UGC NET Questions (Paper – 1)

Statements A, B, C, D and F are correct: solid fuels and poor ventilation raise indoor pollutants; exposure increases respiratory risks especially for women/children; cleaner fuels/improved stoves reduce exposure; and additional sources include materials, tobacco and chemicals. Statement E is false because exposure is strongly shaped by time spent indoors and gendered household roles. Hence, the correct combination is A, B, C, D and F only.

Option A:
Option A is correct because it includes all true statements and excludes only E, which wrongly denies the importance of time use and gender roles in exposure.

Option B:
Option B is incorrect because it omits F, thereby ignoring important indoor sources like building materials, tobacco smoke and household chemicals.

Option C:
Option C is incorrect since it includes E (false) and also omits A, missing the key role of solid fuels in indoor smoke generation.

Option D:
Option D is incorrect because it omits B, underplaying the critical role of ventilation in determining indoor concentrations.

Statements A, B and C reflect recommended maintenance practices for ICT hardware, while D is unsafe. Good ventilation and dust control prolong equipment life, surge protection reduces electrical damage and cleaning peripherals supports usability and health. Attempting repairs without knowledge or precautions can cause harm to both the user and the equipment, so D must be excluded. Hence, the combination A, B and C only is correct.

Option A:
Option A is correct because it aggregates the three true maintenance guidelines and omits D, which encourages risky behaviour. It aligns with basic safety instructions given in ICT laboratories and computer centres.

Option B:
Option B is incomplete because it includes only A and B and leaves out C. Maintaining cleanliness of keyboards and mice is also part of responsible hardware care, so excluding C makes the description partial.

Option C:
Option C is incorrect because it groups B, C and D and accepts D. Although B and C are correct, adding D suggests that untrained users can safely repair hardware, which contradicts standard safety guidance.

Option D:
Option D is incorrect because it treats all four statements as correct and hence legitimises D. Since D promotes unsafe practices, this combination cannot be accepted.