a2zinterviews

17.	Time taken by Sun's light to reach Earth is
	A.  6 min 18 sec
	B.  9 min
	C.  8 min 18 sec
	D.  1.9 min 18 sec

Answer

Ans: C 8 min 18 sec

18.	The stratosphere is said to be ideal for flying jet aircraft because
	A.  This layer is rich in ozone which reduces fuel consumption
	B.  Of the absence of the clouds and other weather phenomena
	C.  The temperature is constant and ideal for aircraft engine efficiency
	D.  The temperature is constant and ideal for aircraft engine efficiency

Answer

Ans: B Of the absence of the clouds and other weather phenomena

19.	Cycle of sun spots is
	A.  12 years
	B.  9 years
	C.  10 years
	D.  11 years

Answer

Ans: D 11 years

20.	The dark part of the moon is always calm and dark which is called
	A.  Ocean of storms
	B.  Area of storms
	C.  Sea of tranquility
	D.  None of these

Answer

Ans: C Sea of tranquility