391. What is approximate value of octane number of Natural gas
(A) Less than 100
(B) 120 to 130
(C) Around 150
(D) 85 to 105
Answer: -120 to 130
392. The air / fuel ratio, at which maximum power output is available
(A) Near stoichiometric mixture
(B) 16
(C) Less than 10
(D) Near to 12
Answer: -Near to 12
Answer: -Near to 12
393. One Btu of Energy is equal to kJ:
(A) 1.055
(B) 4.1868
(C) 1.2
(D) 4.5
Answer: -1.055
394. The top portion of the tyre is called
(A) Tread
(B) Rayon cords
(C) Bead wire
(D) None of these
Answer: -Tread
395. Which type of pump is most suitable for high pressure and moderate capacity
pumping?
(A) Rotary positive displacement
(B) Centrifugal
(C) Reciprocating
(D) None of these
Answer: -Reciprocating
396. Hypsometer works on the principle of
(A) Boiling temperature of water varies with atmospheric pressure
(B) Independent of Boiling Temperature
(C) Atmospheric pressure varies with altitude
(D) None of the above
Answer: -Boiling temperature of water varies with atmospheric pressure
397. Which of the following is used to check change in ocular lines position due to column rotation in universal micrometer?
(A) Dial indicator
(B) Slip gauges
(C) Control shaft
(D) Universal microscope
Answer: -Control shaft
398. Which of the following is most convenient to measure the cylindrical ring gauges?
(A) Slip gauges
(B) Micrometer
(C) Measurement by using rollers
(D) Pneumatic comparators
Answer: - Pneumatic comparators
399. Which of the following is best gauge/machine to inspect the parallel screw ring gauges?
(A) Hand micrometer
(B) Plug check gauges
(C) Comparators
(D) Bench micrometer
Answer: -Comparators
400. Which of the following is generally used to calibrate slip gauges?
(A) Micrometer
(B) Collimator
(C) Interferometer
(D) Gap gauge
Answer: -Interferometer
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