NO.21 For a dry sprinkler installed in an insulated freezer box with an internal ambient temperature of -20°F (-29#) where the barrel is exposed to an ambient temperature area of 40°F (4C), what is the minimum exposed barrel length required?

NO.22 A sprinkler with a blue glass bulb represents a temperature classification of

NO.23 A pump with a rated capacity of 3,000 gpm (11,335 L/min) should have what size circulation relief valve?

NO.24 What is the minimum design criteria to protect an exposed nonexpanded Group A plastic stored in a solid pile to a maximum height of 15 ft (4.6 m) in a 26 ft (7.9 m) high building? Piles to be stable with closed arrays.

NO.25 Which type of pipe does not require a special listing to use threaded fittings?

NO.26 How much water would be required to be stored for a system with a demand of 4,300 gpm (16,277 L/min) and a hose stream requirement of 500 gpm (1,893 L/min) for 120 minutes?

NO.27 Extra high temperature sprinklers should be tested every

NO.28 How much pressure is lost due to elevation in water flowing in a pipe from 6 ft (1.8 m) high to 15 ft (4.6 m) high?

NO.29 In an existing system, the vertical clearance between a high volume low speed (HVLS) fan and a sprinkler shall be

NO.30 A sprinkler system employing automatic sprinklers that are attached to a piping system that contains air that might or might not be under pressure, with a supplemental detection system installed in the same areas as the sprinklers, is known as a:

NO.31 The purpose of the owner’s certificate is to

NO.32 A sprinkler system has been installed with 100 sprinklers. What is the minimum number of spare sprinklers to be provided?

NO.33 The minimum diameter of a private service main to a hydraulically calculated sprinkler system that also supplies a fire hydrant is

NO.34 According to NFPA 13, for a high rise building sprinklered throughout, that has four stairwells, each with a standpipe and hose valves, and has a Class I standpipe system, what is the maximum flow rate required to be calculated?

NO.35 The minimum flow rate for the required forward flow test of a backflow prevention assembly shall be the

NO.36 What is the minimum calculated design area for a dry system protecting a light hazard attic space with a roof slope exceeding a rise of 2 units in a run of 12 units and a height at the peak of 10 ft (3 m) above the bottom of the truss using quick response sprinklers?

NO.37 Which of the following should be considered when choosing an occupancy?

NO.38 What is the maximum distance an underground main can be installed under the building to the riser location without additional requirements?

NO.39 How much pressure is lost to friction as 1,200 gpm (4542 L/min) travels through 200 ft (61 m) of 5 in. (130 mm) schedule 40 steel pipe with a C-factor of 120?

NO.40 A owner of a new warehouse wishes to store a Class III product in ordinary cardboard boxes that contain 45 percent by volume expanded plastic. What is the commodity classification?