A:-lowest rank coal
:-highest rank coal
C:-used in metallurgy of iron
D:-none of the above
Correct Answer:- Option-A
Question10:-During fermentation of molasses, the enzyme which converts glucose and fructose into alcohol is:

D:-maltase
Correct Answer:- Option-A

Question11:-For good performance, the hydrocarbon molecules in a diesel fuel should be:
A:-branch-chained

-side-chained
C:-straight-chained
D:-aromatic
Correct Answer:- Option-C
Question12:-EDTA method of determining hardness of water can be used to determine:
A:-all types of hardness
B:-temporary hardness
C:-permanent hardness only
D:-alkaline hardness only
Correct Answer:- Option-A
Question13:-During reverse osmosis:
A:-Dissolved salts are pushed out through the semipermeable membrane
B:-only dissolved ionic salts are pushed out through the semipermeable membrane
C:-pure water is pushed out through semipermeable membrane.
D:-both water and dissolved salts are pushed out through the semipermeable membrane
Correct Answer:- Option-C

Question14:-Swimming for a long time in salt water makes the skin of one’s fingertips wrinkled. Which one of the following
properties is responsible for this observation?

A:-Osmosis
B:-Dialysis
:-Electrodialysis
D:-Coagulation
Correct Answer:- Option-A
Question15:-Reflectivity of a black body is ---~
A:-0
5
C:-0.8
D:-1.0
Correct Answer:- Option-A
Question16:-For supporting horizontal cylindrical vessels ---------~ supports are commonly used
A:-saddle
B:-skirt
C:-lug
D:-bracket
Correct Answer:- Option-A
Question17:-Scale formation in boilers causes :
A:-no loss of heat
-wastage of heat
crease in efficiency
D:-none of the above
Correct Answer:- Option-B
Question18:-Multiple effect evaporation is carried out , to ---
A:-decreases heat losses
increase capacity
C:-decrease capital cost
D:-decrease working cost