ffaa irraa hanga marsaa 3ffaatti barattoonni damee Saayinsii Uumamaa ni qoramu.
🔰Marsaa 4ffaa irraa hanga marsaa 6ffaatti immoo barattoonni damee Saayinsii surroundings Hawaasaa ni qooramu.
Sagantaa qoormaatichaa suuraa armaan olii irraa ilaaluu ni dandeessu.
❤5
Which one of the following statement is not true about the purposes of simple machines?
Anonymous Quiz
12%
They are force multipliers.
1%
They are direction changers.
39%
They can act as both force multipliers and direction changers at the same time.
48%
They can act as both force multipliers and speed multipliers at the same time.
A simple machine is able to move a 400N load a distance of 20cm when a force of 20N is moved the distance of 5m, then what is the actual mechanical advantage and the efficiency of the machine ?
Anonymous Quiz
12%
25 and 80%
24%
0.04 and 80%
61%
20 and 80%
2%
0.2 and 80%
👍1
A simple machine has an efficiency of 0.75 and velocity ratio 12. Then what is the load that can be moved if an effort of 100N is applied?
Anonymous Quiz
18%
9N
57%
900N
14%
75N
11%
1200N
An effort is 200N is applied on to a wedge of 4cm thick and 12cm long to split a log of 500N into parts. Then what is the efficiency of the wedge?
Anonymous Quiz
51%
83.33%
17%
75%
19%
80. 34%
13%
66.67%
Which simple machine can not be used to increase force?
Anonymous Quiz
18%
Lever
18%
Wheel and axle
49%
Fixed pulley
14%
Movable pulley
❤3
A 10cm long and 2cm wide metal wedge is used to split a wood. What is the velocity ratio of the wedge?
Anonymous Quiz
11%
3
26%
0.2
57%
5
7%
20
A screw shaft has a diameter of 4cm and its adjacent threads are 0.314cm apart. What is the velocity ratio of the screw?
Anonymous Quiz
22%
10
20%
20
20%
30
39%
40
👏2
If an inclined plane of 4m length and 1m height has an efficiency of 0.5, what is its mechanical advantage?
Anonymous Quiz
14%
3
57%
2
20%
5
9%
6
❤1
Which one of the following statement is true about the classes of lever in simple machines?
Anonymous Quiz
66%
In 2nd class lever, load is located between effort and fulcrum.
19%
In 3rd class lever, fulcrum is located between load and effort.
5%
In 1st class lever, effort is located between fulcrum and load.
10%
In 2nd class lever, VR is less than MA.
❤1
Which one of the following statement is true about simple machines?
Anonymous Quiz
25%
If the machine is speed multipliers, then its VR > 1 due to its distance moved by load is large.
25%
If the machine is force multipliers, then its MA is greater than VR due to its load is large.
22%
If the machine has no energy loses, its efficiency is greater than 1 due to its MA is equal to VR.
27%
If the machine is force multipliers, its VR > 1 due to its distance moved by load is less.
❤2
If the efficiency of one machine is 100%, then which one of the following is not true?
Anonymous Quiz
16%
Its velocity ratio is equal to MA.
13%
Its IMA is equal to its AMA.
20%
There is no energy loses in the machine.
51%
The types of machines must be inclined plane, screw, and wedge to get 100% efficiency.
❤1
A 200N force is required to be applied at one end of 1m long lever. If the distance from the effort to fulcrum is 80cm, inorder to lift a load of 600N placed at the other end. What is the efficiency of the lever?
Anonymous Quiz
21%
83%
54%
75%
10%
17%
15%
25%
❤1
Which one of the following is NOT true about pulley systems?
Anonymous Quiz
37%
Fixed pulley has velocity ratio of 2.
16%
Movable pulley has velocity ratio of 2.
27%
Compound pulley is a combination of fixed and movable pulley.
21%
Fixed pulley has no mechanical advantage.
❤3
Which of the following lines are parallel to each other?
Anonymous Quiz
7%
3x - y + 5 = 0 and x + 3y - 1 = 0
31%
3x - 4y + 1 = 0 and 4x - 3y + 1 = 0
20%
4x - 10y + 8 = 0 and 10x + 6y - 3= 0
42%
2x + 2y = 4 and x + y = 10
❤1