Previous year MCQs

General science UPPSC 1995 GS-I
Question

Maximum temperature inside pressure cooker depends on:

Answer & Solution

Answer: (Detailed Solution Below)

Option A: Area of hole on die top and weight kept on it

Detailed Solution:

The correct answer is “Area of hole on die top and weight kept on it”.
Area of the hole determines the rate at which steam escapes. A smaller hole will trap more steam, increasing pressure and temperature. Weight on the top controls the pressure inside the cooker. A heavier weight increases pressure, leading to a higher boiling point of water and thus, a higher temperature.

Similar Questions:

Which of the following is correct?
  1. A) All the blood in the body is absorbed through the kidneys
  2. B) All the blood in the body passes through the kidneys
  3. C) All the blood in the body is filtered through the kidneys
  4. D) All the blood in the body is made through the kidneys
Consider the following effects of genetic engineering?

1. Disease resistance
2. Growth promotion
3. Animal cloning
4. Human cloning

Of the above, that have been tried with certain amount of success include?
  1. A) 1, 3 and 4
  2. B) 2, 3 and 4
  3. C) 1, 2 and 4
  4. D) 1, 2 and 3
Given below are two statements, one labelled as Assertion (A) and the other as Reason (R).

Assertion (A): Most of the vitamins are not synthesised in human body.
Reason (R): Human organ synthesise only essential micronutrients.

Select the correct answer form the code given below.
  1. A) Both (A) & (R) are true & (R) is correct explanation of (A)
  2. B) Both (A) & (R) are true, but (R) is not correct explanation of (A)
  3. C) (A) is true, but (R) is false.
  4. D) A) is false, but (R) is true.
Muslim League was established in 1906 at:
  1. A) Bombay
  2. B) Lahore
  3. C) Dhaka
  4. D) Delhi
Which of the following is a stem?
  1. A) Turnip
  2. B) Ginger
  3. C) Carrot
  4. D) Sweet potato
The vaccine for Polio was first prepared by:
  1. A) Paul Ehrlich
  2. B) Jonas Salk
  3. C) Louis Pasteur
  4. D) Joseph Lister
Consider the following statements about haemoglobin and select the correct answer from the code even below:

1. It contains iron
2. It imparts red colour to the blood
3. It provides immunity against certain diseases
4. It is a carrier of oxygen in blood

Code:
  1. A) 1, 2 and 3
  2. B) 2, 3 and 4
  3. C) 1, 2 and 4
  4. D) 1, 2, 3 and 4
The stench due to leakage from the LPG cylinder is because of:
  1. A) Methane
  2. B) Propane
  3. C) Butane
  4. D) Ethyl mercaptan
Assertion (A): Some bacteria can synthesise their own food.
Reason (R): These bacteria have green matter called chloroplasts.

Codes:
  1. A) Both A and R are true and R is the correct explanation of A
  2. B) Both A and R are true but R is not the correct explanation of A
  3. C) A is true but R is false
  4. D) A is false but R is true
The thermometer suitable to measure 2000 °C is
  1. A) gas thermometer
  2. B) mercury thermometer
  3. C) total radiation pyrometer
  4. D) vapour pressure thermometer
The alkaloid caffeine is present in
  1. A) Tea only
  2. B) Coffee only
  3. C) Tea and coffee both
  4. D) Lemon water
Which one of the following is a water borne disease?
  1. A) Small pox
  2. B) Malaria
  3. C) Cholera
  4. D) Tuberculosis