General Science - Online Test
Q1.
For a rope of yield strength loaded in tension with weight Mg the minimum area A of the rope should be
Answer : Option C
Explaination / Solution:
We know that Yield strength times the Area give the weight of the body.
As Yield strength = weight of body/area
For safety purposes
Yield strength weight of body/area
Mg/A
A Mg/
Q2. What is the other name for opportunity cost in economics
Answer : Option B
Explaination / Solution:
Opportunity Cost is also known as Economic Opportunity Loss and it is the highest value alternative forgone. Moreover, Real cost is the fixed cost, which you have paid and therefore, opportunity cost is not a real cost.
Q3. Out of the following which is not an example of parasitism?
Answer : Option D
Explaination / Solution:
E.coli in human intestine obtain their food from undigested food remains and do not harm so, it is not an example of parasitism in which one organism is harmed but other is benefited.
Q4. In plant, nitrate is reduced to ammonia state in two steps. In second step electrons are donated by
Answer : Option B
Explaination / Solution:
During ammonification process involve conversion of nitrate into ammonia. This process involves two steps. Second steps require electron that is donated by Ferredoxin.
Q5. What should be filled in to replace question mark in the following sequence :?
Trypsinogen →Trypsin
Answer : Option A
Explaination / Solution:
Trypsinogen is activated by an enzyme, enterokinase, secreted by the intestinal mucosa into active trypsin.
Q6. At the minimum deviation , the refracted ray inside the prism
Answer : Option B
Explaination / Solution:
No Explaination.
Q7. The growing immunity, after getting the disease free body
Answer : Option A
Explaination / Solution:
When a host is exposed to antigens, antibodies are produced in the host body. This type of immunity is called active immunity. Hence, growing immunity after getting the disease free body is active acquired immunity.
Q8. According to quantum theoretical model of an atom each orbital is designated by three quantum numbers labelled as n, l and ml. These are referred to respectively as
Answer : Option B
Explaination / Solution:
Quantum numbers designate specific shells, subshells, orbitals, and spins of electrons. This means that they describe completely the characteristics of an electron in an atom, i.e., they describe each unique solution to the Schrödinger equation, or the wave function, of electrons in an atom.
There are a total of four quantum numbers: the principal quantum number (n), the orbital angular momentum quantum number (l), the magnetic quantum number (ml), and the electron spin quantum number (ms). The principal quantum number, nn , describes the energy of an electron and the most probable distance of the electron from the nucleus. In other words, it refers to the size of the orbital and the energy level an electron is placed in. The number of subshells, or ll , describes the shape of the orbital. It can also be used to determine the number of angular nodes.
The magnetic quantum number, ml, describes the energy levels in a subshell, and ms refers to the spin on the electron, which can either be up or down.
Q9. Silviculture is the management of-
Answer : Option D
Explaination / Solution:
No Explaination.
Q10.
In Pavlov’s conditioned reflex experiment find the correct matches :
| Column A | Column B |
| a) conditioned stimulus | i) salivation in response to food |
| b) conditioned response | ii) food itself |
| c) unconditioned stimulus | iii)sound of the bell |
| d) unconditioned response | iv) salivation in response to bell |
Answer : Option C
Explaination / Solution:
There are different kinds of stimulus that is received by different receptors in our body. Hearing of sound of bell is conditioned stimulus and salivation in response to bell is conditioned response. Food itself is conditioned stimulus and salivation in response to food is unconditioned response.
