Page 22 - Fizzy Science Corner

81. A 10 cm wide belt, having the speed of 1350 meter per minute, would be appropriate to transfer the
how much H. P. ? (B) 15
82. A tractor driving pulley has its 25 cm diameter and revolving at a speed of 960 r.p.m. If on the shaft of
a thresher, an attached pulley is revolving at a speed of 1600 r.p.m. what would be the diameter of this
pulley ? (C) 12 cm
83. A pulley of 21 cm diameter and revolving at 1600 r.p.m. Find out the speed of the belt running over
it— (B) 1200 m/minute
84. If the distance between two pullies, having the diameter of 45 cm and 39 cm, is 3.2 metre, then what
would be length of required flate belt ?(B) 7.72 m
85. Two pair of bullocks are ploughing a field by victory ploughs at a speed of 2 km/hr. If the average
width of each furrow is 25 cm. How much time will be required to plough one hectare land? Where after
each two hours working, 20 minutes rest is required to provide ?(C) 11 hours 40 minutes
86. If the relative distance is 2.5 metre of centre points of two pullies, having SO cm and 25 cm
diameters, then, how much length (metre) of 'V' belt would be required ? (D) 6.18775
87. A 'chain' contains how much metre ? (A) 20.1168
88. If the rate of electricity is rupee one per unit, then, a 20 h. p. electric motor, having approx. 100%
efficiency will require how much cost (Rs.) on 100 hours running to irrigate the field ? (C) 1500
89. 'Drip' irrigation is generally followed in the country— (A) Israel
90. In India, under canal net-work system of irrigation, generally, how much amount of water is allowed
to run in small canal ? (B) Less than 10 cusec
91. Method of irrigation is— (A) Surface irrigation (B) Sprinkler irrigation (C) Drip irrigation (D) All of
these (Ans : D)
92. The Torque—a power to generate revolutions is expressed as (its unit is kg metre) — (A) Length of
arm (m) x Force (kg)
93. Work is expressed by the formula as— (A) Work = Force (kg) x Distance (m)
94. The length of 'Engineer chain' is— (A) 100 ft
95. The length of 'Gunter chain' is— (A) 66 ft
96. The area of an acre is— (A) 0.40 (B) 0.80 (C) 1.10 (D) None of these (Ans : D)
97. One centimetre is equal to— (B) 10 mm
98. The draft of 'Victory plough' is— (A) 80-100 kg
99. How much horse power (h.p.) is in one kW (Kilowatt) ? (A) 1.34
100. Man power is considered equal to how much horse power (h.p.) ? (A) 0.1