Haryana Police Exam (07.08.2021) Shift II

51. Which one of the following is not a function of the liver?

(1) Regulation of blood sugar
(2) Enzyme activation
(3) Detoxification
(4) Reproduction

Correct Answer: (4) Reproduction

Solution:Liver is the largest gland in the body. It produces bile and other digestive pigments. It helps to destroy the dead RBCs and also helps in conversion of glycogen to glucose and vice versa.

The reproduction is a process of formation of new individuals. It is carried out by the reproductive organs such as testes and ovary.

52. Proteins are made up of

(1) Sugars
(2) Amino acids
(3) Fatty acids
(4) Nucleic acids

Correct Answer: (2) Amino acids

Solution:Amino acids are the monomers that make up proteins.

Specifically, a protein is made up of one or more linear chains of amino acids, each of which is called a polypeptide.
There are 20 types of amino acids commonly found in proteins.

53. Which vitamin is needed to prevent Xerophthalmia?

(1) A
(2) B
(3) C
(4) D

Correct Answer: (1) A

Solution:Xerophthalmia refers to the spectrum of ocular disease caused by severe Vitamin A deficiency.

Vitamin A serves several essential functions in the eye, and deficiency can lead to a constellation of ocular signs and symptoms that affect the conjunctiva, cornea, and retina.

54. Hepatitis is a general term for a disease that is caused by:

(1) Viruses
(2) Bacteria
(3) Parasites
(4) All the above

Correct Answer: (1) Viruses

Solution:Hepatitis is an inflammation of the liver. The condition can be self limiting or can progress to fibrosis (scarring). cirrhosis or liver cancer. Hepatitis viruses are the most common cause of hepatitis in the world.

There are 5 main hepatitis viruses, referred to as types A. B, C, D and E. Hepatitis A and E are typically caused by ingestion of contaminated food or water. Hepatitis B, C and D usually occur as a result of parenteral contact with infected body fluids.

55. What happens to the resistance of a wire when its length is doubled?

(1) Gets doubled
(2) Becomes half
(3) Becomes nil
(4) None of the above

Correct Answer: (1) Gets doubled

Solution:The resistance is directly proportional to the length of the conductor and inversely proportional to the crossectional area of the conductor.

Doubling the length doubles the resistance.

56. The resistance which can be changed as desired is called:

(1) Wire joints
(2) Fixed resistance
(3) Variable resistance
(4) A switch

Correct Answer: (3) Variable resistance

Solution:It is easy to vary or change the resistance of a variable resistor to a desired value.

The process of limiting or restricting the electric current to a certain level is called resistance. The device, which is used to restrict the flow of electric current to certain level, is called resistor.
The device, which not only restricts the flow of electric current but also control (increase and decrease) the flow of electric current is called variable resistor.

57. Rheostat is the other name of:

(1) Fixed resistance
(2) Variable resistance
(3) Insulator
(4) Conductor

Correct Answer: (2) Variable resistance

Solution:Rheostat is adjustable resistor used in applications that require the adjustment of current or the varying of reststance in an electric circuit.

The rheostat can adjust generator characteristics, dim lights, and start or control the speed of motors.
The other name of rheostat is variable resistance

58. Which one is not the form of Biocides?

(1) Salt
(2) Iodine
(3) Sugar
(4) Bleach

Correct Answer: (4) Bleach

Solution:Biocides are substances or products used to protect against unwanted plants, animals, or microorganisms. They are produced in liquid and powder forms, in ready-to-use formulations, or as concentrates, and are applied using a variety of techniques.

Biocides are substances that can destroy living organisms. The use of a chemical or biocide that kills organisms such chlorine bleach is not recommended.

59. What is Rodenticide?

(1) A medicine to kill worms
(2) A medicine to kill animals
(3) A lubricant
(4) A pesticide

Correct Answer: (4) A pesticide

Solution:Rodenticides are pesticides that kill rodents. Rodents include not only rats and mice. but also squirrels, porcupines etc.

Rodenticides are usually formulated as baits, which are designed to attract animals.

60. What is NBR?

(1) Normal Acrylonitrile-butadiene rubber
(2) Natural Acrylonitrile-butadiene rubber
(3) N Acrylonitrile-butane rubber
(4) Acrylonitrile-butadiene rubber

Correct Answer: (4) Acrylonitrile-butadiene rubber

Solution:Nitrile rubber (NBR), also called nitrile-butadiene rubber, is an oil resistant synthetic rubber produced from a co-polymer of acrylonitrile and butadiene.